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[WIP] Ast specifier action #234

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[WIP] Ast specifier action #234

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4e3656d
Add identifier action
hatsusato Sep 11, 2016
5037925
Add integer-constant action
hatsusato Sep 11, 2016
eebd0aa
Add expression action
hatsusato Sep 11, 2016
df12620
Add fundamental-specifier action
hatsusato Sep 11, 2016
7518e2e
Add storage-class-specifier action
hatsusato Sep 11, 2016
7ee7ca0
Add linkage-specifier action
hatsusato Sep 11, 2016
8fc85da
Add typedef-specifier action
hatsusato Sep 11, 2016
4a5f65a
Add fundamental-specifier action
hatsusato Sep 11, 2016
4cca5da
Add declaration-specifiers action
hatsusato Sep 11, 2016
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10 changes: 9 additions & 1 deletion src/ast.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,15 @@
#define KMC_C90_COMPILER_AST_H

enum AstTag {
AST_IDENTIFIER
AST_IDENTIFIER,
AST_INTEGER_CONSTANT,
AST_TYPE_VOID,
AST_TYPE_INT,
AST_SPEC_AUTO,
AST_SPEC_REGISTER,
AST_SPEC_STATIC,
AST_SPEC_EXTERN,
AST_SPEC_TYPEDEF
};

#endif /* KMC_C90_COMPILER_AST_H */
81 changes: 62 additions & 19 deletions src/parser.y
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Original file line number Diff line number Diff line change
Expand Up @@ -88,22 +88,41 @@ void set_yyin_string(const char *code);
%%

identifier
: IDENTIFIER
: IDENTIFIER {
$$ = cons(sexpr_make_ast(AST_IDENTIFIER), $[IDENTIFIER]);
}
;

expression.opt
: %empty
| expression
: %empty {
$$ = NULL;
}
| expression {
$$ = $[expression];
}
;

expression
: identifier
| INTEGER_CONSTANT
: identifier {
$$ = $[identifier];
}
| integer-constant {
$$ = $[integer-constant];
}
;

integer-constant
: INTEGER_CONSTANT {
$$ = cons(sexpr_make_ast(AST_INTEGER_CONSTANT), $[INTEGER_CONSTANT]);
}

fundamental-specifier
: VOID
| INT
: VOID {
$$ = sexpr_make_ast(AST_TYPE_VOID);
}
| INT {
$$ = sexpr_make_ast(AST_TYPE_INT);
}
/* | CHAR */
/* | SIGNED CHAR */
/* | UNSIGNED CHAR */
Expand All @@ -119,39 +138,63 @@ fundamental-specifier
;

storage-class-specifier.opt
: %empty
| storage-class-specifier
: %empty {
$$ = NULL;
}
| storage-class-specifier {
$$ = $[storage-class-specifier];
}
;

storage-class-specifier
: AUTO
| REGISTER
| STATIC
: AUTO {
$$ = sexpr_make_ast(AST_SPEC_AUTO);
}
| REGISTER {
$$ = sexpr_make_ast(AST_SPEC_REGISTER);
}
| STATIC {
$$ = sexpr_make_ast(AST_SPEC_STATIC);
}
;

linkage-specifier.opt
: %empty
| linkage-specifier
: %empty {
$$ = NULL;
}
| linkage-specifier {
$$ = $[linkage-specifier];
}
;

linkage-specifier
: EXTERN
| STATIC
: EXTERN {
$$ = sexpr_make_ast(AST_SPEC_EXTERN);
}
| STATIC {
$$ = sexpr_make_ast(AST_SPEC_STATIC);
}
;

typedef-specifier
: TYPEDEF
: TYPEDEF {
$$ = sexpr_make_ast(AST_SPEC_TYPEDEF);
}
;

type-specifier
: fundamental-specifier
: fundamental-specifier {
$$ = cons($[fundamental-specifier], NULL);
}
/* | struct-or-union-specifier */
/* | enum-specifier */
/* | typedef-name */
;

declaration-specifiers
: type-specifier
: type-specifier {
$$ = $[type-specifier];
}
/* : type-specifier type-qualifier-list.opt */
/* | type-qualifier declaration-specifiers */
;
Expand Down