new grammar using packcc

1 files changed, 23 insertions, 13 deletions

diff --git a/grammar.peg b/grammar.peg
index fc7db48..bbb5baa 100644
--- a/grammar.peg
+++ b/grammar.peg
@@ -1,27 +1,37 @@
-%{
+%source { 
 #include <stdio.h>
 #include <stdlib.h>
-#include "ast.h"
+#include <string.h>
+}
 
-AstVec numbers;
-%}
+%common { 
+#include "ast.h"
+}
 
+%value "AstNode" 
 
-Numberlist = ( n:NUMBER { astvec_append(&numbers, astnode_new_num(n)); }
-             )+
+numberlist <- { $$ = astnode_new_list(); }
+	( n:number _ { astnode_append(&$$, n); } ) + 
+	EOL
 
 
-NUMBER = < [0-9]+ > [ \t]* { $$ = atoi(yytext); }
+number <- < [0-9]+ >  { $$ = astnode_new_num(atoi($1)); }
+EOL <- '\n' / '\r\n' / '\r' 
+_ <- [ \t]*
 
 %%
 
 int main() {
-	printf("len %ld cap %ld vals %p\n", numbers.len, numbers.cap, numbers.vals);
-	while (yyparse())   ;
-	printf("len %ld cap %ld vals %p\n", numbers.len, numbers.cap, numbers.vals);
-	for (int i = 0; i < numbers.len; i++) {
-		printf("[%d] ",numbers.vals[i].as.num);
+	pcc_context_t *ctx = pcc_create(NULL);
+	AstNode ret;
+	memset(&ret, 0, sizeof ret);
+	while (pcc_parse(ctx, &ret))  ;
+	AstVec *v = &ret.as.list;
+	printf("%d: %ld %ld\n",ret.ty, v->len,v->cap);
+	for (int i = 0; i < v->len; i++) {
+		printf("  %d:[%d]\n", v->vals[i].ty, v->vals[i].as.num);
 	}
-
+	pcc_destroy(ctx);
 	return 0;
 }
+