[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 ($$); } %symbol-default %symbol-default
%printer { destroy ($$); } %symbol-default %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:1.13-29: redeclaration for default %destructor
input.y:1.13-29: previous declaration
input.y:2.10-26: redeclaration for default %printer
input.y:2.10-26: previous declaration
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


## ---------------------------------------------- ##
## Per-type %printer and %destructor redeclared.  ##
## ---------------------------------------------- ##

AT_SETUP([Per-type %printer and %destructor redeclared])

AT_DATA([[input.y]],
[[%destructor { destroy ($$); } <field1> <field2>
%printer { destroy ($$); } <field1> <field2>

%destructor { destroy ($$); } <field1> <field1>
%printer { destroy ($$); } <field2> <field2>

%%

start: ;

%destructor { destroy ($$); } <field2> <field1>;
%printer { destroy ($$); } <field2> <field1>;
]])

AT_CHECK([bison input.y], [1], [],
[[input.y:4.13-29: %destructor redeclaration for <field1>
input.y:1.13-29: previous declaration
input.y:4.13-29: %destructor redeclaration for <field1>
input.y:4.13-29: previous declaration
input.y:5.10-26: %printer redeclaration for <field2>
input.y:2.10-26: previous declaration
input.y:5.10-26: %printer redeclaration for <field2>
input.y:5.10-26: previous declaration
input.y:11.13-29: %destructor redeclaration for <field1>
input.y:4.13-29: previous declaration
input.y:11.13-29: %destructor redeclaration for <field2>
input.y:1.13-29: previous declaration
input.y:12.10-26: %printer redeclaration for <field1>
input.y:2.10-26: previous declaration
input.y:12.10-26: %printer redeclaration for <field2>
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


## ----------------------------------------- ##
## Unused values with per-type %destructor.  ##
## ----------------------------------------- ##

AT_SETUP([Unused values with per-type %destructor])

AT_DATA([[input.y]],
[[%destructor { destroy ($$); } <field1>
%type <field1> start end

%%

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

AT_CHECK([bison input.y], [0], [],
[[input.y:6.8-22: warning: unset value: $$
input.y:6.8-22: warning: unused value: $2
input.y:7.6-8: warning: unset value: $$
]])

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>
#include <stdlib.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 char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
#output "; /* "
  */
  static size_t toknum;
  if (! (toknum < sizeof input))
    abort ();
  yylval = value_as_yystype (input[toknum]);
  return input[toknum++];
}

