X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6e30ede87a1c39c53842a6a747ecd9f7484d92a5..188867ac65e5141ce20454ba6604900c923ba983:/tests/regression.at

diff --git a/tests/regression.at b/tests/regression.at
index 57d0609d..f5603eae 100644
--- a/tests/regression.at
+++ b/tests/regression.at
@@ -1,7 +1,6 @@
 # Bison Regressions.                               -*- Autotest -*-
 
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
-# 2010 Free Software Foundation, Inc.
+# Copyright (C) 2001-2012 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -163,7 +162,7 @@ AT_CLEANUP
 AT_SETUP([Braces parsing])
 
 AT_DATA([input.y],
-[[/* Bison used to swallow the character after `}'. */
+[[/* Bison used to swallow the character after '}'. */
 
 %%
 exp: { tests = {{{{{{{{{{}}}}}}}}}}; };
@@ -185,7 +184,7 @@ AT_CLEANUP
 AT_SETUP([Duplicate string])
 
 AT_DATA([input.y],
-[[/* `Bison -v' used to dump core when two tokens are defined with the same
+[[/* 'Bison -v' used to dump core when two tokens are defined with the same
    string, as LE and GE below. */
 
 %token NUM
@@ -198,7 +197,7 @@ exp: '(' exp ')' | NUM ;
 ]])
 
 AT_BISON_CHECK([-v -o input.c input.y], 0, [],
-[[input.y:6.8-14: warning: symbol `"<="' used more than once as a literal string
+[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string
 ]])
 
 AT_CLEANUP
@@ -388,13 +387,14 @@ default: 'a' }
 ]])
 
 AT_BISON_CHECK([input.y], [1], [],
-[[input.y:2.1: invalid character: `?'
-input.y:3.14: invalid character: `}'
-input.y:4.1: invalid character: `%'
-input.y:4.2: invalid character: `&'
-input.y:5.1-17: invalid directive: `%a-does-not-exist'
-input.y:6.1-2: invalid directive: `%-'
-input.y:7.1-8.0: missing `%}' at end of file
+[[input.y:2.1: invalid character: '?'
+input.y:3.14: invalid character: '}'
+input.y:4.1: invalid character: '%'
+input.y:4.2: invalid character: '&'
+input.y:5.1-17: invalid directive: '%a-does-not-exist'
+input.y:6.1: invalid character: '%'
+input.y:6.2: invalid character: '-'
+input.y:7.1-8.0: missing '%}' at end of file
 input.y:7.1-8.0: syntax error, unexpected %{...%}
 ]])
 
@@ -428,7 +428,7 @@ AT_CLEANUP
 
 AT_SETUP([Token definitions])
 
-# Bison managed, when fed with `%token 'f' "f"' to #define 'f'!
+# Bison managed, when fed with '%token 'f' "f"' to #define 'f'!
 AT_DATA_GRAMMAR([input.y],
 [%{
 #include <stdlib.h>
@@ -475,7 +475,7 @@ main (void)
 # the user specification is eliminated.
 AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],
 [[input.y:22.8-14: warning: symbol SPECIAL redeclared
-input.y:22.8-63: warning: symbol `"\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!"' used more than once as a literal string
+input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string
 ]])
 AT_COMPILE([input])
 
@@ -524,7 +524,7 @@ AT_CLEANUP
 
 # The generation of the reduction was once wrong in Bison, and made it
 # miss some reductions.  In the following test case, the reduction on
-# `undef_id_tok' in state 1 was missing.  This is stripped down from
+# 'undef_id_tok' in state 1 was missing.  This is stripped down from
 # the actual web2c.y.
 
