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syntax.y
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syntax.y
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%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "node.h"
#include "lex.yy.c"
extern node *root;
extern int flex_error;
int bison_error = 0;
%}
/* declared types */
%union{
node* no;
};
/* declared tokens */
%token <no> INT ID FLOAT RETURN IF WHILE TYPE STRUCT OCT HEX
%token <no> COMMA SEMI LC RC error
%right <no> NOT ASSIGN
%left <no> AND OR RELOP PLUS MINUS STAR DIV LP RP LB RB DOT
%type <no> Program ExtDefList ExtDef ExtDecList Specifier Exp
%type <no> StructSpecifier OptTag Tag VarDec FunDec VarList Args
%type <no> ParamDec CompSt StmtList Stmt DefList Def DecList Dec
%nonassoc <no> LOWER_THAN_ELSE
%nonassoc <no> ELSE
%%
Program : ExtDefList {
$$ = construct("Program", @$.first_line, 0);
add_child(&$$, $1);
root = $$;
if(flex_error == 0 && bison_error == 0) print_tree(root, 0);
}
;
ExtDefList : ExtDef ExtDefList {
$$ = construct("ExtDefList", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| { $$ = NULL;
}
;
ExtDef : Specifier ExtDecList SEMI {
$3 = construct("SEMI", @3.first_line, 0);
$$ = construct("ExtDef", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Specifier SEMI {
$2 = construct("SEMI", @2.first_line, 0);
$$ = construct("ExtDef", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| Specifier FunDec CompSt {
$$ = construct("ExtDef", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
;
ExtDecList : VarDec {
$$ = construct("ExtDecList", @$.first_line, 0);
add_child(&$$, $1);
}
| VarDec COMMA ExtDecList {
$$ = construct("ExtDecList", @$.first_line, 0);
$2 = construct("COMMA", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
;
Specifier : TYPE {
$1 = construct("TYPE",@1.first_line,4);
$$ = construct("Specifier", @$.first_line, 0);
memset($1->val.type_Type, 0, 20);
memcpy($1->val.type_Type, yylval.no->val.type_Type,20);
add_child(&$$, $1);
}
| StructSpecifier {
$$ = construct("Specifier", @$.first_line, 0);
add_child(&$$, $1);
}
;
StructSpecifier : STRUCT OptTag LC DefList RC { //printf("halaha\n");
$1 = construct("STRUCT", @1.first_line, 0);
$3 = construct("LC", @3.first_line, 0);
$5 = construct("RC", @5.first_line, 0);
$$ = construct("StructSpecifier", @$.first_line, 0);
//printf("lalaha\n");
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
add_child(&$$, $5);
}
| STRUCT Tag {
$$ = construct("StructSpecifier", @$.first_line, 0);
$1 = construct("STRUCT", @1.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
;
OptTag : ID {
//$1 = construct("ID", @1.first_line, 3);
$$ = construct("OptTag", @$.first_line, 0);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
add_child(&$$, $1);
}
| { $$ = NULL;
}
;
Tag : ID {
//$1 = construct("ID", @1.first_line, 3);
$$ = construct("Tag", @$.first_line, 0);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
add_child(&$$, $1);
}
;
VarDec : ID {
//$1 = construct("ID", @1.first_line, 3);
$$ = construct("VarDec", @$.first_line, 0);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
add_child(&$$, $1);
}
| VarDec LB INT RB {
$$ = construct("VarDec", @$.first_line, 0);
$2 = construct("LB", @2.first_line, 0);
$4 = construct("RB", @4.first_line, 0);
$3 = construct("INT", @3.first_line, 1);
$3->val.type_int = yylval.no->val.type_int;
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
}
;
FunDec : ID LP VarList RP {
//$1 = construct("ID", @1.first_line, 3);
$$ = construct("FunDec", @$.first_line, 0);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
$2 = construct("LP", @2.first_line, 0);
$4 = construct("RP", @4.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
}
| ID LP RP {
//$1 = construct("ID", @1.first_line, 3);
$$ = construct("FunDec", @$.first_line, 0);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
$2 = construct("LP", @2.first_line, 0);
$3 = construct("RP", @3.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| error RP // {printf("uhsadfiugdsaufg\n");}
;
VarList : ParamDec COMMA VarList {
$$ = construct("VarList", @$.first_line, 0);
$2 = construct("COMMA", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| ParamDec {
$$ = construct("VarList", @$.first_line, 0);
add_child(&$$, $1);
}
;
ParamDec : Specifier VarDec {
$$ = construct("ParamDec", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
;
CompSt : LC DefList StmtList RC {
$1 = construct("LC", @1.first_line, 0);
$4 = construct("RC", @4.first_line, 0);
$$ = construct("CompSt", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
}
| error RC //{printf("error1\n");}
//| error SEMI
| error RP
;
StmtList : Stmt StmtList {
$$ = construct("StmList", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| { $$ = NULL;
}
;
Stmt : Exp SEMI {
$$ = construct("Stmt", @$.first_line, 0);
$2 = construct("SEMI", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| error SEMI //{printf("error2\n");}
| CompSt {
$$ = construct("Stmt", @$.first_line, 0);
add_child(&$$, $1);
}
| RETURN Exp SEMI {
$$ = construct("Stmt", @$.first_line, 0);
$1 = construct("RETUEN", @1.first_line, 0);
