diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcd9f84..29cd80a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## [1.4.2](https://github.com/biyuehu/tsukiko/compare/v1.4.1...v1.4.2) (2024-07-24)
+
+
+### Bug Fixes
+
+* parser.default() return type ([aa7a414](https://github.com/biyuehu/tsukiko/commit/aa7a414bb89555b3910dd9d229f505891bded4ee))
+
+
+
 ## [1.4.1](https://github.com/biyuehu/tsukiko/compare/v1.4.0...v1.4.1) (2024-07-24)
 
 
diff --git a/docs/classes/AnyParser.md b/docs/classes/AnyParser.md
index 2141ad5..997656b 100644
--- a/docs/classes/AnyParser.md
+++ b/docs/classes/AnyParser.md
@@ -50,7 +50,7 @@ Whether to include the $schema property. Defaults to true.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -64,7 +64,7 @@ Whether to include the $schema property. Defaults to true.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -78,7 +78,7 @@ Whether to include the $schema property. Defaults to true.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -92,7 +92,7 @@ Whether to include the $schema property. Defaults to true.
 
 #### Defined in
 
-[src/parsers/any.ts:11](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/any.ts#L11)
+[src/parsers/any.ts:11](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/any.ts#L11)
 
 ## Methods
 
@@ -120,13 +120,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -138,7 +138,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -148,7 +148,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -170,7 +170,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -198,7 +198,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -220,7 +220,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -244,7 +244,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -266,7 +266,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -288,7 +288,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -320,7 +320,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -348,7 +348,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -376,7 +376,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -404,7 +404,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -426,7 +426,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -454,4 +454,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/ArrayParser.md b/docs/classes/ArrayParser.md
index d231b28..1f9516e 100644
--- a/docs/classes/ArrayParser.md
+++ b/docs/classes/ArrayParser.md
@@ -42,7 +42,7 @@ The parser for array elements.
 
 #### Defined in
 
-[src/parsers/array.ts:43](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/array.ts#L43)
+[src/parsers/array.ts:43](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/array.ts#L43)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The parser for array elements.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The parser for array elements.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The parser for array elements.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The parser for array elements.
 
 #### Defined in
 
-[src/parsers/array.ts:16](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/array.ts#L16)
+[src/parsers/array.ts:16](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/array.ts#L16)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`S`\>[]\>
+> **default**(`value`): [`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`S`\>[]\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`S`\>[]\>
+[`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`S`\>[]\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -296,7 +296,7 @@ The current ArrayParser instance.
 
 #### Defined in
 
-[src/parsers/array.ts:54](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/array.ts#L54)
+[src/parsers/array.ts:54](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/array.ts#L54)
 
 ***
 
@@ -320,7 +320,7 @@ The current ArrayParser instance.
 
 #### Defined in
 
-[src/parsers/array.ts:65](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/array.ts#L65)
+[src/parsers/array.ts:65](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/array.ts#L65)
 
 ***
 
@@ -342,7 +342,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -374,7 +374,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -402,7 +402,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -430,7 +430,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -458,7 +458,7 @@ The current ArrayParser instance.
 
 #### Defined in
 
-[src/parsers/array.ts:77](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/array.ts#L77)
+[src/parsers/array.ts:77](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/array.ts#L77)
 
 ***
 
@@ -486,7 +486,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -508,7 +508,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -536,4 +536,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/BooleanParser.md b/docs/classes/BooleanParser.md
index 8dfb0b6..1c8fe75 100644
--- a/docs/classes/BooleanParser.md
+++ b/docs/classes/BooleanParser.md
@@ -30,7 +30,7 @@ Creates a new instance of BooleanParser.
 
 #### Defined in
 
-[src/parsers/boolean.ts:21](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/boolean.ts#L21)
+[src/parsers/boolean.ts:21](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/boolean.ts#L21)
 
 ## Properties
 
@@ -44,7 +44,7 @@ Creates a new instance of BooleanParser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ Creates a new instance of BooleanParser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ Creates a new instance of BooleanParser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ Creates a new instance of BooleanParser.
 
 #### Defined in
 
-[src/parsers/boolean.ts:10](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/boolean.ts#L10)
+[src/parsers/boolean.ts:10](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/boolean.ts#L10)
 
 ## Methods
 
@@ -114,13 +114,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `boolean`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`boolean`\>
 
 Sets a default value for the parser.
 
@@ -132,7 +132,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `boolean`\>
+[`Parser`](Parser.md)\<`boolean`\>
 
 The current Parser instance.
 
@@ -142,7 +142,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -164,7 +164,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -192,7 +192,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -214,7 +214,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -238,7 +238,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -256,7 +256,7 @@ The current BooleanParser instance.
 
 #### Defined in
 
-[src/parsers/boolean.ts:40](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/boolean.ts#L40)
+[src/parsers/boolean.ts:40](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/boolean.ts#L40)
 
 ***
 
@@ -278,7 +278,7 @@ The current BooleanParser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -300,7 +300,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -332,7 +332,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -360,7 +360,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -388,7 +388,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -416,7 +416,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -438,7 +438,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -466,7 +466,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
 
 ***
 
@@ -484,4 +484,4 @@ The current BooleanParser instance.
 
 #### Defined in
 
-[src/parsers/boolean.ts:30](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/boolean.ts#L30)
+[src/parsers/boolean.ts:30](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/boolean.ts#L30)
diff --git a/docs/classes/ClassParser.md b/docs/classes/ClassParser.md
index 99198cd..1bed45e 100644
--- a/docs/classes/ClassParser.md
+++ b/docs/classes/ClassParser.md
@@ -44,7 +44,7 @@ The constructor type.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ The constructor type.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ The constructor type.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ The constructor type.
 
 #### Defined in
 
-[src/parsers/standard/class.ts:16](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/class.ts#L16)
+[src/parsers/standard/class.ts:16](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/class.ts#L16)
 
 ## Methods
 
@@ -110,7 +110,7 @@ The current ClassParser instance.
 
 #### Defined in
 
-[src/parsers/standard/class.ts:40](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/class.ts#L40)
+[src/parsers/standard/class.ts:40](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/class.ts#L40)
 
 ***
 
@@ -138,13 +138,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -156,7 +156,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -166,7 +166,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -188,7 +188,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -216,7 +216,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -238,7 +238,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -262,7 +262,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -284,7 +284,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -308,7 +308,7 @@ The current ClassParser instance.
 
 #### Defined in
 
-[src/parsers/standard/class.ts:50](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/class.ts#L50)
+[src/parsers/standard/class.ts:50](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/class.ts#L50)
 
 ***
 
@@ -330,7 +330,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -362,7 +362,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -390,7 +390,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -418,7 +418,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -446,7 +446,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -468,7 +468,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -496,4 +496,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/CustomParser.md b/docs/classes/CustomParser.md
index cedcfc1..58065f0 100644
--- a/docs/classes/CustomParser.md
+++ b/docs/classes/CustomParser.md
@@ -42,7 +42,7 @@ The custom parsing function.
 