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]],
b2a0b7ca JD	178	[[%destructor { destroy ($$); } %symbol-default %symbol-default
b2a0b7ca JD	179	%printer { destroy ($$); } %symbol-default %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], [],
b2a0b7ca JD	193	[[input.y:1.13-29: redeclaration for default %destructor
	194	input.y:1.13-29: previous declaration
	195	input.y:2.10-26: redeclaration for default %printer
	196	input.y:2.10-26: previous declaration
	197	input.y:4.13-29: redeclaration for default %destructor
ec5479ce JD	198	input.y:1.13-29: previous declaration
	199	input.y:5.10-26: redeclaration for default %printer
	200	input.y:2.10-26: previous declaration
	201	input.y:11.13-29: redeclaration for default %destructor
	202	input.y:4.13-29: previous declaration
	203	input.y:12.10-26: redeclaration for default %printer
	204	input.y:5.10-26: previous declaration
	205	]])
	206
	207	AT_CLEANUP
	208
	209
b2a0b7ca JD	210	## ---------------------------------------------- ##
	211	## Per-type %printer and %destructor redeclared. ##
	212	## ---------------------------------------------- ##
	213
	214	AT_SETUP([Per-type %printer and %destructor redeclared])
	215
	216	AT_DATA([[input.y]],
	217	[[%destructor { destroy ($$); } <field1> <field2>
	218	%printer { destroy ($$); } <field1> <field2>
	219
	220	%destructor { destroy ($$); } <field1> <field1>
	221	%printer { destroy ($$); } <field2> <field2>
	222
	223	%%
	224
	225	start: ;
	226
	227	%destructor { destroy ($$); } <field2> <field1>;
	228	%printer { destroy ($$); } <field2> <field1>;
	229	]])
	230
	231	AT_CHECK([bison input.y], [1], [],
	232	[[input.y:4.13-29: %destructor redeclaration for <field1>
	233	input.y:1.13-29: previous declaration
	234	input.y:4.13-29: %destructor redeclaration for <field1>
	235	input.y:4.13-29: previous declaration
	236	input.y:5.10-26: %printer redeclaration for <field2>
	237	input.y:2.10-26: previous declaration
	238	input.y:5.10-26: %printer redeclaration for <field2>
	239	input.y:5.10-26: previous declaration
	240	input.y:11.13-29: %destructor redeclaration for <field1>
	241	input.y:4.13-29: previous declaration
	242	input.y:11.13-29: %destructor redeclaration for <field2>
	243	input.y:1.13-29: previous declaration
	244	input.y:12.10-26: %printer redeclaration for <field1>
	245	input.y:2.10-26: previous declaration
	246	input.y:12.10-26: %printer redeclaration for <field2>
	247	input.y:5.10-26: previous declaration
	248	]])
	249
	250	AT_CLEANUP
	251
	252
ec5479ce JD	253	## ---------------------------------------- ##
	254	## Unused values with default %destructor. ##
	255	## ---------------------------------------- ##
	256
	257	AT_SETUP([Unused values with default %destructor])
	258
	259	AT_DATA([[input.y]],
3be03b13	260	[[%destructor { destroy ($$); } %symbol-default
ec5479ce JD	261
	262	%%
	263
	264	start: end end { $1; } ;
	265	end: { } ;
	266	]])
	267
	268	AT_CHECK([bison input.y], [0], [],
	269	[[input.y:5.8-22: warning: unset value: $$
	270	input.y:5.8-22: warning: unused value: $2
	271	input.y:6.6-8: warning: unset value: $$
	272	]])
	273
	274	AT_CLEANUP
	275
	276
b2a0b7ca JD	277	## ----------------------------------------- ##
	278	## Unused values with per-type %destructor. ##
	279	## ----------------------------------------- ##
	280
	281	AT_SETUP([Unused values with per-type %destructor])
	282
	283	AT_DATA([[input.y]],
	284	[[%destructor { destroy ($$); } <field1>
	285	%type <field1> start end
	286
	287	%%
	288
	289	start: end end { $1; } ;
	290	end: { } ;
	291	]])
	292
	293	AT_CHECK([bison input.y], [0], [],
	294	[[input.y:6.8-22: warning: unset value: $$
	295	input.y:6.8-22: warning: unused value: $2
	296	input.y:7.6-8: warning: unset value: $$
	297	]])
	298
	299	AT_CLEANUP
	300
	301
df09ef2e AD	302	## ---------------------- ##
	303	## Incompatible Aliases. ##
	304	## ---------------------- ##
	305
	306	AT_SETUP([Incompatible Aliases])
	307
	308	AT_DATA([input.y],
	309	[[%token foo "foo"
	310
	311	%type <bar> foo
	312	%printer {bar} foo
	313	%destructor {bar} foo
	314	%left foo
	315
	316	%type <baz> "foo"
	317	%printer {baz} "foo"
	318	%destructor {baz} "foo"
	319	%left "foo"
	320
	321	%%
	322	exp: foo;
	323	]])
	324
	325	AT_CHECK([bison input.y], [1], [],
