[bison.git] / tests / input.at

# Checking the Bison scanner.                    -*- Autotest -*-
# Copyright (C) 2002, 2003, 2004, 2005, 2006 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
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

AT_BANNER([[Input Processing.]])

# Mostly test that we are robust to mistakes.


## ------------ ##
## Invalid $n.  ##
## ------------ ##

AT_SETUP([Invalid \$n and @n])

AT_DATA([input.y],
[[%%
exp: { $$ = $1 ; };
exp: { @$ = @1 ; };
]])

AT_CHECK([bison input.y], [1], [],
[[input.y:2.13-14: integer out of range: `$1'
input.y:3.13-14: integer out of range: `@1'
]])

AT_CLEANUP


## -------------- ##
## Type Clashes.  ##
## -------------- ##

AT_SETUP([Type Clashes])

AT_DATA([input.y],
[[%union { int bar; }
%token foo
%type <bar> exp
%%
exp: foo { $$; } foo { $2; } foo
   | foo
   | /* Empty. */
   ;
]])

AT_CHECK([bison input.y], [1], [],
[[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
input.y:5.24-25: $2 of `exp' has no declared type
input.y:5.6-32: warning: type clash on default action: <bar> != <>
input.y:6.6-8: warning: type clash on default action: <bar> != <>
input.y:7.5: warning: empty rule for typed nonterminal, and no action
]])

AT_CLEANUP


# _AT_UNUSED_VALUES_DECLARATIONS()
# --------------------------------------------
# Generate the token, type, and destructor
# declarations for the unused values tests.

m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
[[[%token <integer> INT;
%type <integer> a b c d e f g h i j k l;
%destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])


# AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER)
# --------------------------------------------
# Generate a grammar to test unused values,
# compile it, run it.  If DECLARATIONS_AFTER
# is set, then the token, type, and destructor
# declarations are generated after the rules
# rather than before.

m4_define([AT_CHECK_UNUSED_VALUES],
[AT_DATA([input.y],
m4_ifval($1, [


], [_AT_UNUSED_VALUES_DECLARATIONS
])[[%%
start:
  'a' a { $]2[ } | 'b' b { $]2[ } | 'c' c { $]2[ } | 'd' d { $]2[ } | 'e' e { $]2[ }
| 'f' f { $]2[ } | 'g' g { $]2[ } | 'h' h { $]2[ } | 'i' i { $]2[ } | 'j' j { $]2[ }
| 'k' k { $]2[ } | 'l' l { $]2[ }
;

a: INT | INT { } INT { } INT { };
b: INT | /* empty */;
c: INT | INT { $]1[ } INT { } INT { };
d: INT | INT { } INT { $]1[ } INT { };
e: INT | INT { } INT {  } INT { $]1[ };
f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
_AT_UNUSED_VALUES_DECLARATIONS])
)

AT_CHECK([bison input.y], [0], [],
[[input.y:11.10-32: warning: unset value: $]$[
input.y:11.10-32: warning: unused value: $]1[
input.y:11.10-32: warning: unused value: $]3[
input.y:11.10-32: warning: unused value: $]5[
input.y:12.9: warning: empty rule for typed nonterminal, and no action
input.y:13.10-35: warning: unset value: $]$[
input.y:13.10-35: warning: unused value: $]3[
input.y:13.10-35: warning: unused value: $]5[
input.y:14.10-35: warning: unset value: $]$[
input.y:14.10-35: warning: unused value: $]3[
input.y:14.10-35: warning: unused value: $]5[
input.y:15.10-36: warning: unset value: $]$[
input.y:15.10-36: warning: unused value: $]3[
input.y:15.10-36: warning: unused value: $]5[
input.y:17.10-58: warning: unset value: $]$[
input.y:17.10-58: warning: unused value: $]1[
input.y:17.10-58: warning: unused value: $]2[
input.y:17.10-58: warning: unused value: $]3[
input.y:17.10-58: warning: unused value: $]4[
input.y:17.10-58: warning: unused value: $]5[
input.y:18.10-72: warning: unset value: $]$[
input.y:18.10-72: warning: unused value: $]1[
input.y:18.10-72: warning: unused value: $]3[
input.y:18.10-72: warning: unused value: $]4[
input.y:18.10-72: warning: unused value: $]5[
input.y:20.10-55: warning: unused value: $]3[
input.y:21.10-68: warning: unset value: $]$[
input.y:21.10-68: warning: unused value: $]1[
input.y:21.10-68: warning: unused value: $]2[
input.y:21.10-68: warning: unused value: $]4[
]])])