 #### Defined in
 
-[src/parsers/advance/custom.ts:15](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/custom.ts#L15)
+[src/parsers/advance/custom.ts:15](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/custom.ts#L15)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The custom parsing function.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The custom parsing function.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The custom parsing function.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The custom parsing function.
 
 #### Defined in
 
-[src/parsers/advance/custom.ts:9](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/custom.ts#L9)
+[src/parsers/advance/custom.ts:9](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/custom.ts#L9)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -294,7 +294,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -326,7 +326,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -354,7 +354,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -382,7 +382,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -410,7 +410,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -432,7 +432,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -460,4 +460,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/EnumParser.md b/docs/classes/EnumParser.md
index 5bc375e..d594acf 100644
--- a/docs/classes/EnumParser.md
+++ b/docs/classes/EnumParser.md
@@ -42,7 +42,7 @@ The parsers for enum values.
 
 #### Defined in
 
-[src/parsers/advance/enum.ts:14](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/enum.ts#L14)
+[src/parsers/advance/enum.ts:14](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/enum.ts#L14)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The parsers for enum values.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The parsers for enum values.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The parsers for enum values.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The parsers for enum values.
 
 #### Defined in
 
-[src/parsers/advance/union.ts:13](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/union.ts#L13)
+[src/parsers/advance/union.ts:13](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/union.ts#L13)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
+> **default**(`value`): [`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
+[`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parsers/advance/union.ts:29](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/union.ts#L29)
+[src/parsers/advance/union.ts:29](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/union.ts#L29)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -294,7 +294,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -326,7 +326,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -354,7 +354,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -382,7 +382,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -410,7 +410,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -432,7 +432,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -460,4 +460,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/FunctionParser.md b/docs/classes/FunctionParser.md
index b827057..639d26a 100644
--- a/docs/classes/FunctionParser.md
+++ b/docs/classes/FunctionParser.md
@@ -44,7 +44,7 @@ The function type.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ The function type.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ The function type.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ The function type.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:26](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L26)
+[src/parsers/standard/function.ts:26](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L26)
 
 ## Methods
 
@@ -110,7 +110,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:83](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L83)
+[src/parsers/standard/function.ts:83](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L83)
 
 ***
 
@@ -134,7 +134,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:63](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L63)
+[src/parsers/standard/function.ts:63](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L63)
 
 ***
 
@@ -158,7 +158,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:53](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L53)
+[src/parsers/standard/function.ts:53](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L53)
 
 ***
 
@@ -186,7 +186,7 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
@@ -210,13 +210,13 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:103](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L103)
+[src/parsers/standard/function.ts:103](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L103)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -228,7 +228,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -238,7 +238,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -260,7 +260,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -288,7 +288,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -310,7 +310,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -334,7 +334,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -358,7 +358,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:73](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L73)
+[src/parsers/standard/function.ts:73](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L73)
 
 ***
 
@@ -380,7 +380,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -404,7 +404,7 @@ The current FunctionParser instance.
 
 #### Defined in
 
-[src/parsers/standard/function.ts:93](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/standard/function.ts#L93)
+[src/parsers/standard/function.ts:93](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/standard/function.ts#L93)
 
 ***
 
@@ -426,7 +426,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -458,7 +458,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -486,7 +486,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -514,7 +514,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -542,7 +542,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -564,7 +564,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -592,4 +592,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/IntersectionParser.md b/docs/classes/IntersectionParser.md
index d06af91..bc6c0e3 100644
--- a/docs/classes/IntersectionParser.md
+++ b/docs/classes/IntersectionParser.md
@@ -42,7 +42,7 @@ The parsers to intersect.
 
 #### Defined in
 
-[src/parsers/advance/intersection.ts:24](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/intersection.ts#L24)
+[src/parsers/advance/intersection.ts:24](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/intersection.ts#L24)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The parsers to intersect.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The parsers to intersect.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The parsers to intersect.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The parsers to intersect.
 
 #### Defined in
 
-[src/parsers/advance/intersection.ts:18](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/intersection.ts#L18)
+[src/parsers/advance/intersection.ts:18](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/intersection.ts#L18)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `IntersectionFromArray`\<`T`\>\>
+> **default**(`value`): [`Parser`](Parser.md)\<`IntersectionFromArray`\<`T`\>\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `IntersectionFromArray`\<`T`\>\>
+[`Parser`](Parser.md)\<`IntersectionFromArray`\<`T`\>\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parsers/advance/intersection.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/intersection.ts#L34)
+[src/parsers/advance/intersection.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/intersection.ts#L34)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -294,7 +294,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -326,7 +326,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -354,7 +354,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -382,7 +382,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -410,7 +410,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -432,7 +432,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -460,4 +460,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/LiteralParser.md b/docs/classes/LiteralParser.md
index b9f7ac0..ebf18ea 100644
--- a/docs/classes/LiteralParser.md
+++ b/docs/classes/LiteralParser.md
@@ -42,7 +42,7 @@ The literal value to parse.
 
 #### Defined in
 
-[src/parsers/advance/literal.ts:15](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/literal.ts#L15)
+[src/parsers/advance/literal.ts:15](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/literal.ts#L15)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The literal value to parse.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The literal value to parse.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The literal value to parse.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The literal value to parse.
 
 #### Defined in
 
-[src/parsers/advance/literal.ts:9](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/literal.ts#L9)
+[src/parsers/advance/literal.ts:9](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/literal.ts#L9)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -294,7 +294,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -326,7 +326,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -354,7 +354,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -382,7 +382,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -410,7 +410,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -432,7 +432,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -460,4 +460,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/NeverParser.md b/docs/classes/NeverParser.md
index 18d1f4c..32541bc 100644
--- a/docs/classes/NeverParser.md
+++ b/docs/classes/NeverParser.md
@@ -38,7 +38,7 @@ Parser for never values.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -52,7 +52,7 @@ Parser for never values.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -66,7 +66,7 @@ Parser for never values.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -80,7 +80,7 @@ Parser for never values.
 
 #### Defined in
 
-[src/parsers/never.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/never.ts#L8)
+[src/parsers/never.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/never.ts#L8)
 
 ## Methods
 
@@ -108,13 +108,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`never`\>
 
 Sets a default value for the parser.
 
@@ -126,7 +126,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined`\>
+[`Parser`](Parser.md)\<`never`\>
 
 The current Parser instance.
 
@@ -136,7 +136,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -158,7 +158,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -186,7 +186,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -208,7 +208,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -232,7 +232,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -254,7 +254,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -276,7 +276,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -308,7 +308,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -336,7 +336,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -364,7 +364,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -392,7 +392,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -414,7 +414,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -442,4 +442,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/NullParser.md b/docs/classes/NullParser.md
index 0f80ac6..9fe852b 100644
--- a/docs/classes/NullParser.md
+++ b/docs/classes/NullParser.md
@@ -30,7 +30,7 @@ Creates a new instance of NullParser.
 