	326	[[input.y:8.7-11: %type redeclaration for foo
dd60572a	327	input.y:3.7-11: previous declaration
df09ef2e	328	input.y:10.13-17: %destructor redeclaration for foo
dd60572a	329	input.y:5.13-17: previous declaration
e2a8c0f5	330	input.y:9.10-14: %printer redeclaration for foo
dd60572a	331	input.y:4.10-14: previous declaration
df09ef2e	332	input.y:11.1-5: %left redeclaration for foo
dd60572a	333	input.y:6.1-5: previous declaration
df09ef2e AD	334	]])
	335
	336	AT_CLEANUP
	337
	338
5a08f1ce AD	339
	340	## ----------------------- ##
	341	## Torturing the Scanner. ##
	342	## ----------------------- ##
	343
	344	# Be sure to compile and run, so that the C compiler checks what
	345	# we do.
	346
	347	AT_SETUP([Torturing the Scanner])
	348
0baf7c50 PE	349
	350	AT_DATA([input.y], [])
	351	AT_CHECK([bison input.y], [1], [],
4a678af8	352	[[input.y:1.1: syntax error, unexpected end of file
0baf7c50 PE	353	]])
	354
	355
e9071366	356	AT_DATA([input.y],
b2ddc3f3 AD	357	[{}
	358	])
	359	AT_CHECK([bison input.y], [1], [],
4a678af8	360	[[input.y:1.1-2: syntax error, unexpected {...}
b2ddc3f3 AD	361	]])
	362
	363
9501dc6e	364	AT_DATA_GRAMMAR([input.y],
5a08f1ce AD	365	[[%{
	366	/* This is seen in GCC: a %{ and %} in middle of a comment. */
	367	const char *foo = "So %{ and %} can be here too.";
	368
dda7a53e PE	369	#if 0
	370	/* These examples test Bison while not stressing C compilers too much.
	371	Many C compilers mishandle backslash-newlines, so this part of the
	372	test is inside "#if 0". The comment and string are written so that
	373	the "#endif" will be seen regardless of the C compiler bugs that we
	374	know about, namely:
	375
	376	HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
	377	comment.
	378
	379	The Apple Darwin compiler (as of late 2002) mishandles
	380	\\[newline]' within a character constant.
	381
	382	*/
	383
206fe6a5	384	/\
dda7a53e PE	385	* A comment with backslash-newlines in it. %} *\
dda7a53e PE	386	\
206fe6a5	387	/
dda7a53e	388	/* { Close the above comment, if the C compiler mishandled it. */
206fe6a5 PE	389
	390	char str[] = "\\
	391	" A string with backslash-newlines in it %{ %} \\
dda7a53e	392	\
206fe6a5 PE	393	"";
206fe6a5 PE	394
dda7a53e	395	char apostrophe = '\'';
206fe6a5 PE	396	#endif
206fe6a5 PE	397
5a08f1ce	398	#include <stdio.h>
c4bd5bf7	399	#include <stdlib.h>
5a08f1ce AD	400	%}
	401	/* %{ and %} can be here too. */
	402
	403	%{
	404	/* Exercise pre-prologue dependency to %union. */
051ade83	405	typedef int value;
5a08f1ce AD	406	%}
	407
	408	/* Exercise M4 quoting: '@:>@@:>@', 0. */
	409
	410	/* Also exercise %union. */
	411	%union
	412	{
051ade83	413	value ival; /* A comment to exercise an old bug. */
5a08f1ce AD	414	};
	415
	416
	417	/* Exercise post-prologue dependency to %union. */
	418	%{
051ade83	419	static YYSTYPE value_as_yystype (value val);
5a08f1ce AD	420
	421	/* Exercise quotes in declarations. */
	422	char quote[] = "@:>@@:>@,";
	423	%}
	424
	425	%{
	426	static void yyerror (const char *s);
	427	static int yylex (void);
	428	%}
	429
206fe6a5	430	%type <ival> '@<:@'
5a08f1ce AD	431
5a08f1ce AD	432	/* Exercise quotes in strings. */
3dc4c5fa	433	%token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
5a08f1ce AD	434
5a08f1ce AD	435	%%
206fe6a5	436	/* Exercise M4 quoting: '@:>@@:>@', @<:@, 1. */
087b9fdf	437	exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
5a08f1ce AD	438	{
	439	/* Exercise quotes in braces. */
	440	char tmp[] = "@<:@%c@:>@,\n";
	441	printf (tmp, $1);
	442	}
	443	;
5b7f88c7 PE	444
	445	two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
	446	oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
087b9fdf	447	output.or.oline.opt: ;\|oline;;\|output;;;
5b7f88c7	448	output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
5a08f1ce	449	%%
206fe6a5	450	/* Exercise M4 quoting: '@:>@@:>@', @<:@, 2. */
5a08f1ce AD	451
5a08f1ce AD	452	static YYSTYPE
051ade83	453	value_as_yystype (value val)
5a08f1ce AD	454	{
	455	YYSTYPE res;
	456	res.ival = val;
	457	return res;
	458	}
	459
	460	static int
	461	yylex (void)
	462	{
cf806753	463	static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
5b7f88c7 PE	464	#output "; /* "
5b7f88c7 PE	465	*/
cf806753 PE	466	static size_t toknum;
