From 18f704edd0938355622049d853c1ce3cdfaee168 Mon Sep 17 00:00:00 2001
From: Marius Nita <marius@cs.pdx.edu>
Date: Tue, 3 Sep 2002 08:57:35 +0000
Subject: better error reporting. epist now reports the line number and token a
 parser error occurs at, as well as invalid actions.

---
 util/epist/epist.y | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'util/epist/epist.y')

diff --git a/util/epist/epist.y b/util/epist/epist.y
index d187e96f..243e4168 100644
--- a/util/epist/epist.y
+++ b/util/epist/epist.y
@@ -9,7 +9,10 @@
     
 #define YYPARSE_PARAM parser_obj
 #define YYSTYPE char*
-    
+
+extern int yylineno;
+extern char *yytext;
+
 extern "C" {
     int yylex();
     int yywrap() {
@@ -17,14 +20,15 @@ extern "C" {
     }
 }
 
-void yyerror(const char *c) {
-    printf("ERROR: %s\n", c);
+void yyerror(const char *c)
+{
+    printf("ERROR: %s, on line %d, near %s\n", c, yylineno, yytext);
 }
 
-
 %}
 
 %token OBRACE EBRACE SEMICOLON DASH NUMBER QUOTES WORD BINDING OPTIONS TRUE FALSE
+%expect 1
 
 %%
 
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