 #### Defined in
 
-[src/parsers/null.ts:13](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/null.ts#L13)
+[src/parsers/null.ts:13](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/null.ts#L13)
 
 ## Properties
 
@@ -44,7 +44,7 @@ Creates a new instance of NullParser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ Creates a new instance of NullParser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ Creates a new instance of NullParser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ Creates a new instance of NullParser.
 
 #### Defined in
 
-[src/parsers/null.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/null.ts#L8)
+[src/parsers/null.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/null.ts#L8)
 
 ## Methods
 
@@ -114,13 +114,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `null`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`null`\>
 
 Sets a default value for the parser.
 
@@ -132,7 +132,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `null`\>
+[`Parser`](Parser.md)\<`null`\>
 
 The current Parser instance.
 
@@ -142,7 +142,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -164,7 +164,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -192,7 +192,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -214,7 +214,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -238,7 +238,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -260,7 +260,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -282,7 +282,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -314,7 +314,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -342,7 +342,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -370,7 +370,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -398,7 +398,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -420,7 +420,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -448,4 +448,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/NumberParser.md b/docs/classes/NumberParser.md
index 75991f3..3381f3b 100644
--- a/docs/classes/NumberParser.md
+++ b/docs/classes/NumberParser.md
@@ -30,7 +30,7 @@ Creates a new instance of NumberParser.
 
 #### Defined in
 
-[src/parsers/number.ts:73](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L73)
+[src/parsers/number.ts:73](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L73)
 
 ## Properties
 
@@ -44,7 +44,7 @@ Creates a new instance of NumberParser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ Creates a new instance of NumberParser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ Creates a new instance of NumberParser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ Creates a new instance of NumberParser.
 
 #### Defined in
 
-[src/parsers/number.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L44)
+[src/parsers/number.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L44)
 
 ## Methods
 
@@ -114,13 +114,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `number`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`number`\>
 
 Sets a default value for the parser.
 
@@ -132,7 +132,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `number`\>
+[`Parser`](Parser.md)\<`number`\>
 
 The current Parser instance.
 
@@ -142,7 +142,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -164,7 +164,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -192,7 +192,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -214,7 +214,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -238,7 +238,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -256,7 +256,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:139](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L139)
+[src/parsers/number.ts:139](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L139)
 
 ***
 
@@ -274,7 +274,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:120](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L120)
+[src/parsers/number.ts:120](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L120)
 
 ***
 
@@ -296,7 +296,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -324,7 +324,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:84](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L84)
+[src/parsers/number.ts:84](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L84)
 
 ***
 
@@ -352,7 +352,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:97](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L97)
+[src/parsers/number.ts:97](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L97)
 
 ***
 
@@ -376,7 +376,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:149](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L149)
+[src/parsers/number.ts:149](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L149)
 
 ***
 
@@ -394,7 +394,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:159](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L159)
+[src/parsers/number.ts:159](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L159)
 
 ***
 
@@ -412,7 +412,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:176](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L176)
+[src/parsers/number.ts:176](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L176)
 
 ***
 
@@ -430,7 +430,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:130](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L130)
+[src/parsers/number.ts:130](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L130)
 
 ***
 
@@ -452,7 +452,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -484,7 +484,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -512,7 +512,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -540,7 +540,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -558,7 +558,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:184](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L184)
+[src/parsers/number.ts:184](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L184)
 
 ***
 
@@ -576,7 +576,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:192](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L192)
+[src/parsers/number.ts:192](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L192)
 
 ***
 
@@ -594,7 +594,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:168](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L168)
+[src/parsers/number.ts:168](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L168)
 
 ***
 
@@ -630,7 +630,7 @@ The current NumberParser instance.
 
 #### Defined in
 
-[src/parsers/number.ts:112](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/number.ts#L112)
+[src/parsers/number.ts:112](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/number.ts#L112)
 
 ***
 
@@ -658,7 +658,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -680,7 +680,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -708,4 +708,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/ObjectParser.md b/docs/classes/ObjectParser.md
index fb25f24..af1943f 100644
--- a/docs/classes/ObjectParser.md
+++ b/docs/classes/ObjectParser.md
@@ -42,7 +42,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/parsers/object.ts:102](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L102)
+[src/parsers/object.ts:102](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L102)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -80,7 +80,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/parsers/object.ts:68](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L68)
+[src/parsers/object.ts:68](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L68)
 
 ***
 
@@ -94,7 +94,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -108,7 +108,7 @@ The configuration for the object parser.
 
 #### Defined in
 
-[src/parsers/object.ts:23](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L23)
+[src/parsers/object.ts:23](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L23)
 
 ## Methods
 
@@ -136,13 +136,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| [`ObjectParserInfer`](../type-aliases/ObjectParserInfer.md)\<`S`\>\>
+> **default**(`value`): [`Parser`](Parser.md)\<[`ObjectParserInfer`](../type-aliases/ObjectParserInfer.md)\<`S`\>\>
 
 Sets a default value for the parser.
 
@@ -154,7 +154,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| [`ObjectParserInfer`](../type-aliases/ObjectParserInfer.md)\<`S`\>\>
+[`Parser`](Parser.md)\<[`ObjectParserInfer`](../type-aliases/ObjectParserInfer.md)\<`S`\>\>
 
 The current Parser instance.
 
@@ -164,7 +164,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -186,7 +186,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:70](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L70)
+[src/parsers/object.ts:70](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L70)
 
 ***
 
@@ -214,7 +214,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -236,7 +236,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -260,7 +260,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -292,7 +292,7 @@ A new Parser instance for the indexed object.
 
 #### Defined in
 
-[src/parsers/object.ts:131](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L131)
+[src/parsers/object.ts:131](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L131)
 
 ***
 
@@ -316,7 +316,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:146](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L146)
+[src/parsers/object.ts:146](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L146)
 
 ***
 
@@ -338,7 +338,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -362,7 +362,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:156](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L156)
+[src/parsers/object.ts:156](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L156)
 
 ***
 
@@ -386,7 +386,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:167](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L167)
+[src/parsers/object.ts:167](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L167)
 
 ***
 
@@ -408,7 +408,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -440,7 +440,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -468,7 +468,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -496,7 +496,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -524,7 +524,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:179](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L179)
+[src/parsers/object.ts:179](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L179)
 
 ***
 
@@ -552,7 +552,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -574,7 +574,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -598,7 +598,7 @@ The current ObjectParser instance.
 