## --------------- ##
## Unused values.  ##
## --------------- ##

AT_SETUP([Unused values])
AT_CHECK_UNUSED_VALUES
AT_CLEANUP


## ------------------------------------------ ##
## Unused values before symbol declarations.  ##
## ------------------------------------------ ##

AT_SETUP([Unused values before symbol declarations])
AT_CHECK_UNUSED_VALUES([1])
AT_CLEANUP


## --------------------------------------------- ##
## Default %printer and %destructor redeclared.  ##
## --------------------------------------------- ##

AT_SETUP([Default %printer and %destructor redeclared])

AT_DATA([[input.y]],
[[%destructor { destroy ($$); } %symbol-default
%printer { destroy ($$); } %symbol-default

%destructor { destroy ($$); } %symbol-default
%printer { destroy ($$); } %symbol-default

%%

start: ;

%destructor { destroy ($$); } %symbol-default;
%printer { destroy ($$); } %symbol-default;
]])

AT_CHECK([bison input.y], [1], [],
[[input.y:4.13-29: redeclaration for default %destructor
input.y:1.13-29: previous declaration
input.y:5.10-26: redeclaration for default %printer
input.y:2.10-26: previous declaration
input.y:11.13-29: redeclaration for default %destructor
input.y:4.13-29: previous declaration
input.y:12.10-26: redeclaration for default %printer
input.y:5.10-26: previous declaration
]])

AT_CLEANUP


## ---------------------------------------- ##
## Unused values with default %destructor.  ##
## ---------------------------------------- ##

AT_SETUP([Unused values with default %destructor])

AT_DATA([[input.y]],
[[%destructor { destroy ($$); } %symbol-default

%%

start: end end { $1; } ;
end: { }  ;
]])

AT_CHECK([bison input.y], [0], [],
[[input.y:5.8-22: warning: unset value: $$
input.y:5.8-22: warning: unused value: $2
input.y:6.6-8: warning: unset value: $$
]])

AT_CLEANUP


## ---------------------- ##
## Incompatible Aliases.  ##
## ---------------------- ##

AT_SETUP([Incompatible Aliases])

AT_DATA([input.y],
[[%token foo "foo"

%type <bar>       foo
%printer {bar}    foo
%destructor {bar} foo
%left             foo

%type <baz>       "foo"
%printer {baz}    "foo"
%destructor {baz} "foo"
%left             "foo"

%%
exp: foo;
]])

AT_CHECK([bison input.y], [1], [],
[[input.y:8.7-11: %type redeclaration for foo
input.y:3.7-11: previous declaration
input.y:10.13-17: %destructor redeclaration for foo
input.y:5.13-17: previous declaration
input.y:9.10-14: %printer redeclaration for foo
input.y:4.10-14: previous declaration
input.y:11.1-5: %left redeclaration for foo
input.y:6.1-5: previous declaration
]])

AT_CLEANUP


## ----------------------- ##
## Torturing the Scanner.  ##
## ----------------------- ##

# Be sure to compile and run, so that the C compiler checks what
# we do.

AT_SETUP([Torturing the Scanner])


AT_DATA([input.y], [])
AT_CHECK([bison input.y], [1], [],
[[input.y:1.1: syntax error, unexpected end of file
]])


AT_DATA([input.y],
[{}
])
AT_CHECK([bison input.y], [1], [],
[[input.y:1.1-2: syntax error, unexpected {...}
]])


AT_DATA_GRAMMAR([input.y],
[[%{
/* This is seen in GCC: a %{ and %} in middle of a comment. */
const char *foo = "So %{ and %} can be here too.";

#if 0
/* These examples test Bison while not stressing C compilers too much.
   Many C compilers mishandle backslash-newlines, so this part of the
   test is inside "#if 0".  The comment and string are written so that
   the "#endif" will be seen regardless of the C compiler bugs that we
   know about, namely:

     HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
     comment.

     The Apple Darwin compiler (as of late 2002) mishandles
     \\[newline]' within a character constant.