$3 = construct("SEMI", @3.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| IF LP Exp RP Stmt {
$1 = construct("IF", @1.first_line, 0);
$2 = construct("LP", @2.first_line, 0);
$4 = construct("RP", @4.first_line, 0);
$$ = construct("Stmt", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
add_child(&$$, $5);
}
| IF LP Exp RP Stmt ELSE Stmt {
$1 = construct("IF", @1.first_line, 0);
$2 = construct("LP", @2.first_line, 0);
$4 = construct("RP", @4.first_line, 0);
$6 = construct("ELSE", @6.first_line, 0);
$$ = construct("Stmt", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
add_child(&$$, $5);
add_child(&$$, $6);
add_child(&$$, $7);
}
| WHILE LP Exp RP Stmt {
$1 = construct("WHILE", @1.first_line, 0);
$2 = construct("LP", @2.first_line, 0);
$4 = construct("RP", @4.first_line, 0);
$$ = construct("Stmt", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
add_child(&$$, $5);
}
;
DefList : Def DefList {
$$ = construct("DefList", @$.first_line, 0);
add_child(&$$, $1);
//printf("lalaha\n");
add_child(&$$, $2);
//printf("lalaha\n");
}
| { $$ = NULL;
}
;
Def : Specifier DecList SEMI {
$$ = construct("Def", @$.first_line, 0);
$3 = construct("SEMI", @3.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
;
DecList : Dec {
$$ = construct("DecList", @$.first_line, 0);
add_child(&$$, $1);
}
| Dec COMMA DecList {
$$ = construct("DecList", @$.first_line, 0);
$2 = construct("COMMA", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
;
Dec : VarDec {
$$ = construct("Dec", @$.first_line, 0);
add_child(&$$, $1);
}
| VarDec ASSIGN Exp {
$$ = construct("Dec", @$.first_line, 0);
$2 = construct("ASSIGN", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
;
Exp : Exp ASSIGN Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("ASSIGN", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp AND Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("AND", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp OR Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("OR", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp RELOP Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("RELOP", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp PLUS Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("PLUS", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp MINUS Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("MINUS", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp STAR Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("STAR", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp DIV Exp {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("DIV", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| LP Exp RP {
$1 = construct("LP", @1.first_line, 0);
$3 = construct("RP", @3.first_line, 0);
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| MINUS Exp {
$1 = construct("MINUS", @1.first_line, 0);
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| NOT Exp {
$1 = construct("NOT", @1.first_line, 0);
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
}
| ID LP Args RP {
//$1 = construct("ID", @1.first_line, 3);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("LP", @2.first_line, 0);
$4 = construct("RP", @4.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
}
| ID LP RP {
//$1 = construct("ID", @1.first_line, 3);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("LP", @2.first_line, 0);
$3 = construct("RP", @3.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp LB Exp RB {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("LB", @2.first_line, 0);
$4 = construct("RB", @4.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
add_child(&$$, $4);
}
| Exp DOT ID {
$$ = construct("Exp", @$.first_line, 0);
$2 = construct("DOT", @2.first_line, 0);
//$3 = construct("ID", @3.first_line, 3);
//memset($3->val.type_ID, 0, 20);
//memcpy($3->val.type_ID, yylval.no->val.type_ID,20);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| ID {
//$1 = construct("ID", @1.first_line, 3);
//memset($1->val.type_ID, 0, 20);
//memcpy($1->val.type_ID, yylval.no->val.type_ID,20);
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
}
| INT {
$1 = construct("INT", @1.first_line, 1);
$1->val.type_int = yylval.no->val.type_int;
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
}
| FLOAT {
$1 = construct("FLOAT", @1.first_line, 2);
$1->val.type_float = yylval.no->val.type_float;
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
}
| OCT {
$1 = construct("INT", @1.first_line, 1);
$1->val.type_int = yylval.no->val.type_int;
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
}
| HEX { $1 = construct("INT", @1.first_line, 1);
$1->val.type_int = yylval.no->val.type_int;
$$ = construct("Exp", @$.first_line, 0);
add_child(&$$, $1);
}
| error RP //{printf("error3\n");}
| error RB
;
Args : Exp COMMA Args {
$$ = construct("Args", @$.first_line, 0);
$2 = construct("COMMA", @2.first_line, 0);
add_child(&$$, $1);
add_child(&$$, $2);
add_child(&$$, $3);
}
| Exp {
$$ = construct("Args", @$.first_line, 0);
add_child(&$$, $1);
}
;
%%
yyerror(char* msg) {
printf("Error type B at line %d: %s \n", yylineno, msg);
bison_error = 1;
}