 #### Defined in
 
-[src/parsers/object.ts:115](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/object.ts#L115)
+[src/parsers/object.ts:115](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/object.ts#L115)
 
 ***
 
@@ -626,4 +626,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/Parser.md b/docs/classes/Parser.md
index 0deccf3..9cf27ad 100644
--- a/docs/classes/Parser.md
+++ b/docs/classes/Parser.md
@@ -61,7 +61,7 @@ Abstract base class for parsers.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -71,7 +71,7 @@ Abstract base class for parsers.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -85,7 +85,7 @@ Abstract base class for parsers.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -95,7 +95,7 @@ Abstract base class for parsers.
 
 #### Defined in
 
-[src/parser.ts:32](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L32)
+[src/parser.ts:32](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L32)
 
 ## Methods
 
@@ -123,13 +123,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `T`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`T`\>
 
 Sets a default value for the parser.
 
@@ -141,7 +141,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `T`\>
+[`Parser`](Parser.md)\<`T`\>
 
 The current Parser instance.
 
@@ -151,7 +151,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -169,7 +169,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -193,7 +193,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -211,7 +211,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -231,7 +231,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -253,7 +253,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -275,7 +275,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -307,7 +307,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -331,7 +331,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -359,7 +359,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -383,7 +383,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -401,7 +401,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -425,4 +425,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/StringParser.md b/docs/classes/StringParser.md
index a8cd74b..aa64d4b 100644
--- a/docs/classes/StringParser.md
+++ b/docs/classes/StringParser.md
@@ -30,7 +30,7 @@ Creates a new instance of StringParser.
 
 #### Defined in
 
-[src/parsers/string.ts:54](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L54)
+[src/parsers/string.ts:54](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L54)
 
 ## Properties
 
@@ -44,7 +44,7 @@ Creates a new instance of StringParser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -58,7 +58,7 @@ Creates a new instance of StringParser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -72,7 +72,7 @@ Creates a new instance of StringParser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -86,7 +86,7 @@ Creates a new instance of StringParser.
 
 #### Defined in
 
-[src/parsers/string.ts:30](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L30)
+[src/parsers/string.ts:30](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L30)
 
 ## Methods
 
@@ -114,13 +114,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| `string`\>
+> **default**(`value`): [`Parser`](Parser.md)\<`string`\>
 
 Sets a default value for the parser.
 
@@ -132,7 +132,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| `string`\>
+[`Parser`](Parser.md)\<`string`\>
 
 The current Parser instance.
 
@@ -142,7 +142,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -164,7 +164,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:24](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L24)
+[src/parsers/string.ts:24](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L24)
 
 ***
 
@@ -192,7 +192,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -210,7 +210,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:83](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L83)
+[src/parsers/string.ts:83](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L83)
 
 ***
 
@@ -228,7 +228,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:74](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L74)
+[src/parsers/string.ts:74](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L74)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -274,7 +274,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:112](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L112)
+[src/parsers/string.ts:112](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L112)
 
 ***
 
@@ -298,7 +298,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -320,7 +320,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -344,7 +344,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:122](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L122)
+[src/parsers/string.ts:122](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L122)
 
 ***
 
@@ -368,7 +368,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:133](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L133)
+[src/parsers/string.ts:133](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L133)
 
 ***
 
@@ -390,7 +390,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -422,7 +422,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -450,7 +450,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -478,7 +478,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -502,7 +502,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:64](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L64)
+[src/parsers/string.ts:64](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L64)
 
 ***
 
@@ -530,7 +530,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -552,7 +552,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -576,7 +576,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:102](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L102)
+[src/parsers/string.ts:102](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L102)
 
 ***
 
@@ -600,7 +600,7 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:144](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L144)
+[src/parsers/string.ts:144](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L144)
 
 ***
 
@@ -628,7 +628,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
 
 ***
 
@@ -646,4 +646,4 @@ The current StringParser instance.
 
 #### Defined in
 
-[src/parsers/string.ts:92](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/string.ts#L92)
+[src/parsers/string.ts:92](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/string.ts#L92)
diff --git a/docs/classes/TsuError.md b/docs/classes/TsuError.md
index e4a2e0d..bdcb377 100644
--- a/docs/classes/TsuError.md
+++ b/docs/classes/TsuError.md
@@ -34,7 +34,7 @@
 
 #### Defined in
 
-[src/utils/error.ts:18](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/error.ts#L18)
+[src/utils/error.ts:18](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/error.ts#L18)
 
 ## Properties
 
diff --git a/docs/classes/TupleParser.md b/docs/classes/TupleParser.md
index b795ee0..74d916d 100644
--- a/docs/classes/TupleParser.md
+++ b/docs/classes/TupleParser.md
@@ -42,7 +42,7 @@ The configuration for the tuple parser.
 
 #### Defined in
 
-[src/parsers/tuple.ts:36](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/tuple.ts#L36)
+[src/parsers/tuple.ts:36](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/tuple.ts#L36)
 
 ## Properties
 
@@ -56,7 +56,7 @@ The configuration for the tuple parser.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -70,7 +70,7 @@ The configuration for the tuple parser.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -84,7 +84,7 @@ The configuration for the tuple parser.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -98,7 +98,7 @@ The configuration for the tuple parser.
 
 #### Defined in
 
-[src/parsers/tuple.ts:11](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/tuple.ts#L11)
+[src/parsers/tuple.ts:11](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/tuple.ts#L11)
 
 ## Methods
 
@@ -126,13 +126,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| [`TupleParserInfer`](../type-aliases/TupleParserInfer.md)\<`S`\>\>
+> **default**(`value`): [`Parser`](Parser.md)\<[`TupleParserInfer`](../type-aliases/TupleParserInfer.md)\<`S`\>\>
 
 Sets a default value for the parser.
 
@@ -144,7 +144,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| [`TupleParserInfer`](../type-aliases/TupleParserInfer.md)\<`S`\>\>
+[`Parser`](Parser.md)\<[`TupleParserInfer`](../type-aliases/TupleParserInfer.md)\<`S`\>\>
 
 The current Parser instance.
 
@@ -154,7 +154,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -176,7 +176,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -204,7 +204,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -226,7 +226,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -250,7 +250,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -272,7 +272,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -294,7 +294,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -326,7 +326,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -354,7 +354,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -382,7 +382,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -410,7 +410,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -432,7 +432,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -460,4 +460,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/UndefinedParser.md b/docs/classes/UndefinedParser.md
index 2ffc843..a0ddcb7 100644
--- a/docs/classes/UndefinedParser.md
+++ b/docs/classes/UndefinedParser.md
@@ -38,7 +38,7 @@ Parser for undefined values.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -52,7 +52,7 @@ Parser for undefined values.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -66,7 +66,7 @@ Parser for undefined values.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -80,7 +80,7 @@ Parser for undefined values.
 
