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parser.y
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%{
#define Trace(t) printf(t)
%}
%union{
float fval;
int ival;
char *sval;
}
%type <sval> constant_expr
%type <sval> type
%type <sval> expr
%type <sval> integer_expr
%type <sval> integer_expr_arg
%type <sval> boolean_expr
%type <sval> boolean_expr_arg
%type <sval> func_invoke
/* tokens */
%token SEMICOLON
%token <sval> IDENTIFIER
%token FN
%token PRINTLN
%token <sval> BOOL
%token BREAK
%token CHAR
%token CONTINUE
%token DO
%token ELSE
%token ENUM
%token EXTERN
%token <sval> FLOAT
%token FOR
%token IF
%token IN
%token <sval> INT
%token LET
%token LOOP
%token MATCH
%token MUT
%token PRINT
%token PUB
%token RETURN
%token SELF
%token STATIC
%token <sval> STR
%token STRUCT
%token USE
%token WHERE
%token WHILE
%token <sval> TRUE
%token <sval> FALSE
%token COMMA
%token COLON
%token PARENTHESESL
%token PARENTHESESR
%token SBRACKETSL
%token SBRACKETSR
%token CBRACKETSL
%token CBRACKETSR
%token PLUS
%token MINUS
%token MULTIPLY
%token DIVIDE
%token DPLUS
%token DMINUS
%token MOD
%token LESST
%token LESSE
%token LARGERT
%token LARGERE
%token EQUAL
%token NEQUAL
%token AND
%token OR
%token NOT
%token ASSIGN
%token PLUSE
%token MINUSE
%token MULTIPLYE
%token DIVIDEE
%token <sval> NUMBER
%token <sval> REALNUMBER
%token <sval> STRING
%start program
%left OR
%left AND
%left NOT
%left LESST LESSE EQUAL NEQUAL LARGERE LARGERT
%left PLUS MINUS
%left MULTIPLY DIVIDE
%left UMINUS
%%
program: normal_declars func_declars
{
Trace("Reducing to program\n");
Dump(Top(SymbolTables)->table, Top(SymbolTables)->tableName);
}
|
normal_declars
{
Trace("Reducing to program\n");
Dump(Top(SymbolTables)->table, Top(SymbolTables)->tableName);
}
|
func_declars
{
Trace("Reducing to program\n");
Dump(Top(SymbolTables)->table, Top(SymbolTables)->tableName);
}
;
normal_declars: normal_declars constant_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
|
constant_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
|
normal_declars variable_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
|
variable_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
|
normal_declars array_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
|
array_declar SEMICOLON
{
Trace("Reducing to normal declaration\n");
}
;
func_declars: func_declars func_declar
{
Trace("Reducing to function declaration\n");
}
|
func_declar
{
Trace("Reducing to function declaration\n");
}
;
constant_declar:LET IDENTIFIER COLON type ASSIGN constant_expr
{
Trace("Reducing to constant declaration w/ type and initial value\n");
if(Search(Top(SymbolTables)->table, $2) == NULL){
ID *newID = CreateID($2);
if(nowType == 0){
if(strcmp("int", $4) != 0){
printf("Error: %d is not %s type\n", atoi($6), $4);
}
else{
int *temp = (int*)malloc(sizeof(int));
*temp = atoi($6);
void *val = (void*)temp;
newID->type = "int";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 1){
if(strcmp("float", $4) != 0){
printf("Error: %f is not %s type\n", atof($6), $4);
}
else{
float *temp = (float*)malloc(sizeof(float));
*temp = atof($6);
void *val = (void*)temp;
newID->type = "float";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 2){
if(strcmp("str", $4) != 0){
printf("Error: %s is not %s type\n", $6, $4);
}
else{
char *temp = strdup($6);
void *val = (void*)temp;
newID->type = "str";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 3){
if(strcmp("bool", $4) != 0){
printf("Error: %s is not %s type\n", $6, $4);
}
else{
char *temp = strdup($6);
void *val = (void*)temp;
newID->variableType = 0;
newID->type = "bool";
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
