# Bison Regressions. -*- Autotest -*-
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2010 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
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:6.1-2: invalid directive: `%-'
input.y:7.1-8.0: missing `%}' at end of file
input.y:7.1-8.0: syntax error, unexpected %{...%}
]])
%token C_TOKEN 'c'
%token 'd' D_TOKEN
%token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
+%token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
%%
exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!";
%%
}
]])
-AT_BISON_CHECK([-o input.c input.y])
+# Checking the warning message guarantees that the trigraph "??!" isn't
+# unnecessarily escaped here even though it would need to be if encoded in a
+# C-string literal. Also notice that unnecessary escaping, such as "\?", from
+# 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
+]])
AT_COMPILE([input])
+
+# Checking the error message here guarantees that yytname, which does contain
+# C-string literals, does have the trigraph escaped correctly. Thus, the
+# symbol name reported by the parser is exactly the same as that reported by
+# Bison itself.
AT_DATA([experr],
-[[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201?\?!", expecting a
+[[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!", expecting a
]])
AT_PARSER_CHECK([./input], 1, [], [experr])
AT_CLEANUP
2, 2, 2, 2, 2, 2, 1, 2, 3, 4,
5, 6
};
-static const yytype_uint8 yyprhs[] =
-{
- 0, 0, 3, 5, 6, 9, 14
-};
-static const yytype_int8 yyrhs[] =
-{
- 8, 0, -1, 9, -1, -1, 10, 11, -1, 3,
- 4, 5, 8, -1, 6, 8, -1
-};
static const yytype_uint8 yyrline[] =
{
0, 2, 2, 3, 3, 4, 5
{
0, 256, 257, 258, 259, 260, 261
};
-static const yytype_uint8 yyr1[] =
-{
- 0, 7, 8, 9, 9, 10, 11
-};
-static const yytype_uint8 yyr2[] =
+static const yytype_int8 yypact[] =
{
- 0, 2, 1, 0, 2, 4, 2
+ -2, -1, 4, -8, 0, 2, -8, -2, -8, -2,
+ -8, -8
};
static const yytype_uint8 yydefact[] =
{
3, 0, 0, 2, 0, 0, 1, 3, 4, 3,
6, 5
};
-static const yytype_int8 yydefgoto[] =
-{
- -1, 2, 3, 4, 8
-};
-static const yytype_int8 yypact[] =
-{
- -2, -1, 4, -8, 0, 2, -8, -2, -8, -2,
- -8, -8
-};
static const yytype_int8 yypgoto[] =
{
-8, -7, -8, -8, -8
};
+static const yytype_int8 yydefgoto[] =
+{
+ -1, 2, 3, 4, 8
+};
static const yytype_uint8 yytable[] =
{
10, 1, 11, 5, 6, 0, 7, 9
0, 3, 8, 9, 10, 4, 0, 6, 11, 5,
8, 8
};
+static const yytype_uint8 yyr1[] =
+{
+ 0, 7, 8, 9, 9, 10, 11
+};
+static const yytype_uint8 yyr2[] =
+{
+ 0, 2, 1, 0, 2, 4, 2
+};
]])
AT_CLEANUP
AT_LALR1_CC_IF(
[/* A C++ error reporting function. */
void
-yy::parser::error (const location&, const std::string& m)
+yy::parser::error (const std::string& m)
{
std::cerr << m << std::endl;
}
AT_BISON_OPTION_PUSHDEFS([$1])
_AT_DATA_DANCER_Y([$1])
AT_BISON_CHECK([-o dancer.c dancer.y])
-AT_LALR1_CC_IF(
- [AT_BISON_CHECK([-o dancer.cc dancer.y])
- AT_COMPILE_CXX([dancer])],
- [AT_BISON_CHECK([-o dancer.c dancer.y])
- AT_COMPILE([dancer])])
+AT_FULL_COMPILE([dancer])
AT_PARSER_CHECK([./dancer], 1, [],
[syntax error, unexpected ':'
])
AT_LALR1_CC_IF(
[/* A C++ error reporting function. */
void
-yy::parser::error (const location&, const std::string& m)
+yy::parser::error (const std::string& m)
{
std::cerr << m << std::endl;
}
AT_BISON_OPTION_PUSHDEFS([$1])
_AT_DATA_EXPECT2_Y([$1])
AT_BISON_CHECK([-o expect2.c expect2.y])
-AT_LALR1_CC_IF(
- [AT_BISON_CHECK([-o expect2.cc expect2.y])
- AT_COMPILE_CXX([expect2])],
