Bitwise NOT operator

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- The bitwise NOT operation (`~`): PR [#337](https://github.com/tact-lang/tact/pull/337)
 - Augmented assignment bitwise operators `|=`, `&=`, `^=`: PR [#350](https://github.com/tact-lang/tact/pull/350)
 - Traversing maps from contract storage and structs is now allowed: PR [#389](https://github.com/tact-lang/tact/pull/389)
 

src/generator/writers/writeExpression.ts

@@ -453,6 +453,10 @@ export function writeExpression(f: ASTExpression, ctx: WriterContext): string {
             return "(~ " + writeExpression(f.right, ctx) + ")";
         }
 
+        if (f.op === "~") {
+            return "(~ " + writeExpression(f.right, ctx) + ")";
+        }
+
         if (f.op === "-") {
             return "(- " + writeExpression(f.right, ctx) + ")";
         }

src/grammar/ast.ts

@@ -153,7 +153,7 @@ export type ASTOpBinary = {
     ref: ASTRef;
 };
 
-export type ASTUnaryOperation = "+" | "-" | "!" | "!!";
+export type ASTUnaryOperation = "+" | "-" | "!" | "!!" | "~";
 
 export type ASTOpUnary = {
     kind: "op_unary";

src/grammar/grammar.ohm

@@ -174,6 +174,7 @@ Tact {
     ExpressionUnary = "-" ExpressionUnary --minus
                     | "+" ExpressionUnary --plus
                     | "!" ExpressionUnary --not
+                    | "~" ExpressionUnary --bitwiseNot
                     | ExpressionPrimary
 
     // Order is important

src/grammar/grammar.ts

@@ -1095,6 +1095,14 @@ semantics.addOperation<ASTNode>("astOfExpression", {
             ref: createRef(this),
         });
     },
+    ExpressionUnary_bitwiseNot(_tilde, operand) {
+        return createNode({
+            kind: "op_unary",
+            op: "~",
+            right: operand.astOfExpression(),
+            ref: createRef(this),
+        });
+    },
     ExpressionParens(_lparen, expression, _rparen) {
         return expression.astOfExpression();
     },

src/test/__snapshots__/feature-constants.spec.ts.snap

@@ -265,6 +265,16 @@ ConstantTester {
           "type": "int",
         },
       },
+      {
+        "arguments": [],
+        "name": "something20",
+        "returnType": {
+          "format": 257,
+          "kind": "simple",
+          "optional": false,
+          "type": "int",
+        },
+      },
       {
         "arguments": [],
         "name": "minInt1",
@@ -442,7 +452,7 @@ ConstantTester {
       },
     ],
   },
-  "address": kQBLPCFB6hZTJVoIVoSLp-zwDPnb5aQG3LnI_S3IHwDre99T,
+  "address": kQC0jy5E0g2P09qLQNz8948lt5CqpJwDVKDhilWC_jJpsHMo,
   "init": {
     "code": x{FF00F4A413F4BCF2C80B}
  x{62_}
@@ -508,10 +518,15 @@ ConstantTester {
         x{85FF}
      x{2_}
       x{5}
-       x{A975DB3CDB3C31}
-        x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
-         x{6D}
-        x{7A}
+       x{2_}
+        x{A6EBB679B67863_}
+         x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
+          x{6D}
+         x{7A}
+        x{A6A9B679B67863_}
+         x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
+          x{6D}
+         x{80FA}
        x{AAA2DB3CDB3C31}
         x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
          x{6D}
@@ -546,7 +561,7 @@ ConstantTester {
          x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
           x{6D}
          x{800B}
-        x{AEE3435697066733A2F2F516D5952584D7874336E78397331376A3874474D64315751526D574D6A556764756E75365536685A4C764758627182_}
+        x{AEE3435697066733A2F2F516D665575695850684879515A4C34525831794B71716D7243473374424E7572564E736A39463957696B4D48655182_}
        x{AA45DB3CDB3C31}
         x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
          x{6D}
@@ -637,10 +652,15 @@ ConstantTester {
            x{85FF}
         x{2_}
          x{5}
-          x{A975DB3CDB3C31}
-           x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
-            x{6D}
-           x{7A}
+          x{2_}
+           x{A6EBB679B67863_}
+            x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
+             x{6D}
+            x{7A}
+           x{A6A9B679B67863_}
+            x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
+             x{6D}
+            x{80FA}
           x{AAA2DB3CDB3C31}
            x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
             x{6D}
@@ -675,7 +695,7 @@ ConstantTester {
             x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
              x{6D}
             x{800B}
-           x{AEE3435697066733A2F2F516D5952584D7874336E78397331376A3874474D64315751526D574D6A556764756E75365536685A4C764758627182_}
+           x{AEE3435697066733A2F2F516D665575695850684879515A4C34525831794B71716D7243473374424E7572564E736A39463957696B4D48655182_}
           x{AA45DB3CDB3C31}
            x{ED44D0D401F863D20030916DE0F828D70B0A8309BAF2E089DB3C}
             x{6D}

src/test/feature-constants.spec.ts

@@ -51,6 +51,7 @@ describe("feature-constants", () => {
         expect(await contract.getMinInt1()).toEqual(
             -115792089237316195423570985008687907853269984665640564039457584007913129639936n,
         );
+        expect(await contract.getSomething20()).toEqual(-6n);
         expect(await contract.getGlobalConst()).toEqual(100n);
     });
 });

src/test/feature-math.spec.ts

@@ -51,6 +51,9 @@ describe("feature-math", () => {
         expect(await contract.getXor(2n, -3n)).toBe(-1n);
         expect(await contract.getXor(-2n, 3n)).toBe(-3n);
         expect(await contract.getXor(-2n, -3n)).toBe(3n);
+        expect(await contract.getBitwiseNot(2n)).toBe(-3n);
+        expect(await contract.getBitwiseNot(-2n)).toBe(1n);
+        expect(await contract.getBitwiseNot(6n)).toBe(-7n);
 