}
else{
printf("Error: nowType is out of range [0,3]\n, nowType = %d", nowType);
nowType = -1;
}
}
else{
printf("Error: %s already exists!", $2);
}
}
|
LET IDENTIFIER ASSIGN constant_expr
{
Trace("Reducing to constant declaration w/ initial value\n");
if(Search(Top(SymbolTables)->table, $2) == NULL){
ID *newID = CreateID($2);
if(nowType == 0){
int *temp = (int*)malloc(sizeof(int));
*temp = atoi($4);
void *val = (void*)temp;
newID->variableType = 0;
newID->type = "nint";
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
else if(nowType == 1){
float *temp = (float*)malloc(sizeof(float));
*temp = atof($4);
void *val = (void*)temp;
newID->type = "nfloat";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
else if(nowType == 2){
char *temp = strdup($4);
void *val = (void*)temp;
newID->type = "nstr";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
else if(nowType == 3){
char *temp = strdup($4);
void *val = (void*)temp;
newID->type = "nbool";
newID->variableType = 0;
newID->value = val;
nowType = -1;
Insert(Top(SymbolTables)->table, newID);
}
else{
printf("Error: nowType is out of range [0,3]\n, nowType = %d", nowType);
nowType = -1;
}
}
else{
printf("Error: %s already exists!", $2);
}
}
;
variable_declar:LET MUT IDENTIFIER COLON type ASSIGN constant_expr
{
Trace("Reducing to variable declaration w/ type and initial value\n");
int existed = 1;
ID *newID = Search(Top(SymbolTables)->table, $3);
if(newID == NULL){
newID = CreateID($3);
existed = 0;
}
if(nowType == 0){
if(strcmp("int", $5) != 0){
printf("Error: %d is not %s type\n", atoi($7), $5);
}
else{
int *temp = (int*)malloc(sizeof(int));
*temp = atoi($7);
void *val = (void*)temp;
newID->variableType = 1;
newID->type = "int";
newID->value = val;
nowType = -1;
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s = %s\n", $3, $7);
newID->globalORlocal = 0;
}
else{
printtab(tabNum);
fprintf(Instructions, "sipush %s\n", $7);
printtab(tabNum);
fprintf(Instructions, "istore %d\n", nowStkIndex);
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
}
else if(nowType == 1){
if(strcmp("float", $5) != 0){
printf("Error: %f is not %s type\n", atof($7), $5);
}
else{
float *temp = (float*)malloc(sizeof(float));
*temp = atof($7);
void *val = (void*)temp;
newID->variableType = 1;
newID->type = "float";
newID->value = val;
nowType = -1;
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
}
else if(nowType == 2){
if(strcmp("str", $5) != 0){
printf("Error: %s is not %s type\n", $7, $5);
}
else{
char *temp = strdup($7);
void *val = (void*)temp;
newID->type = "str";
newID->variableType = 1;
newID->value = val;
nowType = -1;
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
}
else if(nowType == 3){
if(strcmp("bool", $5) != 0){
printf("Error: %s is not %s type\n", $7, $5);
}
else{
char *temp = strdup($7);
void *val = (void*)temp;
newID->type = "bool";
newID->variableType = 1;
newID->value = val;
nowType = -1;
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s = %d\n", $3, (strcmp($7, "true")==0?1:0));
newID->globalORlocal = 0;
}
else{
printtab(tabNum);
fprintf(Instructions, "sipush %d\n", (strcmp($7, "true")==0?1:0));
printtab(tabNum);
fprintf(Instructions, "istore %d\n", nowStkIndex);
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
}
else{
printf("Error: nowType is out of range [0,3]\n, nowType = %d", nowType);
nowType = -1;
}
}
|
LET MUT IDENTIFIER COLON type
{
Trace("Reducing to variable declaration w/ type\n");
int existed = 1;
ID *newID = Search(Top(SymbolTables)->table, $3);
if(newID == NULL){
newID = CreateID($3);
existed = 0;
}
newID->variableType = 1;
if(newID->value == NULL){
newID->type = $5;