   */

/\
* A comment with backslash-newlines in it. %} *\
\
/
/* { Close the above comment, if the C compiler mishandled it.  */

char str[] = "\\
" A string with backslash-newlines in it %{ %} \\
\
"";

char apostrophe = '\'';
#endif

#include <stdio.h>
%}
/* %{ and %} can be here too. */

%{
/* Exercise pre-prologue dependency to %union.  */
typedef int value;
%}

/* Exercise M4 quoting: '@:>@@:>@', 0.  */

/* Also exercise %union. */
%union
{
  value ival; /* A comment to exercise an old bug. */
};


/* Exercise post-prologue dependency to %union.  */
%{
static YYSTYPE value_as_yystype (value val);

/* Exercise quotes in declarations.  */
char quote[] = "@:>@@:>@,";
%}

%{
static void yyerror (const char *s);
static int yylex (void);
%}

%type <ival> '@<:@'

/* Exercise quotes in strings.  */
%token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"

%%
/* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
  {
    /* Exercise quotes in braces.  */
    char tmp[] = "@<:@%c@:>@,\n";
    printf (tmp, $1);
  }
;

two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
output.or.oline.opt: ;|oline;;|output;;;
output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
%%
/* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */

static YYSTYPE
value_as_yystype (value val)
{
  YYSTYPE res;
  res.ival = val;
  return res;
}

static int
yylex (void)
{
  static const char *input = "@<:@\1\2$@{@oline@__@&t@oline__\
#output "; /* "
  */
  yylval = value_as_yystype (*input);
  return *input++;
}

static void
yyerror (const char *msg)
{
  fprintf (stderr, "%s\n", msg);
}
]])

# Pacify Emacs'font-lock-mode: "

AT_DATA([main.c],
[[typedef int value;
#include "input.h"

int yyparse (void);

int
main (void)
{
  return yyparse ();
}
]])

AT_CHECK([bison -d -v -o input.c input.y])
AT_COMPILE([input.o], [-c input.c])
AT_COMPILE([main.o], [-c main.c])
AT_COMPILE([input], [input.o main.o])
AT_PARSER_CHECK([./input], 0,
[[[@<:@],
]])

AT_CLEANUP


## ---------------------- ##
## Typed symbol aliases.  ##
## ---------------------- ##

AT_SETUP([Typed symbol aliases])

# Bison 2.0 broke typed symbol aliases - ensure they work.

AT_DATA_GRAMMAR([input.y],
[[%union
{
  int val;
};
%token <val> MY_TOKEN "MY TOKEN"
%type <val> exp
%%
exp: "MY TOKEN";
%%
]])

AT_CHECK([bison -o input.c input.y])

AT_CLEANUP


## --------- ##
## Require.  ##
## --------- ##

m4_define([AT_CHECK_REQUIRE],
[AT_SETUP([Require $1])
AT_DATA_GRAMMAR([input.y],
[[%require "$1";
%%
empty_file:;
]])
AT_CHECK([bison -o input.c input.y], $2, [], ignore)
AT_CLEANUP
])

AT_CHECK_REQUIRE(1.0, 0)
AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
## FIXME: Some day augment this version number.
AT_CHECK_REQUIRE(100.0, 63)


## ------------------------------------- ##
## String aliases for character tokens.  ##
## ------------------------------------- ##

AT_SETUP([String aliases for character tokens])

# Bison once thought a character token and its alias were different symbols
# with the same user token number.

AT_DATA_GRAMMAR([input.y],
[[%token 'a' "a"
%%
start: 'a';
%%
]])

AT_CHECK([bison -o input.c input.y])

AT_CLEANUP


## --------------------- ##
## Unclosed constructs.  ##
## --------------------- ##

AT_SETUP([Unclosed constructs])

# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
# they were prepended to whatever it STRING_GROW'ed next.  It also threw them
# away rather than returning them to the parser.  The effect was confusing
# subsequent error messages.

AT_DATA([input.y],
[[%token A "a
%token B "b"
%token AB "ab" // Used to complain that "ab" was already used.
%token C '1
%token TWO "2"
%token TICK_TWELVE "'12" // Used to complain that "'12" was already used.