 #### Defined in
 
-[src/parsers/undefined.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/undefined.ts#L8)
+[src/parsers/undefined.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/undefined.ts#L8)
 
 ## Methods
 
@@ -108,7 +108,7 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
@@ -136,7 +136,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -158,7 +158,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -186,7 +186,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -208,7 +208,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -232,7 +232,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -254,7 +254,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -276,7 +276,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -308,7 +308,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -336,7 +336,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -364,7 +364,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -392,7 +392,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -414,7 +414,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -442,4 +442,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/UnionParser.md b/docs/classes/UnionParser.md
index 94895ab..2ee4313 100644
--- a/docs/classes/UnionParser.md
+++ b/docs/classes/UnionParser.md
@@ -46,7 +46,7 @@ The parsers to union.
 
 #### Defined in
 
-[src/parsers/advance/union.ts:19](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/union.ts#L19)
+[src/parsers/advance/union.ts:19](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/union.ts#L19)
 
 ## Properties
 
@@ -60,7 +60,7 @@ The parsers to union.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -74,7 +74,7 @@ The parsers to union.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -88,7 +88,7 @@ The parsers to union.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -102,7 +102,7 @@ The parsers to union.
 
 #### Defined in
 
-[src/parsers/advance/union.ts:13](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/union.ts#L13)
+[src/parsers/advance/union.ts:13](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/union.ts#L13)
 
 ## Methods
 
@@ -130,13 +130,13 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
 ### default()
 
-> **default**(`value`): [`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
+> **default**(`value`): [`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
 
 Sets a default value for the parser.
 
@@ -148,7 +148,7 @@ The default value.
 
 #### Returns
 
-[`Parser`](Parser.md)\<`undefined` \| [`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
+[`Parser`](Parser.md)\<[`ParserInfer`](../type-aliases/ParserInfer.md)\<`T`\[`number`\]\>\>
 
 The current Parser instance.
 
@@ -158,7 +158,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -180,7 +180,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parsers/advance/union.ts:29](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/advance/union.ts#L29)
+[src/parsers/advance/union.ts:29](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/advance/union.ts#L29)
 
 ***
 
@@ -208,7 +208,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -230,7 +230,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -254,7 +254,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -276,7 +276,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -298,7 +298,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -330,7 +330,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -358,7 +358,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -386,7 +386,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -414,7 +414,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -436,7 +436,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -464,4 +464,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/classes/UnknownParser.md b/docs/classes/UnknownParser.md
index 5df1aa4..999e046 100644
--- a/docs/classes/UnknownParser.md
+++ b/docs/classes/UnknownParser.md
@@ -38,7 +38,7 @@ Parser for unknown values.
 
 #### Defined in
 
-[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L49)
+[src/parser.ts:49](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L49)
 
 ***
 
@@ -52,7 +52,7 @@ Parser for unknown values.
 
 #### Defined in
 
-[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L44)
+[src/parser.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L44)
 
 ***
 
@@ -66,7 +66,7 @@ Parser for unknown values.
 
 #### Defined in
 
-[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L6)
+[src/utils/lang.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L6)
 
 ***
 
@@ -80,7 +80,7 @@ Parser for unknown values.
 
 #### Defined in
 
-[src/parsers/any.ts:11](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parsers/any.ts#L11)
+[src/parsers/any.ts:11](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parsers/any.ts#L11)
 
 ## Methods
 
@@ -108,7 +108,7 @@ True if the input is valid, false otherwise.
 
 #### Defined in
 
-[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L99)
+[src/parser.ts:99](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L99)
 
 ***
 
@@ -136,7 +136,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L118)
+[src/parser.ts:118](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L118)
 
 ***
 
@@ -158,7 +158,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L34)
+[src/parser.ts:34](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L34)
 
 ***
 
@@ -186,7 +186,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L138)
+[src/parser.ts:138](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L138)
 
 ***
 
@@ -208,7 +208,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L128)
+[src/parser.ts:128](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L128)
 
 ***
 
@@ -232,7 +232,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L39)
+[src/parser.ts:39](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L39)
 
 ***
 
@@ -254,7 +254,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/utils/lang.ts#L8)
+[src/utils/lang.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/utils/lang.ts#L8)
 
 ***
 
@@ -276,7 +276,7 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L107)
+[src/parser.ts:107](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L107)
 
 ***
 
@@ -308,7 +308,7 @@ If parsing fails.
 
 #### Defined in
 
-[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L61)
+[src/parser.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L61)
 
 ***
 
@@ -336,7 +336,7 @@ A promise that resolves with the parsed result or rejects with an error.
 
 #### Defined in
 
-[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L86)
+[src/parser.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L86)
 
 ***
 
@@ -364,7 +364,7 @@ An object containing the parsing result or error.
 
 #### Defined in
 
-[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L72)
+[src/parser.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L72)
 
 ***
 
@@ -392,7 +392,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L158)
+[src/parser.ts:158](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L158)
 
 ***
 
@@ -414,7 +414,7 @@ The generated JSON schema.
 
 #### Defined in
 
-[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L51)
+[src/parser.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L51)
 
 ***
 
@@ -442,4 +442,4 @@ The current Parser instance.
 
