Disable unset/unused mid-rule value warnings by default, and recognize

[bison.git] / tests / input.at

diff --git a/tests/input.at b/tests/input.at
index 99946e9da1e60c57c6c5b4904ae00c40a8f0185f..1239df00193e83588381cc52c36dd3686f2371e0 100644 (file)
--- a/tests/input.at
+++ b/tests/input.at
@@ -1,5 +1,5 @@
 # Checking the Bison scanner.                    -*- Autotest -*-
 # Checking the Bison scanner.                    -*- Autotest -*-

-# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# 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
 
 # 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


@@ -25,58 +25,321 @@ AT_BANNER([[Input Processing.]])
 ## Invalid $n.  ##
 ## ------------ ##
 
 ## Invalid $n.  ##
 ## ------------ ##
 

-AT_SETUP([Invalid dollar-n])
+AT_SETUP([Invalid \$n and @n])

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

+exp: { @$ = @1 ; };

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

-## ------------ ##
-## Invalid @n.  ##
-## ------------ ##
+## -------------- ##
+## Type Clashes.  ##
+## -------------- ##

 
 

-AT_SETUP([Invalid @n])
+AT_SETUP([Type Clashes])

 
 AT_DATA([input.y],
 
 AT_DATA([input.y],

-[[%%
-exp: { @$ = @1 ; };
+[[%union { int bar; }
+%token foo
+%type <bar> exp
+%%
+exp: foo { $$; } foo { $2; } foo
+   | foo
+   | /* Empty. */
+   ;

 ]])
 
 AT_CHECK([bison input.y], [1], [],
 ]])
 
 AT_CHECK([bison input.y], [1], [],

-[[input.y:2.13-14: integer out of range: `@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_CLEANUP
 
 

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

 
 

-AT_SETUP([Type Clashes])
+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, CHECK_MIDRULE_VALUES)
+# ------------------------------------------------------------------
+# 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.  If CHECK_MIDRULE_VALUES
+# is set, then --warnings=midrule-values is
+# set.
+
+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 { $<integer>2 } INT { $<integer>4 };
+d: INT | INT { } INT { $]1[ } INT { $<integer>2 };
+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]m4_ifval($2, [ --warnings=midrule-values ])[ 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
+]]m4_ifval($2, [[[input.y:13.14-19: warning: unset value: $$
+input.y:13.25-39: warning: unset value: $$
+]]])[[input.y:13.10-59: warning: unset value: $]$[
+input.y:13.10-59: warning: unused value: $]3[
+input.y:13.10-59: warning: unused value: $]5[
+]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
+]]])[[input.y:14.10-47: warning: unset value: $]$[
+input.y:14.10-47: warning: unused value: $]3[
+input.y:14.10-47: 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[
+]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
+]]])[[input.y:17.10-58: warning: unused value: $]3[
+]]m4_ifval($2, [[[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[
+]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
+]]])[[input.y:18.10-72: warning: unused value: $]5[
+]]m4_ifval($2, [[[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[
+]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
+]]]))])
+
+
+## --------------- ##
+## Unused values.  ##
+## --------------- ##
+
+AT_SETUP([Unused values])
+AT_CHECK_UNUSED_VALUES
+AT_CHECK_UNUSED_VALUES(, [1])
+AT_CLEANUP
+
+
+## ------------------------------------------ ##
+## Unused values before symbol declarations.  ##
+## ------------------------------------------ ##
+
+AT_SETUP([Unused values before symbol declarations])
+AT_CHECK_UNUSED_VALUES([1])
+AT_CHECK_UNUSED_VALUES([1], [1])
+AT_CLEANUP
+
+
+## --------------------------------------------- ##
+## Default %printer and %destructor redeclared.  ##
+## --------------------------------------------- ##
+
+AT_SETUP([Default %printer and %destructor redeclared])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <*> <*>
+%printer { destroy ($$); } <*> <*>
+
+%destructor { destroy ($$); } <*>
+%printer { destroy ($$); } <*>
+
+%destructor { destroy ($$); } <!> <!>
+%printer { destroy ($$); } <!> <!>
+
+%destructor { destroy ($$); } <!>
+%printer { destroy ($$); } <!>

 
 