%%

start: ;

// Used to report a syntax error because it didn't see any kind of symbol
// identifier.
%type <f> 'a
;
%type <f> "a
;
// Used to report a syntax error because it didn't see braced code.
%destructor { free ($$)
]])

AT_CHECK([bison -o input.c input.y], 1, [],
[[input.y:1.10-2.0: missing `"' at end of line
input.y:4.10-5.0: missing `'' at end of line
input.y:14.11-15.0: missing `'' at end of line
input.y:16.11-17.0: missing `"' at end of line
input.y:19.13-20.0: missing `}' at end of file
input.y:20.1: syntax error, unexpected end of file
]])

AT_CLEANUP


## ------------------------- ##
## %start after first rule.  ##
## ------------------------- ##

AT_SETUP([%start after first rule])

# Bison once complained that a %start after the first rule was a redeclaration
# of the start symbol.

AT_DATA([input.y],
[[%%
false_start: ;
start: false_start ;
%start start;
]])

AT_CHECK([bison -o input.c input.y])

AT_CLEANUP
Commit	Line	Data
087b9fdf	1	# Checking the Bison scanner. -- Autotest --
378f4bd8	2	# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
9b2d0677 AD	3
	4	# This program is free software; you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License as published by
	6	# the Free Software Foundation; either version 2, or (at your option)
	7	# any later version.
	8
	9	# This program is distributed in the hope that it will be useful,
	10	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	# GNU General Public License for more details.
	13
	14	# You should have received a copy of the GNU General Public License
	15	# along with this program; if not, write to the Free Software
0fb669f9 PE	16	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
0fb669f9 PE	17	# 02110-1301, USA.
9b2d0677 AD	18
	19	AT_BANNER([[Input Processing.]])
	20
	21	# Mostly test that we are robust to mistakes.
	22
6c35d22c	23
9b2d0677 AD	24	## ------------ ##
	25	## Invalid $n. ##
	26	## ------------ ##
	27
e9071366	28	AT_SETUP([Invalid \$n and @n])
9b2d0677 AD	29
	30	AT_DATA([input.y],
	31	[[%%
bfcf1f3a	32	exp: { $$ = $1 ; };
bfcf1f3a	33	exp: { @$ = @1 ; };
9b2d0677 AD	34	]])
	35
	36	AT_CHECK([bison input.y], [1], [],
e9071366 AD	37	[[input.y:2.13-14: integer out of range: `$1'
e9071366 AD	38	input.y:3.13-14: integer out of range: `@1'
9b2d0677 AD	39	]])
	40
	41	AT_CLEANUP
9af3fbce AD	42
	43
	44	## -------------- ##
e776192e	45	## Type Clashes. ##
9af3fbce AD	46	## -------------- ##
9af3fbce AD	47
e776192e	48	AT_SETUP([Type Clashes])
9af3fbce AD	49
9af3fbce AD	50	AT_DATA([input.y],
ffa4ba3a JD	51	[[%union { int bar; }
ffa4ba3a JD	52	%token foo
9af3fbce AD	53	%type <bar> exp
9af3fbce AD	54	%%
ffa4ba3a	55	exp: foo { $$; } foo { $2; } foo
9af3fbce AD	56	\| foo
	57	\| /* Empty. */
	58	;
	59	]])
	60
ffa4ba3a JD	61	AT_CHECK([bison input.y], [1], [],
	62	[[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
	63	input.y:5.24-25: $2 of `exp' has no declared type
	64	input.y:5.6-32: warning: type clash on default action: <bar> != <>
	65	input.y:6.6-8: warning: type clash on default action: <bar> != <>
	66	input.y:7.5: warning: empty rule for typed nonterminal, and no action
9af3fbce AD	67	]])
	68
	69	AT_CLEANUP
5a08f1ce AD	70
5a08f1ce AD	71
ffa4ba3a JD	72	# _AT_UNUSED_VALUES_DECLARATIONS()
	73	# --------------------------------------------
	74	# Generate the token, type, and destructor
	75	# declarations for the unused values tests.
378f4bd8	76
ffa4ba3a JD	77	m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
	78	[[[%token <integer> INT;
	79	%type <integer> a b c d e f g h i j k l;
	80	%destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