         // Augmented Assign
         expect(await contract.getAddAug(1n, 2n)).toBe(3n);
@@ -464,5 +467,11 @@ describe("feature-math", () => {
         expect(await contract.getPrecedence10()).toBe(3n);
         expect(await contract.getPrecedence11()).toBe(3n);
         expect(await contract.getPrecedence12()).toBe(5n);
+
+        // Test multiple unary operations in a row
+        expect(await contract.getBitwiseNot1(5n)).toBe(5n);
+        expect(await contract.getBitwiseNot2(5n)).toBe(-6n);
+        expect(await contract.getBitwiseNot3(5n)).toBe(4n);
+        expect(await contract.getBitwiseNot4(5n)).toBe(6n);
     });
 });

src/test/features/constants.tact

@@ -20,6 +20,7 @@ contract ConstantTester {
     const something17: Int = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
     const something18: Int = -(pow2(255) - 1 + pow2(255));
     const something19: Int = -(pow2(255) - 1 + pow2(255)) - 1;
+    const something20: Int = ~5;
 
     init() {
 
@@ -104,6 +105,10 @@ contract ConstantTester {
     get fun something19(): Int {
         return self.something19;
     }
+
+    get fun something20(): Int {
+        return self.something20;
+    }
 
     get fun minInt1(): Int {
         return -115792089237316195423570985008687907853269984665640564039457584007913129639936;

src/test/features/math.tact

@@ -44,6 +44,10 @@ contract MathTester with Deployable {
     get fun xor(a: Int, b: Int): Int {
         return a ^ b;
     }
+
+    get fun bitwise_not(a: Int): Int {
+        return ~a;
+    }
 
     //
     // Augmented assignment
@@ -386,4 +390,20 @@ contract MathTester with Deployable {
     get fun precedence12(): Int {
         return 5 ^ (6 | 7) & 8;
     }
+
+    get fun bitwiseNot1(x: Int): Int {
+        return ~~x;
+    }
+
+    get fun bitwiseNot2(x: Int): Int {
+        return ~~~x;
+    }
+
+    get fun bitwiseNot3(x: Int): Int {
+        return ~-x;
+    }
+
+    get fun bitwiseNot4(x: Int): Int {
+        return -~x;
+    }
 }

src/types/__snapshots__/resolveDescriptors.spec.ts.snap

@@ -276,6 +276,24 @@ Line 1, col 1:
 "
 `;
 
+exports[`resolveDescriptors should fail descriptors for case-28 1`] = `
+"<unknown>:4:18: Cannot reduce expression to a constant integer
+Line 4, col 18:
+  3 | 
+> 4 | const a: Int = ~ true;
+                       ^~~~
+"
+`;
+
+exports[`resolveDescriptors should fail descriptors for case-29 1`] = `
+"<unknown>:4:17: Cannot reduce expression to a constant boolean
+Line 4, col 17:
+  3 | 
+> 4 | const a: Bool = ~ true;
+                      ^~~~~~
+"
+`;
+
 exports[`resolveDescriptors should resolve descriptors for case-0 1`] = `
 {
   "BaseTrait": {

src/types/__snapshots__/resolveStatements.spec.ts.snap

@@ -530,6 +530,16 @@ Line 5, col 5:
 "
 `;
 
+exports[`resolveStatements should fail statements for case-53 1`] = `
+"<unknown>:5:12: Invalid type "Bool" for unary operator "~"
+Line 5, col 12:
+  4 | fun test(a: Bool): Int {
+> 5 |     return ~a;
+                 ^~
+  6 | }
+"
+`;
+
 exports[`resolveStatements should resolve statements for case-0 1`] = `
 [
   [

src/types/resolveConstantValue.ts

@@ -37,6 +37,8 @@ function reduceIntImpl(ast: ASTExpression): bigint {
             return -reduceInt(ast.right);
         } else if (ast.op === "+") {
             return reduceInt(ast.right);
+        } else if (ast.op === "~") {
+            return ~reduceInt(ast.right);
         }
     } else if (ast.kind === "op_static_call") {
         if (ast.name === "ton") {

src/types/resolveExpression.ts

@@ -311,7 +311,7 @@ function resolveUnaryOp(
 
     // Check right type dependent on operator
     let resolvedType = getExpType(ctx, exp.right);
-    if (exp.op === "-" || exp.op === "+") {
+    if (exp.op === "-" || exp.op === "+" || exp.op === "~") {
         if (
             resolvedType.kind !== "ref" ||
             resolvedType.optional ||

src/types/stmts-failed/case-53.tact

@@ -0,0 +1,6 @@
+primitive Int;
+primitive Bool;
+
+fun test(a: Bool): Int {
+    return ~a;
+}

src/types/test-failed/case-28.tact

@@ -0,0 +1,4 @@
+primitive Int;
+primitive Bool;
+
+const a: Int = ~ true;

src/types/test-failed/case-29.tact

@@ -0,0 +1,4 @@
+primitive Int;
+primitive Bool;
+
+const a: Bool = ~ true;