- [AT_BISON_CHECK([-o expect2.c expect2.y])
- AT_COMPILE([expect2])])
+AT_FULL_COMPILE([expect2])
AT_PARSER_CHECK([./expect2], 1, [],
[syntax error, unexpected '+', expecting A or B
])
## Token number in precedence declaration. ##
## ---------------------------------------- ##
-AT_SETUP([[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_PARSER_CHECK([[./input]])
AT_CLEANUP
+
+
+
+## --------------------------- ##
+## parse-gram.y: LALR = IELR. ##
+## --------------------------- ##
+
+# If parse-gram.y's LALR and IELR parser tables ever begin to differ, we
+# need to fix parse-gram.y or start using IELR.
+
+AT_SETUP([[parse-gram.y: LALR = IELR]])
+
+# Avoid tests/bison's dark magic by processing a local copy of the
+# grammar. Avoid differences in synclines by telling bison that the
+# output files have the same name.
+[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_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]])
+[mv input.c ielr.c]
+AT_CHECK([[diff -u lalr.c ielr.c]])
+
+AT_CLEANUP
+
+
+
+## -------------------------------------------- ##
+## parse.error=verbose and YYSTACK_USE_ALLOCA. ##
+## -------------------------------------------- ##
+
+AT_SETUP([[parse.error=verbose and YYSTACK_USE_ALLOCA]])
+
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+ #include <stdio.h>
+ void yyerror (char const *);
+ int yylex (void);
+ #define YYSTACK_USE_ALLOCA 1
+}
+
+%define parse.error verbose
+
+%%
+
+start: check syntax_error syntax_error ;
+
+check:
+{
+ if (128 < sizeof yymsgbuf)
+ {
+ fprintf (stderr,
+ "The initial size of yymsgbuf in yyparse has increased\n"
+ "since this test group was last updated. As a result,\n"
+ "this test group may no longer manage to induce a\n"
+ "reallocation of the syntax error message buffer.\n"
+ "This test group must be adjusted to produce a longer\n"
+ "error message.\n");
+ YYABORT;
+ }
+}
+;
+
+// Induce a syntax error message whose total length is more than
+// sizeof yymsgbuf in yyparse. Each token here is 64 bytes.
+syntax_error:
+ "123456789112345678921234567893123456789412345678951234567896123A"
+| "123456789112345678921234567893123456789412345678951234567896123B"
+| error 'a' 'b' 'c'
+;
+
+%%
+
+void
+yyerror (char const *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+int
+yylex (void)
+{
+ /* Induce two syntax error messages (which requires full error
+ recovery by shifting 3 tokens) in order to detect any loss of the
+ reallocated buffer. */
+ static char const *input = "abc";
+ return *input++;
+}
+
+int
+main (void)
+{
+ return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-o input.c input.y]])
+AT_COMPILE([[input]])
+AT_PARSER_CHECK([[./input]], [[1]], [],
+[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B
+syntax error, unexpected $end, expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B
+]])
+
+AT_CLEANUP
+
+
+
+## ------------------------------ ##
+## parse.error=verbose overflow. ##
+## ------------------------------ ##
+
+# Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an
+# invocation of yysyntax_error has caused yymsg_alloc to grow to exactly
+# YYSTACK_ALLOC_MAXIMUM (perhaps because the normal doubling of size had
+# to be clipped to YYSTACK_ALLOC_MAXIMUM). In an old version of yacc.c,
+# a subsequent invocation of yysyntax_error that overflows during its
+# size calculation would return YYSIZE_MAXIMUM to yyparse. Then,
+# yyparse would invoke yyerror using the old contents of yymsg.