 AT_SETUP([Web2c Report])
@@ -686,7 +686,7 @@ AT_CLEANUP
 ## Web2c Actions.  ##
 ## --------------- ##
 
-# The generation of the mapping `state -> action' was once wrong in
+# The generation of the mapping 'state -> action' was once wrong in
 # extremely specific situations.  web2c.y exhibits this situation.
 # Below is a stripped version of the grammar.  It looks like one can
 # simplify it further, but just don't: it is tuned to exhibit a bug,
@@ -769,7 +769,7 @@ static const yytype_uint8 yyrline[] =
 static const char *const yytname[] =
 {
   "$end", "error", "$undefined", "\"if\"", "\"const\"", "\"then\"",
-  "\"else\"", "$accept", "statement", "struct_stat", "if", "else", 0
+  "\"else\"", "$accept", "statement", "struct_stat", "if", "else", YY_NULL
 };
 static const yytype_uint16 yytoknum[] =
 {
@@ -1157,7 +1157,7 @@ AT_SETUP([[Extra lookahead sets in report]])
 # state's one item that (1) is associated with the same rule as the reduction
 # and (2) has its dot at the end of its RHS.  Previously, Bison also
 # erroneously printed the lookahead set next to all of the state's other items
-# associated with the same rule.  This bug affected only the `.output' file and
+# associated with the same rule.  This bug affected only the '.output' file and
 # not the generated parser source code.
 
 AT_DATA([[input.y]],
@@ -1205,12 +1205,15 @@ AT_DATA_GRAMMAR([input.y],
 %}
 
 %error-verbose
+%right END 0
 %left TK1 1 TK2 2 "tok alias" 3
 
 %%
 
-start: TK1 sr_conflict "tok alias" ;
-
+start:
+    TK1 sr_conflict "tok alias"
+  | start %prec END
+  ;
 sr_conflict:
   TK2
   | TK2 "tok alias"
@@ -1240,7 +1243,8 @@ main (void)
 ]])
 
 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"
+[[input.y:23.5-19: warning: rule useless in parser due to conflicts: start: start
+input.y:27.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias"
 ]])
 AT_COMPILE([[input]])
 AT_PARSER_CHECK([[./input]])
@@ -1263,9 +1267,11 @@ AT_SETUP([[parse-gram.y: LALR = IELR]])
 [cp $abs_top_srcdir/src/parse-gram.y input.y]
 AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]])
 [mv input.c lalr.c]
+AT_CAPTURE_FILE([lalr.c])
 AT_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]])
 [mv input.c ielr.c]
-AT_CHECK([[diff -u lalr.c ielr.c]])
+AT_CAPTURE_FILE([ielr.c])
+AT_CHECK([[diff lalr.c ielr.c]], [[0]])
 
 AT_CLEANUP
 
@@ -1375,11 +1381,11 @@ AT_DATA_GRAMMAR([input.y],
      large enough to overflow size_t.  */
   #define YYSIZE_T unsigned char
 
-  /* Bring in malloc and set _STDLIB_H so yacc.c doesn't try to
+  /* Bring in malloc and set EXIT_SUCCESS so yacc.c doesn't try to
      provide a malloc prototype using our YYSIZE_T.  */
   #include <stdlib.h>
-  #ifndef _STDLIB_H
-  # define _STDLIB_H 1
+  #ifndef EXIT_SUCCESS
+  # define EXIT_SUCCESS 0
   #endif
 
   /* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and
@@ -1477,3 +1483,193 @@ memory exhausted
 ]])
 