-AT_DATA([input.y],
-[[%token foo
-%type <bar> exp

 %%
 %%

-exp: foo {} foo
-   | foo
-   | /* Empty. */
-   ;
+
+start: ;
+
+%destructor { destroy ($$); } <*>;
+%printer { destroy ($$); } <*>;
+
+%destructor { destroy ($$); } <!>;
+%printer { destroy ($$); } <!>;
+]])
+
+AT_CHECK([bison input.y], [1], [],
+[[input.y:1.13-29: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:2.10-26: redeclaration for default tagged %printer
+input.y:2.10-26: previous declaration
+input.y:4.13-29: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:5.10-26: redeclaration for default tagged %printer
+input.y:2.10-26: previous declaration
+input.y:7.13-29: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:8.10-26: redeclaration for default tagless %printer
+input.y:8.10-26: previous declaration
+input.y:10.13-29: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:11.10-26: redeclaration for default tagless %printer
+input.y:8.10-26: previous declaration
+input.y:17.13-29: redeclaration for default tagged %destructor
+input.y:4.13-29: previous declaration
+input.y:18.10-26: redeclaration for default tagged %printer
+input.y:5.10-26: previous declaration
+input.y:20.13-29: redeclaration for default tagless %destructor
+input.y:10.13-29: previous declaration
+input.y:21.10-26: redeclaration for default tagless %printer
+input.y:11.10-26: 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 ($$); } <!>
+%type <tag> tagged
+
+%%
+
+start: end end tagged tagged { $<tag>1; $3; } ;
+end: { } ;
+tagged: { } ;
+]])
+
+AT_CHECK([bison input.y], [0], [],
+[[input.y:6.8-45: warning: unset value: $$
+input.y:6.8-45: warning: unused value: $2
+input.y:7.6-8: warning: unset value: $$
+]])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <*>
+%type <tag> tagged
+
+%%
+
+start: end end tagged tagged { $<tag>1; $3; } ;
+end: { } ;
+tagged: { } ;

 ]])
 
 ]])
 

-AT_CHECK([bison input.y], [], [],
-[[input.y:4.6-15: warning: type clash on default action: <bar> != <>
-input.y:5.6-8: warning: type clash on default action: <bar> != <>
-input.y:6.5: warning: empty rule for typed nonterminal, and no action
+AT_CHECK([bison input.y], [0], [],
+[[input.y:6.8-45: warning: unused value: $4
+input.y:8.9-11: 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
 ]])
 
 AT_CLEANUP


@@ -107,13 +370,13 @@ exp: foo;
 
 AT_CHECK([bison input.y], [1], [],
 [[input.y:8.7-11: %type redeclaration for foo
 
 AT_CHECK([bison input.y], [1], [],
 [[input.y:8.7-11: %type redeclaration for foo

-input.y:3.7-11: first declaration
+input.y:3.7-11: previous declaration

 input.y:10.13-17: %destructor redeclaration for foo
 input.y:10.13-17: %destructor redeclaration for foo

-input.y:5.13-17: first declaration
-input.y:9.19-23: %printer redeclaration for foo
-input.y:10.13-17: first declaration
+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:11.1-5: %left redeclaration for foo

-input.y:6.1-5: first declaration
+input.y:6.1-5: previous declaration

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP


@@ -136,6 +399,14 @@ AT_CHECK([bison input.y], [1], [],
 ]])
 
 
 ]])
 
 

+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. */
 AT_DATA_GRAMMAR([input.y],
 [[%{
 /* This is seen in GCC: a %{ and %} in middle of a comment. */


@@ -171,6 +442,7 @@ char apostrophe = '\'';
 #endif
 
 #include <stdio.h>
 #endif
 
 #include <stdio.h>

+#include <stdlib.h>

 %}
 /* %{ and %} can be here too. */
 
 %}
 /* %{ and %} can be here too. */
 


@@ -234,11 +506,14 @@ value_as_yystype (value val)
 static int
 yylex (void)
 {
 static int
 yylex (void)
 {

-  static const char *input = "@<:@\1\2$@{@oline@__@&t@oline__\
+  static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\

 #output "; /* "
   */
 #output "; /* "
   */

-  yylval = value_as_yystype (*input);
-  return *input++;
+  static size_t toknum;
+  if (! (toknum < sizeof input))
+    abort ();
+  yylval = value_as_yystype (input[toknum]);
+  return input[toknum++];

 }
 
 static void
 }
 
 static void


@@ -318,3 +593,90 @@ 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)
 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