parser.y

来自「一个开源的JAVA虚拟机」· Y 代码 · 共 75 行

%{
#include <jpr/type.h>
#include "globals.h"
%}

%defines

%union{
  const char *utf8;
  ju2 index;
}

%token TOK_ATTRIBUTE
%token <utf8> TOK_UTF8
%token TOK_CONSTANT
%token TOK_CLASS
%token TOK_FIELD
%token TOK_METHOD
%token TOK_LBRACKET
%token TOK_RBRACKET
%token <index> TOK_INDEX

%type <index> constant_id
%type <index> field_id
%type <index> method_id

%start input

%%

input: declarations class_annotation constant_annotations field_annotations method_annotations
;

declarations: attribute_declaration
;

attribute_declaration : TOK_ATTRIBUTE TOK_UTF8 { define_attribute_name($2); }
;

class_annotation: /* empty */
| TOK_CLASS TOK_UTF8 { define_class_annotation($2); }
;

constant_annotations: /* empty */
| constant_annotation constant_annotations
;

constant_annotation : TOK_CONSTANT constant_id TOK_UTF8 { define_constant_annotation($2, $3); }
;

constant_id : TOK_LBRACKET TOK_INDEX TOK_RBRACKET { $$ = $2; }
;

field_annotations: /* empty */
| field_annotation field_annotations
;

field_annotation : TOK_FIELD field_id TOK_UTF8 { define_field_annotation($2, $3); }
;

field_id : TOK_LBRACKET TOK_INDEX TOK_RBRACKET { $$ = $2; }
;

method_annotations:   /* empty */
| method_annotation method_annotations
;

method_annotation : TOK_METHOD method_id TOK_UTF8 { define_method_annotation($2, $3); }
;

method_id : TOK_LBRACKET TOK_INDEX TOK_RBRACKET { $$ = $2; }
;

%%