 #### Defined in
 
-[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/parser.ts#L148)
+[src/parser.ts:148](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/parser.ts#L148)
diff --git a/docs/functions/anyFactory.md b/docs/functions/anyFactory.md
index 709dc13..74eaef9 100644
--- a/docs/functions/anyFactory.md
+++ b/docs/functions/anyFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:44](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L44)
+[src/factory.ts:44](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L44)
diff --git a/docs/functions/arrayFactory.md b/docs/functions/arrayFactory.md
index f5f9208..47e499b 100644
--- a/docs/functions/arrayFactory.md
+++ b/docs/functions/arrayFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:56](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L56)
+[src/factory.ts:56](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L56)
diff --git a/docs/functions/booleanFactory.md b/docs/functions/booleanFactory.md
index c80a092..22a90a2 100644
--- a/docs/functions/booleanFactory.md
+++ b/docs/functions/booleanFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:32](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L32)
+[src/factory.ts:32](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L32)
diff --git a/docs/functions/classFactory.md b/docs/functions/classFactory.md
index 4fcfd7f..56f5f6a 100644
--- a/docs/functions/classFactory.md
+++ b/docs/functions/classFactory.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[src/factory.ts:94](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L94)
+[src/factory.ts:94](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L94)
diff --git a/docs/functions/customFactory.md b/docs/functions/customFactory.md
index a83543b..fe9e6e5 100644
--- a/docs/functions/customFactory.md
+++ b/docs/functions/customFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L86)
+[src/factory.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L86)
diff --git a/docs/functions/enumFactory.md b/docs/functions/enumFactory.md
index c45b8ea..bd05ec8 100644
--- a/docs/functions/enumFactory.md
+++ b/docs/functions/enumFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:82](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L82)
+[src/factory.ts:82](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L82)
diff --git a/docs/functions/functionFactory.md b/docs/functions/functionFactory.md
index f5be0f6..ff39c07 100644
--- a/docs/functions/functionFactory.md
+++ b/docs/functions/functionFactory.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[src/factory.ts:90](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L90)
+[src/factory.ts:90](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L90)
diff --git a/docs/functions/intersectionFactory.md b/docs/functions/intersectionFactory.md
index 7bf2d53..0b9ad98 100644
--- a/docs/functions/intersectionFactory.md
+++ b/docs/functions/intersectionFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:74](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L74)
+[src/factory.ts:74](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L74)
diff --git a/docs/functions/literalFactory.md b/docs/functions/literalFactory.md
index 6058286..ded78d0 100644
--- a/docs/functions/literalFactory.md
+++ b/docs/functions/literalFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:70](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L70)
+[src/factory.ts:70](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L70)
diff --git a/docs/functions/neverFactory.md b/docs/functions/neverFactory.md
index dabe782..c2dcdf1 100644
--- a/docs/functions/neverFactory.md
+++ b/docs/functions/neverFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:52](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L52)
+[src/factory.ts:52](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L52)
diff --git a/docs/functions/nullFactory.md b/docs/functions/nullFactory.md
index eae4a0e..1be4360 100644
--- a/docs/functions/nullFactory.md
+++ b/docs/functions/nullFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:40](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L40)
+[src/factory.ts:40](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L40)
diff --git a/docs/functions/numberFactory.md b/docs/functions/numberFactory.md
index 275a05c..68717d7 100644
--- a/docs/functions/numberFactory.md
+++ b/docs/functions/numberFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:24](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L24)
+[src/factory.ts:24](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L24)
diff --git a/docs/functions/objectFactory.md b/docs/functions/objectFactory.md
index bd0f215..887f7b5 100644
--- a/docs/functions/objectFactory.md
+++ b/docs/functions/objectFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:66](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L66)
+[src/factory.ts:66](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L66)
diff --git a/docs/functions/stringFactory.md b/docs/functions/stringFactory.md
index 794a193..4dd9f6e 100644
--- a/docs/functions/stringFactory.md
+++ b/docs/functions/stringFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:28](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L28)
+[src/factory.ts:28](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L28)
diff --git a/docs/functions/tsuFactory.md b/docs/functions/tsuFactory.md
index a993803..7ba484b 100644
--- a/docs/functions/tsuFactory.md
+++ b/docs/functions/tsuFactory.md
@@ -24,4 +24,4 @@ An object containing factory methods for various Tsu parsers.
 
 ## Defined in
 
-[src/index.ts:86](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L86)
+[src/index.ts:86](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L86)
diff --git a/docs/functions/tupleFactory.md b/docs/functions/tupleFactory.md
index 011934d..9acd378 100644
--- a/docs/functions/tupleFactory.md
+++ b/docs/functions/tupleFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:60](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L60)
+[src/factory.ts:60](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L60)
diff --git a/docs/functions/undefinedFactory.md b/docs/functions/undefinedFactory.md
index 29e95d3..4bed10a 100644
--- a/docs/functions/undefinedFactory.md
+++ b/docs/functions/undefinedFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:36](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L36)
+[src/factory.ts:36](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L36)
diff --git a/docs/functions/unionFactory.md b/docs/functions/unionFactory.md
index 8bc7197..9c12d0f 100644
--- a/docs/functions/unionFactory.md
+++ b/docs/functions/unionFactory.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/factory.ts:78](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L78)
+[src/factory.ts:78](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L78)
diff --git a/docs/functions/unknownFactory.md b/docs/functions/unknownFactory.md
index 86f1348..0454e81 100644
--- a/docs/functions/unknownFactory.md
+++ b/docs/functions/unknownFactory.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/factory.ts:48](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/factory.ts#L48)
+[src/factory.ts:48](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/factory.ts#L48)
diff --git a/docs/interfaces/ParserImpl.md b/docs/interfaces/ParserImpl.md
index 0652df6..988ae26 100644
--- a/docs/interfaces/ParserImpl.md
+++ b/docs/interfaces/ParserImpl.md
@@ -18,7 +18,7 @@
 
 #### Defined in
 
-[src/types.ts:17](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L17)
+[src/types.ts:17](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L17)
 
 ***
 
@@ -36,7 +36,7 @@
 
 #### Defined in
 
-[src/types.ts:19](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L19)
+[src/types.ts:19](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L19)
 
 ***
 
@@ -50,7 +50,7 @@
 
 #### Defined in
 
-[src/types.ts:18](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L18)
+[src/types.ts:18](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L18)
 
 ***
 
@@ -60,7 +60,7 @@
 
 #### Defined in
 
-[src/types.ts:15](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L15)
+[src/types.ts:15](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L15)
 
 ***
 
@@ -70,4 +70,4 @@
 
 #### Defined in
 
-[src/types.ts:16](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L16)
+[src/types.ts:16](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L16)
diff --git a/docs/interfaces/SchemaMetadata.md b/docs/interfaces/SchemaMetadata.md
index 2700fce..9d020fb 100644
--- a/docs/interfaces/SchemaMetadata.md
+++ b/docs/interfaces/SchemaMetadata.md
@@ -14,7 +14,7 @@
 
 #### Defined in
 
-[src/types.ts:71](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L71)
+[src/types.ts:71](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L71)
 
 ***
 
@@ -24,7 +24,7 @@
 
 #### Defined in
 
-[src/types.ts:54](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L54)
+[src/types.ts:54](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L54)
 
 ***
 
@@ -34,7 +34,7 @@
 
 #### Defined in
 
-[src/types.ts:55](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L55)
+[src/types.ts:55](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L55)
 
 ***
 
@@ -44,7 +44,7 @@
 
 #### Defined in
 
-[src/types.ts:62](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L62)
+[src/types.ts:62](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L62)
 
 ***
 
@@ -54,7 +54,7 @@
 
 #### Defined in
 
-[src/types.ts:64](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L64)
+[src/types.ts:64](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L64)
 
 ***
 
@@ -64,7 +64,7 @@
 
 #### Defined in
 
-[src/types.ts:67](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L67)
+[src/types.ts:67](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L67)
 
 ***
 
@@ -74,7 +74,7 @@
 
 #### Defined in
 
-[src/types.ts:68](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L68)
+[src/types.ts:68](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L68)
 
 ***
 
@@ -84,7 +84,7 @@
 
 #### Defined in
 
-[src/types.ts:58](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L58)
+[src/types.ts:58](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L58)
 
 ***
 
@@ -94,7 +94,7 @@
 
 #### Defined in
 
-[src/types.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L72)
+[src/types.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L72)
 
 ***
 
@@ -104,7 +104,7 @@
 
 #### Defined in
 
-[src/types.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L61)
+[src/types.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L61)
 
 ***
 
@@ -114,7 +114,7 @@
 
 #### Defined in
 
-[src/types.ts:69](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L69)
+[src/types.ts:69](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L69)
 
 ***
 
@@ -124,7 +124,7 @@
 
 #### Defined in
 
-[src/types.ts:59](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L59)
+[src/types.ts:59](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L59)
 