}
else{
char *temp = strdup("n");
strcat(temp, $5);
if(strcmp(temp, newID->type) == 0){
newID->type = $5;
}
else{
printf("Error: Unsuitable type!\n");
}
}
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s\n", $3);
newID->globalORlocal = 0;
}
else{
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
|
LET MUT IDENTIFIER ASSIGN constant_expr
{
Trace("Reducing to variable declaration w/ initial value\n");
int existed = 1;
ID *newID = Search(Top(SymbolTables)->table, $3);
if(newID == NULL){
newID = CreateID($3);
existed = 0;
}
if(nowType == 0){
int *temp = (int*)malloc(sizeof(int));
*temp = atoi($5);
void *val = (void*)temp;
newID->variableType = 1;
newID->type = "nint";
newID->value = val;
nowType = -1;
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s = %s\n", $3, $5);
newID->globalORlocal = 0;
}
else{
printtab(tabNum);
fprintf(Instructions, "sipush %s\n", $5);
printtab(tabNum);
fprintf(Instructions, "istore %d\n", nowStkIndex);
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 1){
float *temp = (float*)malloc(sizeof(float));
*temp = atof($5);
void *val = (void*)temp;
newID->type = "nfloat";
newID->variableType = 1;
newID->value = val;
nowType = -1;
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 2){
char *temp = strdup($5);
void *val = (void*)temp;
newID->type = "nstr";
newID->variableType = 1;
newID->value = val;
nowType = -1;
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
else if(nowType == 3){
char *temp = strdup($5);
void *val = (void*)temp;
newID->type = "nbool";
newID->variableType = 1;
newID->value = val;
nowType = -1;
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s = %d\n", $3, (strcmp($5, "true")==0?1:0));
newID->globalORlocal = 0;
}
else{
printtab(tabNum);
fprintf(Instructions, "sipush %d\n", (strcmp($5, "true")==0?1:0));
printtab(tabNum);
fprintf(Instructions, "istore %d\n", nowStkIndex);
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
else{
printf("Error: nowType is out of range [0,3]\n, nowType = %d", nowType);
nowType = -1;
}
}
|
LET MUT IDENTIFIER
{
Trace("Reducing to variable declaration w/ no type and initial value\n");
if(Search(Top(SymbolTables)->table, $3) == NULL){
ID *newID = CreateID($3);
newID->variableType = 1;
if(Top(SymbolTables)->tableName == 1){
printtab(tabNum);
fprintf(Instructions, "field static int %s\n", $3);
newID->globalORlocal = 0;
}
else{
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
}
Insert(Top(SymbolTables)->table, newID);
}
else{
printf("Error: %s already exists!\n", $3);
}
}
;
array_declar: LET MUT IDENTIFIER SBRACKETSL type COMMA NUMBER SBRACKETSR
{
Trace("Reducing to array declaration w/ type and # of elements\n");
ID * newID = Search(Top(SymbolTables)->table, $3);
int existed = 1;
if(newID == NULL){
newID = CreateID($3);
existed = 0;
}
int *temp = (int*)malloc(sizeof(int));
*temp = atoi($7);
void *val = (void*)temp;
char *stemp = strdup($5);
strcat(stemp, "_array");
newID->type = stemp;
newID->value = val;
if(existed == 0){
Insert(Top(SymbolTables)->table, newID);
}
}
;
func_declar: FN
{
printtab(tabNum);
fprintf(Instructions, "method public static");
IDstk *newTable = stkCreate();
stkInsert(SymbolTables, newTable);
inFuncBlock = 1;
}
func_body block
{
Trace("Reducing to function declaration w/ arguments and return type\n");
if(returned == 0){
printtab(tabNum);
fprintf(Instructions, "return\n");
}
tabNum--;
printtab(tabNum);
fprintf(Instructions, "}\n");
inFuncBlock = 0;
argumentsStr = NULL;
returned = 0;
nowStkIndex = 0;
}
;
arguments: func_argument
|
;
func_body: IDENTIFIER PARENTHESESL arguments PARENTHESESR MINUS LARGERT type
{
ID *newID = Search(Top(SymbolTables)->table, $1);