 AT_CLEANUP
+
+
+
+## ------------------------ ##
+## LAC: Exploratory stack.  ##
+## ------------------------ ##
+
+AT_SETUP([[LAC: Exploratory stack]])
+
+m4_pushdef([AT_LAC_CHECK], [
+
+AT_BISON_OPTION_PUSHDEFS([$1])
+
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+  #include <stdio.h>
+  void yyerror (char const *);
+  int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[);
+}
+
+]$1[
+%error-verbose
+%token 'c'
+
+%%
+
+// default reductions in inconsistent states
+// v   v v   v v v v   v v v v v v v
+S: A B A A B A A A A B A A A A A A A B C C A A A A A A A A A A A A B ;
+//       ^                     ^                               ^
+// LAC reallocs
+
+A: 'a' | /*empty*/ { printf ("inconsistent default reduction\n"); } ;
+B: 'b' ;
+C: /*empty*/ { printf ("consistent default reduction\n"); } ;
+
+%%
+
+void
+yyerror (char const *msg)
+{
+  fprintf (stderr, "%s\n", msg);
+}
+
+int
+yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[)
+{
+  static char const *input = "bbbbc";]AT_PURE_IF([[
+  *v = 0;]])[
+  return *input++;
+}
+
+int
+main (void)
+{
+  yydebug = 1;
+  return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
+                 -Dparse.lac.memory-trace=full \
+                 -t -o input.c input.y]], [[0]], [],
+[[input.y: conflicts: 21 shift/reduce
+]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input > stdout.txt 2> stderr.txt]], [[1]])
+
+# Make sure syntax error doesn't forget that 'a' is expected.  It would
+# be forgotten without lookahead correction.
+AT_CHECK([[grep 'syntax error,' stderr.txt]], [[0]],
+[[syntax error, unexpected 'c', expecting 'a' or 'b'
+]])
+
+# Check number of default reductions in inconsistent states to be sure
+# syntax error is detected before unnecessary reductions are performed.
+AT_CHECK([[perl -0777 -ne 'print s/inconsistent default reduction//g;' \
+           < stdout.txt || exit 77]], [[0]], [[14]])
+
+# Check number of default reductions in consistent states to be sure
+# it is performed before the syntax error is detected.
+AT_CHECK([[perl -0777 -ne 'print s/\bconsistent default reduction//g;' \
+           < stdout.txt || exit 77]], [[0]], [[2]])
+
+# Check number of reallocs to be sure reallocated memory isn't somehow
+# lost between LAC invocations.
+AT_CHECK([[perl -0777 -ne 'print s/\(realloc//g;' < stderr.txt \
+           || exit 77]], [[0]], [[3]])
+
+AT_BISON_OPTION_POPDEFS
+])
+
+AT_LAC_CHECK([[%define api.push-pull pull]])
+AT_LAC_CHECK([[%define api.push-pull pull %define api.pure]])
+AT_LAC_CHECK([[%define api.push-pull both]])
+AT_LAC_CHECK([[%define api.push-pull both %define api.pure]])
+
+m4_popdef([AT_LAC_CHECK])
+
+AT_CLEANUP
+
+
+
+## ------------------------ ##
+## LAC: Memory exhaustion.  ##
+## ------------------------ ##
+
+AT_SETUP([[LAC: Memory exhaustion]])
+
+m4_pushdef([AT_LAC_CHECK], [
+
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+  #include <stdio.h>
+  void yyerror (char const *);
+  int yylex (void);
+  #define YYMAXDEPTH 8
+}
+
+%error-verbose
+
+%%
+
+S: A A A A A A A A A ;
+A: /*empty*/ | 'a' ;
+
+%%
+
+void
+yyerror (char const *msg)
+{
+  fprintf (stderr, "%s\n", msg);
+}
+
+int
+yylex (void)
+{
+  static char const *input = "]$1[";
+  return *input++;
+}
+
+int
+main (void)
+{
+  yydebug = 1;
+  return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
+                 -t -o input.c input.y]], [[0]], [],
+[[input.y: conflicts: 8 shift/reduce
+]])
+AT_COMPILE([[input]])
+
+])
+
+# Check for memory exhaustion during parsing.
+AT_LAC_CHECK([[]])
+AT_PARSER_CHECK([[./input]], [[2]], [[]],
+[[Starting parse
+Entering state 0
+Reading a token: Now at end of input.
+LAC: initial context established for $end
+LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
+memory exhausted
+Cleanup: discarding lookahead token $end ()
+Stack now 0
+]])
+
+# Induce an immediate syntax error with an undefined token, and check
+# for memory exhaustion while building syntax error message.
+AT_LAC_CHECK([[z]], [[0]])
+AT_PARSER_CHECK([[./input]], [[2]], [[]],
+[[Starting parse
+Entering state 0
+Reading a token: Next token is token $undefined ()
+LAC: initial context established for $undefined
+LAC: checking lookahead $undefined: Always Err
+Constructing syntax error message
+LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
+syntax error
+memory exhausted
+Cleanup: discarding lookahead token $undefined ()
+Stack now 0
+]])
+
+m4_popdef([AT_LAC_CHECK])
+
+AT_CLEANUP