378f4bd8	81
ffa4ba3a JD	82
	83	# AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER)
	84	# --------------------------------------------
	85	# Generate a grammar to test unused values,
	86	# compile it, run it. If DECLARATIONS_AFTER
	87	# is set, then the token, type, and destructor
	88	# declarations are generated after the rules
	89	# rather than before.
	90
	91	m4_define([AT_CHECK_UNUSED_VALUES],
	92	[AT_DATA([input.y],
	93	m4_ifval($1, [
	94
	95
	96	], [_AT_UNUSED_VALUES_DECLARATIONS
	97	])[[%%
27622431	98	start:
ffa4ba3a JD	99	'a' a { $]2[ } \| 'b' b { $]2[ } \| 'c' c { $]2[ } \| 'd' d { $]2[ } \| 'e' e { $]2[ }
	100	\| 'f' f { $]2[ } \| 'g' g { $]2[ } \| 'h' h { $]2[ } \| 'i' i { $]2[ } \| 'j' j { $]2[ }
	101	\| 'k' k { $]2[ } \| 'l' l { $]2[ }
378f4bd8	102	;
27622431 PE	103
	104	a: INT \| INT { } INT { } INT { };
	105	b: INT \| /* empty */;
ffa4ba3a JD	106	c: INT \| INT { $]1[ } INT { } INT { };
	107	d: INT \| INT { } INT { $]1[ } INT { };
	108	e: INT \| INT { } INT { } INT { $]1[ };
	109	f: INT \| INT { } INT { } INT { $]$[ = $]1[ + $]3[ + $]5[; };
ddc8ede1 PE	110	g: INT \| INT { $<integer>$; } INT { $<integer>$; } INT { };
ddc8ede1 PE	111	h: INT \| INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
ffa4ba3a JD	112	i: INT \| INT INT { } { $]$[ = $]1[ + $]2[; };
ffa4ba3a JD	113	j: INT \| INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
ddc8ede1 PE	114	k: INT \| INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
ddc8ede1 PE	115	l: INT \| INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
ffa4ba3a JD	116	_AT_UNUSED_VALUES_DECLARATIONS])
	117	)
	118
	119	AT_CHECK([bison input.y], [0], [],
	120	[[input.y:11.10-32: warning: unset value: $]$[
	121	input.y:11.10-32: warning: unused value: $]1[
	122	input.y:11.10-32: warning: unused value: $]3[
	123	input.y:11.10-32: warning: unused value: $]5[
	124	input.y:12.9: warning: empty rule for typed nonterminal, and no action
	125	input.y:13.10-35: warning: unset value: $]$[
	126	input.y:13.10-35: warning: unused value: $]3[
	127	input.y:13.10-35: warning: unused value: $]5[
	128	input.y:14.10-35: warning: unset value: $]$[
	129	input.y:14.10-35: warning: unused value: $]3[
	130	input.y:14.10-35: warning: unused value: $]5[
	131	input.y:15.10-36: warning: unset value: $]$[
	132	input.y:15.10-36: warning: unused value: $]3[
	133	input.y:15.10-36: warning: unused value: $]5[
ddc8ede1 PE	134	input.y:17.10-58: warning: unset value: $]$[
	135	input.y:17.10-58: warning: unused value: $]1[
	136	input.y:17.10-58: warning: unused value: $]2[
	137	input.y:17.10-58: warning: unused value: $]3[
	138	input.y:17.10-58: warning: unused value: $]4[
	139	input.y:17.10-58: warning: unused value: $]5[
	140	input.y:18.10-72: warning: unset value: $]$[
	141	input.y:18.10-72: warning: unused value: $]1[
	142	input.y:18.10-72: warning: unused value: $]3[
	143	input.y:18.10-72: warning: unused value: $]4[
	144	input.y:18.10-72: warning: unused value: $]5[
ffa4ba3a	145	input.y:20.10-55: warning: unused value: $]3[
ddc8ede1 PE	146	input.y:21.10-68: warning: unset value: $]$[
	147	input.y:21.10-68: warning: unused value: $]1[
	148	input.y:21.10-68: warning: unused value: $]2[
	149	input.y:21.10-68: warning: unused value: $]4[
ffa4ba3a	150	]])])
27622431	151
378f4bd8	152
ffa4ba3a JD	153	## --------------- ##
	154	## Unused values. ##
	155	## --------------- ##
	156
	157	AT_SETUP([Unused values])
	158	AT_CHECK_UNUSED_VALUES
	159	AT_CLEANUP
	160
	161
	162	## ------------------------------------------ ##
	163	## Unused values before symbol declarations. ##
	164	## ------------------------------------------ ##