+
+AT_SETUP([[parse.error=verbose overflow]])
+
+AT_DATA_GRAMMAR([input.y],
+[[%code {
+ #include <stdio.h>
+ void yyerror (char const *);
+ int yylex (void);
+
+ /* This prevents this test case from having to induce error messages
+ large enough to overflow size_t. */
+ #define YYSIZE_T unsigned char
+
+ /* Bring in malloc so yacc.c doesn't try to provide a malloc prototype
+ using our YYSIZE_T. */
+ #include <stdlib.h>
+
+ /* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and
+ we don't want gcc to warn everywhere this constant would be too big
+ to make sense for our YYSIZE_T. */
+ #define YYMAXDEPTH 100
+}
+
+%define parse.error verbose
+
+%%
+
+start: syntax_error1 check syntax_error2 ;
+
+// Induce a syntax error message whose total length causes yymsg in
+// yyparse to be reallocated to size YYSTACK_ALLOC_MAXIMUM, which
+// should be 255. Each token here is 64 bytes.
+syntax_error1:
+ "123456789112345678921234567893123456789412345678951234567896123A"
+| "123456789112345678921234567893123456789412345678951234567896123B"
+| "123456789112345678921234567893123456789412345678951234567896123C"
+| error 'a' 'b' 'c'
+;
+
+check:
+{
+ if (yymsg_alloc != YYSTACK_ALLOC_MAXIMUM
+ || YYSTACK_ALLOC_MAXIMUM != YYSIZE_MAXIMUM
+ || YYSIZE_MAXIMUM != 255)
+ {
+ fprintf (stderr,
+ "The assumptions of this test group are no longer\n"
+ "valid, so it may no longer catch the error it was\n"
+ "designed to catch. Specifically, the following\n"
+ "values should all be 255:\n\n");
+ fprintf (stderr, " yymsg_alloc = %d\n", yymsg_alloc);
+ fprintf (stderr, " YYSTACK_ALLOC_MAXIMUM = %d\n",
+ YYSTACK_ALLOC_MAXIMUM);
+ fprintf (stderr, " YYSIZE_MAXIMUM = %d\n", YYSIZE_MAXIMUM);
+ YYABORT;
+ }
+}
+;
+
+// Now overflow.
+syntax_error2:
+ "123456789112345678921234567893123456789412345678951234567896123A"
+| "123456789112345678921234567893123456789412345678951234567896123B"
+| "123456789112345678921234567893123456789412345678951234567896123C"
+| "123456789112345678921234567893123456789412345678951234567896123D"
+| "123456789112345678921234567893123456789412345678951234567896123E"
+;
+
+%%
+
+void
+yyerror (char const *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+int
+yylex (void)
+{
+ /* Induce two syntax error messages (which requires full error
+ recovery by shifting 3 tokens). */
+ static char const *input = "abc";
+ return *input++;
+}
+
+int
+main (void)
+{
+ /* Push parsers throw away the message buffer between tokens, so skip
+ this test under maintainer-push-check. */
+ if (YYPUSH)
+ return 77;
+ return yyparse ();
+}
+]])
+
+AT_BISON_CHECK([[-o input.c input.y]])
+
+# gcc warns about tautologies and fallacies involving comparisons for
+# unsigned char. However, it doesn't produce these same warnings for
+# size_t and many other types when the warnings would seem to make just
+# as much sense. We ignore the warnings.
+[CFLAGS="$NO_WERROR_CFLAGS"]
+AT_COMPILE([[input]])
+
+AT_PARSER_CHECK([[./input]], [[2]], [],
+[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B or 123456789112345678921234567893123456789412345678951234567896123C
+syntax error
+memory exhausted
+]])
+
+AT_CLEANUP
projects / bison.git / blobdiff