 ***
 
@@ -134,7 +134,7 @@
 
 #### Defined in
 
-[src/types.ts:73](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L73)
+[src/types.ts:73](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L73)
 
 ***
 
@@ -144,7 +144,7 @@
 
 #### Defined in
 
-[src/types.ts:63](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L63)
+[src/types.ts:63](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L63)
 
 ***
 
@@ -154,7 +154,7 @@
 
 #### Defined in
 
-[src/types.ts:65](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L65)
+[src/types.ts:65](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L65)
 
 ***
 
@@ -164,7 +164,7 @@
 
 #### Defined in
 
-[src/types.ts:52](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L52)
+[src/types.ts:52](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L52)
 
 ***
 
@@ -174,7 +174,7 @@
 
 #### Defined in
 
-[src/types.ts:57](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L57)
+[src/types.ts:57](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L57)
 
 ***
 
@@ -184,7 +184,7 @@
 
 #### Defined in
 
-[src/types.ts:53](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L53)
+[src/types.ts:53](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L53)
 
 ***
 
@@ -194,4 +194,4 @@
 
 #### Defined in
 
-[src/types.ts:51](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L51)
+[src/types.ts:51](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L51)
diff --git a/docs/namespaces/Tsu/functions/Any.md b/docs/namespaces/Tsu/functions/Any.md
index 83f7de1..14a9aa0 100644
--- a/docs/namespaces/Tsu/functions/Any.md
+++ b/docs/namespaces/Tsu/functions/Any.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:60](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L60)
+[src/index.ts:60](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L60)
diff --git a/docs/namespaces/Tsu/functions/Array.md b/docs/namespaces/Tsu/functions/Array.md
index 1d20875..ffcbf1b 100644
--- a/docs/namespaces/Tsu/functions/Array.md
+++ b/docs/namespaces/Tsu/functions/Array.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:64](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L64)
+[src/index.ts:64](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L64)
diff --git a/docs/namespaces/Tsu/functions/Boolean.md b/docs/namespaces/Tsu/functions/Boolean.md
index 6e7ad42..03ffe64 100644
--- a/docs/namespaces/Tsu/functions/Boolean.md
+++ b/docs/namespaces/Tsu/functions/Boolean.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:57](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L57)
+[src/index.ts:57](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L57)
diff --git a/docs/namespaces/Tsu/functions/Class.md b/docs/namespaces/Tsu/functions/Class.md
index 2e67df3..ce82420 100644
--- a/docs/namespaces/Tsu/functions/Class.md
+++ b/docs/namespaces/Tsu/functions/Class.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[src/index.ts:75](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L75)
+[src/index.ts:75](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L75)
diff --git a/docs/namespaces/Tsu/functions/Custom.md b/docs/namespaces/Tsu/functions/Custom.md
index a2f3a63..526ef59 100644
--- a/docs/namespaces/Tsu/functions/Custom.md
+++ b/docs/namespaces/Tsu/functions/Custom.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:72](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L72)
+[src/index.ts:72](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L72)
diff --git a/docs/namespaces/Tsu/functions/Enum.md b/docs/namespaces/Tsu/functions/Enum.md
index 41f0867..5400957 100644
--- a/docs/namespaces/Tsu/functions/Enum.md
+++ b/docs/namespaces/Tsu/functions/Enum.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:71](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L71)
+[src/index.ts:71](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L71)
diff --git a/docs/namespaces/Tsu/functions/Function.md b/docs/namespaces/Tsu/functions/Function.md
index d68db88..95fd3fa 100644
--- a/docs/namespaces/Tsu/functions/Function.md
+++ b/docs/namespaces/Tsu/functions/Function.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[src/index.ts:74](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L74)
+[src/index.ts:74](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L74)
diff --git a/docs/namespaces/Tsu/functions/Intersection.md b/docs/namespaces/Tsu/functions/Intersection.md
index a4f810f..5e968bc 100644
--- a/docs/namespaces/Tsu/functions/Intersection.md
+++ b/docs/namespaces/Tsu/functions/Intersection.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:69](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L69)
+[src/index.ts:69](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L69)
diff --git a/docs/namespaces/Tsu/functions/Literal.md b/docs/namespaces/Tsu/functions/Literal.md
index 7c272aa..387299c 100644
--- a/docs/namespaces/Tsu/functions/Literal.md
+++ b/docs/namespaces/Tsu/functions/Literal.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:68](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L68)
+[src/index.ts:68](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L68)
diff --git a/docs/namespaces/Tsu/functions/Never.md b/docs/namespaces/Tsu/functions/Never.md
index db66b58..2f8e5cf 100644
--- a/docs/namespaces/Tsu/functions/Never.md
+++ b/docs/namespaces/Tsu/functions/Never.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:62](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L62)
+[src/index.ts:62](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L62)
diff --git a/docs/namespaces/Tsu/functions/Null.md b/docs/namespaces/Tsu/functions/Null.md
index 342c91a..dd74934 100644
--- a/docs/namespaces/Tsu/functions/Null.md
+++ b/docs/namespaces/Tsu/functions/Null.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:58](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L58)
+[src/index.ts:58](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L58)
diff --git a/docs/namespaces/Tsu/functions/Number.md b/docs/namespaces/Tsu/functions/Number.md
index db925ed..47876d0 100644
--- a/docs/namespaces/Tsu/functions/Number.md
+++ b/docs/namespaces/Tsu/functions/Number.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:53](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L53)
+[src/index.ts:53](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L53)
diff --git a/docs/namespaces/Tsu/functions/Object.md b/docs/namespaces/Tsu/functions/Object.md
index 9d9b3ee..3ddcf1b 100644
--- a/docs/namespaces/Tsu/functions/Object.md
+++ b/docs/namespaces/Tsu/functions/Object.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:67](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L67)
+[src/index.ts:67](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L67)
diff --git a/docs/namespaces/Tsu/functions/String.md b/docs/namespaces/Tsu/functions/String.md
index 44c3494..37eb0fe 100644
--- a/docs/namespaces/Tsu/functions/String.md
+++ b/docs/namespaces/Tsu/functions/String.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:55](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L55)
+[src/index.ts:55](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L55)
diff --git a/docs/namespaces/Tsu/functions/Tuple.md b/docs/namespaces/Tsu/functions/Tuple.md
index 730178a..096cdd5 100644
--- a/docs/namespaces/Tsu/functions/Tuple.md
+++ b/docs/namespaces/Tsu/functions/Tuple.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:65](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L65)
+[src/index.ts:65](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L65)
diff --git a/docs/namespaces/Tsu/functions/Undefined.md b/docs/namespaces/Tsu/functions/Undefined.md
index 8dbf0fe..42c993f 100644
--- a/docs/namespaces/Tsu/functions/Undefined.md
+++ b/docs/namespaces/Tsu/functions/Undefined.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:59](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L59)
+[src/index.ts:59](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L59)
diff --git a/docs/namespaces/Tsu/functions/Union.md b/docs/namespaces/Tsu/functions/Union.md
index 5a6af41..b699a7a 100644
--- a/docs/namespaces/Tsu/functions/Union.md
+++ b/docs/namespaces/Tsu/functions/Union.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/index.ts:70](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L70)
+[src/index.ts:70](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L70)
diff --git a/docs/namespaces/Tsu/functions/Unknown.md b/docs/namespaces/Tsu/functions/Unknown.md
index 1e76b4a..2efbd83 100644
--- a/docs/namespaces/Tsu/functions/Unknown.md
+++ b/docs/namespaces/Tsu/functions/Unknown.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:61](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L61)
+[src/index.ts:61](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L61)
diff --git a/docs/namespaces/Tsu/type-aliases/infer.md b/docs/namespaces/Tsu/type-aliases/infer.md
index 2fb63e8..2ad3b31 100644
--- a/docs/namespaces/Tsu/type-aliases/infer.md
+++ b/docs/namespaces/Tsu/type-aliases/infer.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:76](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L76)
+[src/index.ts:76](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L76)
diff --git a/docs/namespaces/Tsu/type-aliases/inferObject.md b/docs/namespaces/Tsu/type-aliases/inferObject.md
index 4480b95..d24d8b3 100644
--- a/docs/namespaces/Tsu/type-aliases/inferObject.md
+++ b/docs/namespaces/Tsu/type-aliases/inferObject.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:77](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L77)
+[src/index.ts:77](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L77)
diff --git a/docs/namespaces/Tsu/type-aliases/inferTuple.md b/docs/namespaces/Tsu/type-aliases/inferTuple.md
index ddd74f9..9ccc385 100644
--- a/docs/namespaces/Tsu/type-aliases/inferTuple.md
+++ b/docs/namespaces/Tsu/type-aliases/inferTuple.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/index.ts:78](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/index.ts#L78)
+[src/index.ts:78](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/index.ts#L78)
diff --git a/docs/type-aliases/Constructor.md b/docs/type-aliases/Constructor.md
index 57a10f3..ce2575d 100644
--- a/docs/type-aliases/Constructor.md
+++ b/docs/type-aliases/Constructor.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[src/types.ts:6](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L6)
+[src/types.ts:6](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L6)
diff --git a/docs/type-aliases/GetParserClassType.md b/docs/type-aliases/GetParserClassType.md
index ad2769a..ac47c7b 100644
--- a/docs/type-aliases/GetParserClassType.md
+++ b/docs/type-aliases/GetParserClassType.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/types.ts:9](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L9)
+[src/types.ts:9](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L9)
diff --git a/docs/type-aliases/IonParserConfig.md b/docs/type-aliases/IonParserConfig.md
index 7116d49..c056080 100644
--- a/docs/type-aliases/IonParserConfig.md
+++ b/docs/type-aliases/IonParserConfig.md
@@ -10,4 +10,4 @@
 