84866159	165
ffa4ba3a JD	166	AT_SETUP([Unused values before symbol declarations])
ffa4ba3a JD	167	AT_CHECK_UNUSED_VALUES([1])
84866159	168	AT_CLEANUP
378f4bd8 AD	169
378f4bd8 AD	170
ec5479ce JD	171	## --------------------------------------------- ##
	172	## Default %printer and %destructor redeclared. ##
	173	## --------------------------------------------- ##
	174
	175	AT_SETUP([Default %printer and %destructor redeclared])
	176
	177	AT_DATA([[input.y]],
3be03b13 JD	178	[[%destructor { destroy ($$); } %symbol-default
3be03b13 JD	179	%printer { destroy ($$); } %symbol-default
ec5479ce	180
3be03b13 JD	181	%destructor { destroy ($$); } %symbol-default
3be03b13 JD	182	%printer { destroy ($$); } %symbol-default
ec5479ce JD	183
	184	%%
	185
	186	start: ;
	187
3be03b13 JD	188	%destructor { destroy ($$); } %symbol-default;
3be03b13 JD	189	%printer { destroy ($$); } %symbol-default;
ec5479ce JD	190	]])
	191
	192	AT_CHECK([bison input.y], [1], [],
	193	[[input.y:4.13-29: redeclaration for default %destructor
	194	input.y:1.13-29: previous declaration
	195	input.y:5.10-26: redeclaration for default %printer
	196	input.y:2.10-26: previous declaration
	197	input.y:11.13-29: redeclaration for default %destructor
	198	input.y:4.13-29: previous declaration
	199	input.y:12.10-26: redeclaration for default %printer
	200	input.y:5.10-26: previous declaration
	201	]])
	202
	203	AT_CLEANUP
	204
	205
	206	## ---------------------------------------- ##
	207	## Unused values with default %destructor. ##
	208	## ---------------------------------------- ##
	209
	210	AT_SETUP([Unused values with default %destructor])
	211
	212	AT_DATA([[input.y]],
3be03b13	213	[[%destructor { destroy ($$); } %symbol-default
ec5479ce JD	214
	215	%%
	216
	217	start: end end { $1; } ;
	218	end: { } ;
	219	]])
	220
	221	AT_CHECK([bison input.y], [0], [],
	222	[[input.y:5.8-22: warning: unset value: $$
	223	input.y:5.8-22: warning: unused value: $2
	224	input.y:6.6-8: warning: unset value: $$
	225	]])
	226
	227	AT_CLEANUP
	228
	229
df09ef2e AD	230	## ---------------------- ##
	231	## Incompatible Aliases. ##
	232	## ---------------------- ##
	233
	234	AT_SETUP([Incompatible Aliases])
	235
	236	AT_DATA([input.y],
	237	[[%token foo "foo"
	238
	239	%type <bar> foo
	240	%printer {bar} foo
	241	%destructor {bar} foo
	242	%left foo
	243
	244	%type <baz> "foo"
	245	%printer {baz} "foo"
	246	%destructor {baz} "foo"
	247	%left "foo"
	248
	249	%%
	250	exp: foo;
	251	]])
	252
	253	AT_CHECK([bison input.y], [1], [],
	254	[[input.y:8.7-11: %type redeclaration for foo
dd60572a	255	input.y:3.7-11: previous declaration
df09ef2e	256	input.y:10.13-17: %destructor redeclaration for foo
dd60572a	257	input.y:5.13-17: previous declaration
e2a8c0f5	258	input.y:9.10-14: %printer redeclaration for foo
dd60572a	259	input.y:4.10-14: previous declaration
df09ef2e	260	input.y:11.1-5: %left redeclaration for foo
dd60572a	261	input.y:6.1-5: previous declaration
df09ef2e AD	262	]])
	263
	264	AT_CLEANUP
	265
	266
5a08f1ce AD	267
	268	## ----------------------- ##
	269	## Torturing the Scanner. ##
	270	## ----------------------- ##
	271
	272	# Be sure to compile and run, so that the C compiler checks what
	273	# we do.
	274
	275	AT_SETUP([Torturing the Scanner])
	276
0baf7c50 PE	277
	278	AT_DATA([input.y], [])
	279	AT_CHECK([bison input.y], [1], [],
4a678af8	280	[[input.y:1.1: syntax error, unexpected end of file
0baf7c50 PE	281	]])
	282
	283
e9071366	284	AT_DATA([input.y],
b2ddc3f3 AD	285	[{}
	286	])
	287	AT_CHECK([bison input.y], [1], [],
4a678af8	288	[[input.y:1.1-2: syntax error, unexpected {...}