	467	if (! (toknum < sizeof input))
	468	abort ();
	469	yylval = value_as_yystype (input[toknum]);
	470	return input[toknum++];
5a08f1ce AD	471	}
	472
	473	static void
	474	yyerror (const char *msg)
	475	{
	476	fprintf (stderr, "%s\n", msg);
	477	}
	478	]])
	479
9501dc6e AD	480	# Pacify Emacs'font-lock-mode: "
9501dc6e AD	481
5a08f1ce	482	AT_DATA([main.c],
051ade83	483	[[typedef int value;
5a08f1ce AD	484	#include "input.h"
	485
	486	int yyparse (void);
	487
	488	int
	489	main (void)
	490	{
	491	return yyparse ();
	492	}
	493	]])
	494
b56471a6	495	AT_CHECK([bison -d -v -o input.c input.y])
efc6bf1b PE	496	AT_COMPILE([input.o], [-c input.c])
	497	AT_COMPILE([main.o], [-c main.c])
	498	AT_COMPILE([input], [input.o main.o])
1154cced	499	AT_PARSER_CHECK([./input], 0,
206fe6a5	500	[[[@<:@],
5a08f1ce AD	501	]])
	502
	503	AT_CLEANUP
e59adf8f PE	504
	505
	506	## ---------------------- ##
	507	## Typed symbol aliases. ##
	508	## ---------------------- ##
	509
	510	AT_SETUP([Typed symbol aliases])
	511
	512	# Bison 2.0 broke typed symbol aliases - ensure they work.
	513
	514	AT_DATA_GRAMMAR([input.y],
	515	[[%union
	516	{
	517	int val;
	518	};
	519	%token <val> MY_TOKEN "MY TOKEN"
	520	%type <val> exp
	521	%%
	522	exp: "MY TOKEN";
	523	%%
	524	]])
	525
	526	AT_CHECK([bison -o input.c input.y])
	527
	528	AT_CLEANUP
b50d2359 AD	529
	530
	531	## --------- ##
	532	## Require. ##
	533	## --------- ##
	534
	535	m4_define([AT_CHECK_REQUIRE],
	536	[AT_SETUP([Require $1])
	537	AT_DATA_GRAMMAR([input.y],
	538	[[%require "$1";
	539	%%
	540	empty_file:;
	541	]])
	542	AT_CHECK([bison -o input.c input.y], $2, [], ignore)
	543	AT_CLEANUP
	544	])
	545
	546	AT_CHECK_REQUIRE(1.0, 0)
	547	AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
	548	## FIXME: Some day augment this version number.
9b8a5ce0	549	AT_CHECK_REQUIRE(100.0, 63)
1f6b3679 JD	550
	551
	552	## ------------------------------------- ##
	553	## String aliases for character tokens. ##
	554	## ------------------------------------- ##
	555
	556	AT_SETUP([String aliases for character tokens])
	557
	558	# Bison once thought a character token and its alias were different symbols
	559	# with the same user token number.
	560
	561	AT_DATA_GRAMMAR([input.y],
	562	[[%token 'a' "a"
	563	%%
	564	start: 'a';
	565	%%
	566	]])
	567
	568	AT_CHECK([bison -o input.c input.y])
	569
	570	AT_CLEANUP
47aee066 JD	571
	572
	573	## --------------------- ##
	574	## Unclosed constructs. ##
	575	## --------------------- ##
	576
	577	AT_SETUP([Unclosed constructs])
	578
	579	# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
	580	# they were prepended to whatever it STRING_GROW'ed next. It also threw them
	581	# away rather than returning them to the parser. The effect was confusing
	582	# subsequent error messages.
	583
	584	AT_DATA([input.y],
	585	[[%token A "a
	586	%token B "b"
	587	%token AB "ab" // Used to complain that "ab" was already used.
	588	%token C '1
	589	%token TWO "2"
	590	%token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
	591
	592	%%
	593
	594	start: ;
	595
	596	// Used to report a syntax error because it didn't see any kind of symbol
	597	// identifier.
	598	%type <f> 'a
	599	;
	600	%type <f> "a
	601	;
	602	// Used to report a syntax error because it didn't see braced code.
	603	%destructor { free ($$)
	604	]])
	605
	606	AT_CHECK([bison -o input.c input.y], 1, [],
	607	[[input.y:1.10-2.0: missing `"' at end of line
	608	input.y:4.10-5.0: missing `'' at end of line
	609	input.y:14.11-15.0: missing `'' at end of line
	610	input.y:16.11-17.0: missing `"' at end of line
	611	input.y:19.13-20.0: missing `}' at end of file
3be03b13	612	input.y:20.1: syntax error, unexpected end of file
47aee066 JD	613	]])
	614
	615	AT_CLEANUP
4d7370cb JD	616
	617
	618	## ------------------------- ##
	619	## %start after first rule. ##
	620	## ------------------------- ##
	621
	622	AT_SETUP([%start after first rule])
	623
	624	# Bison once complained that a %start after the first rule was a redeclaration
	625	# of the start symbol.
	626
	627	AT_DATA([input.y],
	628	[[%%
	629	false_start: ;
	630	start: false_start ;
	631	%start start;
	632	]])
	633
	634	AT_CHECK([bison -o input.c input.y])
	635
	636	AT_CLEANUP