 ## Defined in
 
-[src/types.ts:36](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L36)
+[src/types.ts:36](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L36)
diff --git a/docs/type-aliases/JsonSchema.md b/docs/type-aliases/JsonSchema.md
index f3afa70..11b4ca9 100644
--- a/docs/type-aliases/JsonSchema.md
+++ b/docs/type-aliases/JsonSchema.md
@@ -16,4 +16,4 @@
 
 ## Defined in
 
-[src/types.ts:48](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L48)
+[src/types.ts:48](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L48)
diff --git a/docs/type-aliases/Langs.md b/docs/type-aliases/Langs.md
index 06456f5..3ec211d 100644
--- a/docs/type-aliases/Langs.md
+++ b/docs/type-aliases/Langs.md
@@ -10,4 +10,4 @@
 
 ## Defined in
 
-[src/types.ts:38](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L38)
+[src/types.ts:38](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L38)
diff --git a/docs/type-aliases/ObjectParserInfer.md b/docs/type-aliases/ObjectParserInfer.md
index 0808186..4b7242d 100644
--- a/docs/type-aliases/ObjectParserInfer.md
+++ b/docs/type-aliases/ObjectParserInfer.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/types.ts:26](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L26)
+[src/types.ts:26](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L26)
diff --git a/docs/type-aliases/ParserFunction.md b/docs/type-aliases/ParserFunction.md
index bf25fd4..175dce3 100644
--- a/docs/type-aliases/ParserFunction.md
+++ b/docs/type-aliases/ParserFunction.md
@@ -22,4 +22,4 @@
 
 ## Defined in
 
-[src/types.ts:11](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L11)
+[src/types.ts:11](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L11)
diff --git a/docs/type-aliases/ParserInfer.md b/docs/type-aliases/ParserInfer.md
index ac06a15..306dd7e 100644
--- a/docs/type-aliases/ParserInfer.md
+++ b/docs/type-aliases/ParserInfer.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/types.ts:8](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L8)
+[src/types.ts:8](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L8)
diff --git a/docs/type-aliases/ParserSafeReturn.md b/docs/type-aliases/ParserSafeReturn.md
index ef1495b..d0e9189 100644
--- a/docs/type-aliases/ParserSafeReturn.md
+++ b/docs/type-aliases/ParserSafeReturn.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/types.ts:12](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L12)
+[src/types.ts:12](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L12)
diff --git a/docs/type-aliases/TupleParserConfig.md b/docs/type-aliases/TupleParserConfig.md
index c4bd30a..ed1dedf 100644
--- a/docs/type-aliases/TupleParserConfig.md
+++ b/docs/type-aliases/TupleParserConfig.md
@@ -10,4 +10,4 @@
 
 ## Defined in
 
-[src/types.ts:30](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L30)
+[src/types.ts:30](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L30)
diff --git a/docs/type-aliases/TupleParserInfer.md b/docs/type-aliases/TupleParserInfer.md
index a46f0d4..5895322 100644
--- a/docs/type-aliases/TupleParserInfer.md
+++ b/docs/type-aliases/TupleParserInfer.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[src/types.ts:32](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L32)
+[src/types.ts:32](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L32)
diff --git a/docs/type-aliases/langType.md b/docs/type-aliases/langType.md
index 3bef70e..90408e5 100644
--- a/docs/type-aliases/langType.md
+++ b/docs/type-aliases/langType.md
@@ -10,4 +10,4 @@
 
 ## Defined in
 
-[src/types.ts:40](https://github.com/BIYUEHU/tsukiko/blob/eb4b04a16e9c40909bed9d6503bd49914851f300/src/types.ts#L40)
+[src/types.ts:40](https://github.com/BIYUEHU/tsukiko/blob/aa7a414bb89555b3910dd9d229f505891bded4ee/src/types.ts#L40)
diff --git a/package.json b/package.json
index db33a36..c1ef8c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tsukiko",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Dynamic Types Cheker At Runtime Which Develop",
   "main": "dist/index.js",
   "scripts": {