b2ddc3f3 AD	289	]])
	290
	291
9501dc6e	292	AT_DATA_GRAMMAR([input.y],
5a08f1ce AD	293	[[%{
	294	/* This is seen in GCC: a %{ and %} in middle of a comment. */
	295	const char *foo = "So %{ and %} can be here too.";
	296
dda7a53e PE	297	#if 0
	298	/* These examples test Bison while not stressing C compilers too much.
	299	Many C compilers mishandle backslash-newlines, so this part of the
	300	test is inside "#if 0". The comment and string are written so that
	301	the "#endif" will be seen regardless of the C compiler bugs that we
	302	know about, namely:
	303
	304	HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
	305	comment.
	306
	307	The Apple Darwin compiler (as of late 2002) mishandles
	308	\\[newline]' within a character constant.
	309
	310	*/
	311
206fe6a5	312	/\
dda7a53e PE	313	* A comment with backslash-newlines in it. %} *\
dda7a53e PE	314	\
206fe6a5	315	/
dda7a53e	316	/* { Close the above comment, if the C compiler mishandled it. */
206fe6a5 PE	317
	318	char str[] = "\\
	319	" A string with backslash-newlines in it %{ %} \\
dda7a53e	320	\
206fe6a5 PE	321	"";
206fe6a5 PE	322
dda7a53e	323	char apostrophe = '\'';
206fe6a5 PE	324	#endif
206fe6a5 PE	325
5a08f1ce AD	326	#include <stdio.h>
	327	%}
	328	/* %{ and %} can be here too. */
	329
	330	%{
	331	/* Exercise pre-prologue dependency to %union. */
051ade83	332	typedef int value;
5a08f1ce AD	333	%}
	334
	335	/* Exercise M4 quoting: '@:>@@:>@', 0. */
	336
	337	/* Also exercise %union. */
	338	%union
	339	{
051ade83	340	value ival; /* A comment to exercise an old bug. */
5a08f1ce AD	341	};
	342
	343
	344	/* Exercise post-prologue dependency to %union. */
	345	%{
051ade83	346	static YYSTYPE value_as_yystype (value val);
5a08f1ce AD	347
	348	/* Exercise quotes in declarations. */
	349	char quote[] = "@:>@@:>@,";
	350	%}
	351
	352	%{
	353	static void yyerror (const char *s);
	354	static int yylex (void);
	355	%}
	356
206fe6a5	357	%type <ival> '@<:@'
5a08f1ce AD	358
5a08f1ce AD	359	/* Exercise quotes in strings. */
3dc4c5fa	360	%token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
5a08f1ce AD	361
5a08f1ce AD	362	%%
206fe6a5	363	/* Exercise M4 quoting: '@:>@@:>@', @<:@, 1. */
087b9fdf	364	exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
5a08f1ce AD	365	{
	366	/* Exercise quotes in braces. */
	367	char tmp[] = "@<:@%c@:>@,\n";
	368	printf (tmp, $1);
	369	}
	370	;
5b7f88c7 PE	371
	372	two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
	373	oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
087b9fdf	374	output.or.oline.opt: ;\|oline;;\|output;;;
5b7f88c7	375	output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
5a08f1ce	376	%%
206fe6a5	377	/* Exercise M4 quoting: '@:>@@:>@', @<:@, 2. */
5a08f1ce AD	378
5a08f1ce AD	379	static YYSTYPE
051ade83	380	value_as_yystype (value val)
5a08f1ce AD	381	{
	382	YYSTYPE res;
	383	res.ival = val;
	384	return res;
	385	}
	386
	387	static int
	388	yylex (void)
	389	{
5b7f88c7 PE	390	static const char *input = "@<:@\1\2$@{@oline@__@&t@oline__\
	391	#output "; /* "
	392	*/
051ade83	393	yylval = value_as_yystype (*input);
5a08f1ce AD	394	return *input++;
	395	}
	396
	397	static void
	398	yyerror (const char *msg)
	399	{
	400	fprintf (stderr, "%s\n", msg);
	401	}
	402	]])
	403
9501dc6e AD	404	# Pacify Emacs'font-lock-mode: "
9501dc6e AD	405
5a08f1ce	406	AT_DATA([main.c],
051ade83	407	[[typedef int value;
5a08f1ce AD	408	#include "input.h"
	409
	410	int yyparse (void);
	411
	412	int
	413	main (void)
	414	{
	415	return yyparse ();
	416	}
	417	]])
	418
b56471a6	419	AT_CHECK([bison -d -v -o input.c input.y])
