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|
%{
#include <stdio.h>
#include <stdlib.h>
#include "types.h"
int yylex();
void yyerror(const char *msg);
extern char *yytext;
ast *ass[MAXASS] = {0};
int asscount = 0;
void append(ast *a) {
ass[asscount] = a;
asscount++;
}
%}
%union {
char *intlit;
char *name;
ast *as;
values *vs;
}
%token <intlit> INTLIT
%token <name> NAME
%type <as> EXPR
%type <vs> ARGS ARG
%%
PROG : EXPRS {}
;
EXPRS : EXPR {append($1);}
| EXPRS EXPR {append($2);}
;
EXPR : '(' NAME ')' {$$ = newast($2);}
| '(' NAME ARGS ')' {
ast *a= newast($2);
a->vals = $3;
$$ = a;
}
;
ARGS : ARG
| ARGS ARG {$$ = addval($1, $2);}
;
ARG : EXPR {$$ = newastval($1);}
| INTLIT {$$ = newintval(atoi($1));}
;
%%
void yyerror(const char *msg) {
fprintf(stderr, "%s\n", msg);
}
|
