Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-17 00:03:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Accept a token number in a %left, %right, or %nonassoc for POSIX

Browse Source 
conformance.  Reported by Tim Josling at
<http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00010.html>.
* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Precedence Decl): Describe how literal strings
and code numbers are treated by precedence declarations.
* src/parse-gram.y (precedence_declaration): Use symbols.prec instead
of symbols.1.
(symbols.prec): New, just like symbols.1 but uses symbol.prec instead
of symbol.
(symbol.prec): New, just like symbol but allows INT.
* src/symtab.c (symbol_user_token_number_set): Remove an aver that no
longer holds.
* tests/regression.at (Token number in precedence declaration): New
test case.
This commit is contained in:
Joel E. Denny
2008-02-17 00:18:36 +00:00
parent 80d2c3adcc
commit ab7f29f8f9
7 changed files with 365 additions and 225 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
tests/regression.at
View File

@@ -1,6 +1,6 @@
# Bison Regressions. -*- Autotest -*-
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
@@ -1181,3 +1181,64 @@ state 2
]])
AT_CLEANUP
## ---------------------------------------- ##
## Token number in precedence declaration. ##
## ---------------------------------------- ##
AT_SETUP([[Token number in precedence declaration.]])
# POSIX says token numbers can be declared in %left, %right, and %nonassoc, but
# we lost this in Bison 1.50.
AT_DATA_GRAMMAR([input.y],
[[%{
#include <stdio.h>
void yyerror (char const *);
int yylex (void);
%}
%error-verbose
%left TK1 1 TK2 2 "tok alias" 3
%%
start: TK1 sr_conflict "tok alias" ;
sr_conflict:
TK2
| TK2 "tok alias"
;
%%
void
yyerror (char const *msg)
{
fprintf (stderr, "%s\n", msg);
}
int
yylex (void)
{
static int const input[] = { 1, 2, 3, 0 };
static int const *inputp = input;
return *inputp++;
}
int
main (void)
{
return yyparse ();
}
]])
AT_BISON_CHECK([[-o input.c input.y]], [[0]],,
[[input.y:24.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias"
]])
AT_COMPILE([[input]])
AT_PARSER_CHECK([[./input]])
AT_CLEANUP