efc6bf1b PE	420	AT_COMPILE([input.o], [-c input.c])
	421	AT_COMPILE([main.o], [-c main.c])
	422	AT_COMPILE([input], [input.o main.o])
1154cced	423	AT_PARSER_CHECK([./input], 0,
206fe6a5	424	[[[@<:@],
5a08f1ce AD	425	]])
	426
	427	AT_CLEANUP
e59adf8f PE	428
	429
	430	## ---------------------- ##
	431	## Typed symbol aliases. ##
	432	## ---------------------- ##
	433
	434	AT_SETUP([Typed symbol aliases])
	435
	436	# Bison 2.0 broke typed symbol aliases - ensure they work.
	437
	438	AT_DATA_GRAMMAR([input.y],
	439	[[%union
	440	{
	441	int val;
	442	};
	443	%token <val> MY_TOKEN "MY TOKEN"
	444	%type <val> exp
	445	%%
	446	exp: "MY TOKEN";
	447	%%
	448	]])
	449
	450	AT_CHECK([bison -o input.c input.y])
	451
	452	AT_CLEANUP
b50d2359 AD	453
	454
	455	## --------- ##
	456	## Require. ##
	457	## --------- ##
	458
	459	m4_define([AT_CHECK_REQUIRE],
	460	[AT_SETUP([Require $1])
	461	AT_DATA_GRAMMAR([input.y],
	462	[[%require "$1";
	463	%%
	464	empty_file:;
	465	]])
	466	AT_CHECK([bison -o input.c input.y], $2, [], ignore)
	467	AT_CLEANUP
	468	])
	469
	470	AT_CHECK_REQUIRE(1.0, 0)
	471	AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
	472	## FIXME: Some day augment this version number.
9b8a5ce0	473	AT_CHECK_REQUIRE(100.0, 63)
1f6b3679 JD	474
	475
	476	## ------------------------------------- ##
	477	## String aliases for character tokens. ##
	478	## ------------------------------------- ##
	479
	480	AT_SETUP([String aliases for character tokens])
	481
	482	# Bison once thought a character token and its alias were different symbols
	483	# with the same user token number.
	484
	485	AT_DATA_GRAMMAR([input.y],
	486	[[%token 'a' "a"
	487	%%
	488	start: 'a';
	489	%%
	490	]])
	491
	492	AT_CHECK([bison -o input.c input.y])
	493
	494	AT_CLEANUP
47aee066 JD	495
	496
	497	## --------------------- ##
	498	## Unclosed constructs. ##
	499	## --------------------- ##
	500
	501	AT_SETUP([Unclosed constructs])
	502
	503	# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
	504	# they were prepended to whatever it STRING_GROW'ed next. It also threw them
	505	# away rather than returning them to the parser. The effect was confusing
	506	# subsequent error messages.
	507
	508	AT_DATA([input.y],
	509	[[%token A "a
	510	%token B "b"
	511	%token AB "ab" // Used to complain that "ab" was already used.
	512	%token C '1
	513	%token TWO "2"
	514	%token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
	515
	516	%%
	517
	518	start: ;
	519
	520	// Used to report a syntax error because it didn't see any kind of symbol
	521	// identifier.
	522	%type <f> 'a
	523	;
	524	%type <f> "a
	525	;
	526	// Used to report a syntax error because it didn't see braced code.
	527	%destructor { free ($$)
	528	]])
	529
	530	AT_CHECK([bison -o input.c input.y], 1, [],
	531	[[input.y:1.10-2.0: missing `"' at end of line
	532	input.y:4.10-5.0: missing `'' at end of line
	533	input.y:14.11-15.0: missing `'' at end of line
	534	input.y:16.11-17.0: missing `"' at end of line
	535	input.y:19.13-20.0: missing `}' at end of file
3be03b13	536	input.y:20.1: syntax error, unexpected end of file
47aee066 JD	537	]])
	538
	539	AT_CLEANUP
4d7370cb JD	540
	541
	542	## ------------------------- ##
	543	## %start after first rule. ##
	544	## ------------------------- ##
	545
	546	AT_SETUP([%start after first rule])
	547
	548	# Bison once complained that a %start after the first rule was a redeclaration
	549	# of the start symbol.
	550
	551	AT_DATA([input.y],
	552	[[%%
	553	false_start: ;
	554	start: false_start ;
	555	%start start;
	556	]])
	557
	558	AT_CHECK([bison -o input.c input.y])
	559
	560	AT_CLEANUP