if(newID == NULL){
newID = CreateID($1);
newID->type = strdup("Function");
Insert(SymbolTables->table, newID);
}
else{
printf("%s already existed!\n", $1);
}
newID->argumentsTypeList = argumentsStr;
newID->returnType = strdup($7);
if(strcmp($1, "main") != 0){
if(argumentsStr == NULL){
fprintf(Instructions, " %s %s()\n", $7, $1);
}
else{
fprintf(Instructions, " %s %s(%s)\n", $7, $1, argumentsStr);
}
}
else{
fprintf(Instructions, " %s %s(java.lang.String[])\n", $7, $1);
}
printtab(tabNum);
fprintf(Instructions, "max_stack 15\n");
printtab(tabNum);
fprintf(Instructions, "max_locals 15\n");
printtab(tabNum);
fprintf(Instructions, "{\n");
tabNum++;
}
|
IDENTIFIER PARENTHESESL arguments PARENTHESESR
{
ID *newID = Search(Top(SymbolTables)->table, $1);
if(newID == NULL){
newID = CreateID($1);
newID->type = strdup("Function");
Insert(SymbolTables->table, newID);
}
else{
printf("%s already existed!\n", $1);
}
newID->argumentsTypeList = argumentsStr;
newID->returnType = strdup("void");
if(strcmp($1, "main") != 0){
if(argumentsStr == NULL){
fprintf(Instructions, " void %s()\n", $1);
}
else{
fprintf(Instructions, " void %s(%s)\n", $1, argumentsStr);
}
}
else{
fprintf(Instructions, " void %s(java.lang.String[])\n", $1);
}
printtab(tabNum);
fprintf(Instructions, "max_stack 15\n");
printtab(tabNum);
fprintf(Instructions, "max_locals 15\n");
printtab(tabNum);
fprintf(Instructions, "{\n");
tabNum++;
}
;
func_argument: func_argument COMMA IDENTIFIER COLON type
{
ID *newID = Search(Top(SymbolTables)->table, $3);
if(newID == NULL){
newID = CreateID($3);
newID->type = $5;
newID->variableType = 1;
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
Insert(Top(SymbolTables)->table, newID);
}
strcat(argumentsStr, ", ");
strcat(argumentsStr, $5);
}
|
IDENTIFIER COLON type
{
ID *newID = Search(Top(SymbolTables)->table, $1);
if(newID == NULL){
newID = CreateID($1);
newID->type = $3;
newID->variableType = 1;
newID->stkIndex = nowStkIndex;
nowStkIndex++;
newID->globalORlocal = 1;
Insert(Top(SymbolTables)->table, newID);
}
argumentsStr = strdup($3);
}
;
block: cl normal_declars stmts CBRACKETSR
{
Trace("Reducing to block w/ normal declaration and statements\n");
Dump(Top(SymbolTables)->table, Top(SymbolTables)->tableName);
Pop(SymbolTables);
inFuncBlock = 0;
}
|
cl stmts CBRACKETSR
{
Trace("Reducing to block w/ statements\n");
Dump(Top(SymbolTables)->table, Top(SymbolTables)->tableName);
Pop(SymbolTables);
inFuncBlock = 0;
}
;
cl: CBRACKETSL
{
if(inFuncBlock == 0){
IDstk *newTable = stkCreate();
stkInsert(SymbolTables, newTable);
}
inFuncBlock = 0;
}
;
stmts: stmts simple_stmt SEMICOLON
{
Trace("Reducing to statements\n");
}
|
simple_stmt SEMICOLON
{
Trace("Reducing to statements\n");
}
|
stmts block
{
Trace("Reducing to statements\n");
}
|
block
{
Trace("Reducing to statements\n");
}
|
stmts conditional
{
Trace("Reducing to statements1\n");
}
|
conditional
{
Trace("Reducing to statements2\n");
}
|
stmts loop
{
Trace("Reducing to statements\n");
}
|
loop
{
Trace("Reducing to statements\n");
}
|
stmts func_invoke
{
Trace("Reducing to statements\n");
}
|
func_invoke
{
Trace("Reducing to statements\n");
}
;
simple_stmt: IDENTIFIER ASSIGN expr
{
Trace("Reducing to simple statement\n");
ID *newID = stkSearch(SymbolTables, $1);
if(newID == NULL){
printf("Error: Undefined variable\n");
exit(1);
}
if(newID->variableType == 1){
if(newID->globalORlocal == 1){
printtab(tabNum);
fprintf(Instructions, "istore %d\n", newID->stkIndex);
}
else if(newID->globalORlocal == 0){
printtab(tabNum);
fprintf(Instructions, "putstatic int project3.%s\n", newID->name);
}
}
switch(nowType){
case 0:
if(newID->type == NULL || strcmp("int", newID->type) == 0 || strcmp("nint", newID->type) == 0){
int* temp = (int*)malloc(sizeof(int));
*temp = atoi($3);
newID->value = (void*)temp;
}
else{
printf("Error: Unsuitable type\n");
}
break;
case 1:
if(newID->type == NULL || strcmp("float", newID->type) == 0 || strcmp("nfloat", newID->type) == 0){
float* temp = (float*)malloc(sizeof(float));
*temp = atof($3);
newID->value = (void*)temp;
}
else{
printf("Error: Unsuitable type\n");
}
break;
case 2:
if(newID->type == NULL || strcmp("str", newID->type) == 0 || strcmp("nstr", newID->type) == 0){
newID->value = (void*)$3;
}
else{
printf("Error: Unsuitable type\n");
}
break;
case 3:
if(newID->type == NULL || strcmp("bool", newID->type) == 0 || strcmp("nbool", newID->type) == 0){
newID->value = (void*)$3;
}
else{
printf("Error: Unsuitable type\n");
}
break;
default:
printf("Error: Undefined type\n");
break;
}
}
|
array_ref ASSIGN expr
{
Trace("Reducing to simple statement\n");
}
|
PRINT
{
printtab(tabNum);
fprintf(Instructions, "getstatic java.io.PrintStream java.lang.System.out\n");
}
expr
{
Trace("Reducing to simple statement\n");
if(nowType == 2){
printtab(tabNum);
fprintf(Instructions, "invokevirtual void java.io.PrintStream.print(java.lang.String)\n");
}
else{
printtab(tabNum);
fprintf(Instructions, "invokevirtual void java.io.PrintStream.print(int)\n");
}
}
|
PRINTLN
{
printtab(tabNum);
fprintf(Instructions, "getstatic java.io.PrintStream java.lang.System.out\n");
}
expr
{
Trace("Reducing to simple statement\n");
if(nowType == 2){
printtab(tabNum);
fprintf(Instructions, "invokevirtual void java.io.PrintStream.println(java.lang.String)\n");
}
else{
printtab(tabNum);
fprintf(Instructions, "invokevirtual void java.io.PrintStream.println(int)\n");
}
}
|
READ IDENTIFIER
{
Trace("Reducing to simple statement\n");
}
|
RETURN
{
Trace("Reducing to simple statement\n");
printtab(tabNum);
fprintf(Instructions, "return\n");
returned = 1;
}
|
RETURN expr
{
Trace("Reducing to simple statement\n");
printtab(tabNum);
fprintf(Instructions, "ireturn\n");
returned = 1;
}
;
expr: integer_expr
{
Trace("Reducing to expression\n");
$$ = $1;
}
|
boolean_expr
{
Trace("Reducing to expression\n");
$$ = $1;
}
|
constant_expr
{
Trace("Reducing to expression\n");
$$ = $1;
}
|
IDENTIFIER
{
Trace("Reducing to expression1\n");
ID *newID = stkSearch(SymbolTables, $1);
if(newID == NULL){
printf("Error: Undefined variable\n");
exit(1);
}
if(newID->type == NULL){
$$ = strdup("0");
nowType = 0;
}
else if(strcmp(newID->type, "int") == 0 ||strcmp(newID->type, "nint") == 0){
sprintf($$, "%d", *(int*)newID->value);
nowType = 0;
}
else if(strcmp(newID->type, "float") == 0 ||strcmp(newID->type, "nfloat") == 0){
sprintf($$, "%f", *(float*)newID->value);
nowType = 1;
}
else if(strcmp(newID->type, "str") == 0 ||strcmp(newID->type, "nstr") == 0){
$$ = (char*)newID->value;
nowType = 2;
}
else if(strcmp(newID->type, "bool") == 0 ||strcmp(newID->type, "nbool") == 0){
$$ = (char*)newID->value;
nowType = 3;
}
else{
printf("Error: Can't print type %s variable\n", newID->type);
}
if(newID->variableType == 1){
if(newID->globalORlocal == 0){
printtab(tabNum);
fprintf(Instructions, "getstatic int project3.%s\n", newID->name);
}
else{
printtab(tabNum);
fprintf(Instructions, "iload %d\n", newID->stkIndex);
}
}
}
|
func_invoke
{
Trace("Reducing to expression\n");
}
|
array_ref
{
Trace("Reducing to expression\n");
}
;
integer_expr: integer_expr PLUS integer_expr
{
printf("Reducing to integer expression\n");
if(nowType == 0){
sprintf($$, "%d", (atoi($1) + atoi($3)));
nowType = 0;
}
else if(nowType == 1){
sprintf($$, "%f", (atof($1) + atof($3)));
nowType = 1;
}