+AT_SETUP([Type Clashes])
+
+AT_DATA([input.y],
+[[%union { int bar; }
+%token foo
+%type <bar> exp
+%%
+exp: foo { $$; } foo { $2; } foo
+ | foo
+ | /* Empty. */
+ ;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:5.12-13: error: $$ for the midrule at $2 of 'exp' has no declared type
+input.y:5.24-25: error: $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, 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_BISON_CHECK(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:13.14-20: warning: unset value: $$
+input.y:13.26-41: warning: unset value: $$
+]]])[[input.y:13.10-62: warning: unset value: $]$[
+input.y:13.10-62: warning: unused value: $]3[
+input.y:13.10-62: warning: unused value: $]5[
+]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
+]]])[[input.y:14.10-49: warning: unset value: $]$[
+input.y:14.10-49: warning: unused value: $]3[
+input.y:14.10-49: warning: unused value: $]5[
+input.y:15.10-37: warning: unset value: $]$[
+input.y:15.10-37: warning: unused value: $]3[
+input.y:15.10-37: 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 ($$); } <*> <*>
+%printer { print ($$); } <*> <*>
+
+%destructor { destroy ($$); } <*>
+%printer { print ($$); } <*>
+
+%destructor { destroy ($$); } <> <>
+%printer { print ($$); } <> <>
+
+%destructor { destroy ($$); } <>
+%printer { print ($$); } <>
+
+%%
+
+start: ;
+
+%destructor { destroy ($$); } <*>;
+%printer { print ($$); } <*>;
+
+%destructor { destroy ($$); } <>;
+%printer { print ($$); } <>;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.13-29: error: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:2.10-24: error: redeclaration for default tagged %printer
+input.y:2.10-24: previous declaration
+input.y:4.13-29: error: redeclaration for default tagged %destructor
+input.y:1.13-29: previous declaration
+input.y:5.10-24: error: redeclaration for default tagged %printer
+input.y:2.10-24: previous declaration
+input.y:7.13-29: error: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:8.10-24: error: redeclaration for default tagless %printer
+input.y:8.10-24: previous declaration
+input.y:10.13-29: error: redeclaration for default tagless %destructor
+input.y:7.13-29: previous declaration
+input.y:11.10-24: error: redeclaration for default tagless %printer
+input.y:8.10-24: previous declaration
+input.y:17.13-29: error: redeclaration for default tagged %destructor
+input.y:4.13-29: previous declaration
+input.y:18.10-24: error: redeclaration for default tagged %printer
+input.y:5.10-24: previous declaration
+input.y:20.13-29: error: redeclaration for default tagless %destructor
+input.y:10.13-29: previous declaration
+input.y:21.10-24: error: redeclaration for default tagless %printer
+input.y:11.10-24: previous declaration
+]])
+
+AT_CLEANUP
+
+
+## ---------------------------------------------- ##
+## Per-type %printer and %destructor redeclared. ##
+## ---------------------------------------------- ##
+
+AT_SETUP([Per-type %printer and %destructor redeclared])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <field1> <field2>
+%printer { print ($$); } <field1> <field2>
+
+%destructor { destroy ($$); } <field1> <field1>
+%printer { print ($$); } <field2> <field2>
+
+%%
+
+start: ;
+
+%destructor { destroy ($$); } <field2> <field1>;
+%printer { print ($$); } <field2> <field1>;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:4.13-29: error: %destructor redeclaration for <field1>
+input.y:1.13-29: previous declaration
+input.y:4.13-29: error: %destructor redeclaration for <field1>
+input.y:4.13-29: previous declaration
+input.y:5.10-24: error: %printer redeclaration for <field2>
+input.y:2.10-24: previous declaration
+input.y:5.10-24: error: %printer redeclaration for <field2>
+input.y:5.10-24: previous declaration
+input.y:11.13-29: error: %destructor redeclaration for <field1>
+input.y:4.13-29: previous declaration
+input.y:11.13-29: error: %destructor redeclaration for <field2>
+input.y:1.13-29: previous declaration
+input.y:12.10-24: error: %printer redeclaration for <field1>
+input.y:2.10-24: previous declaration
+input.y:12.10-24: error: %printer redeclaration for <field2>
+input.y:5.10-24: previous declaration
+]])
+
+AT_CLEANUP
+
+
+## ---------------------------------------- ##
+## Unused values with default %destructor. ##
+## ---------------------------------------- ##
+
+AT_SETUP([Unused values with default %destructor])
+
+AT_DATA([[input.y]],
+[[%destructor { destroy ($$); } <>
+%type <tag> tagged
+
+%%
+
+start: end end tagged tagged { $<tag>1; $3; } ;
+end: { } ;
+tagged: { } ;
+]])
+
+AT_BISON_CHECK([input.y], [0], [],
+[[input.y:6.8-45: warning: unset value: $$
+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_BISON_CHECK([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_BISON_CHECK([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_BISON_CHECK([input.y], [1], [],
+[[input.y:8.7-11: error: %type redeclaration for foo
+input.y:3.7-11: previous declaration
+input.y:10.13-17: error: %destructor redeclaration for foo
+input.y:5.13-17: previous declaration
+input.y:9.10-14: error: %printer redeclaration for foo
+input.y:4.10-14: previous declaration
+input.y:11.1-5: error: %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_BISON_OPTION_PUSHDEFS
+AT_DATA([input.y], [])
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.1: error: syntax error, unexpected end of file
+]])
+
+
+AT_DATA([input.y],
+[{}
+])
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:1.1-2: error: 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>
+#include <assert.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[] = "@:>@@:>@,";
+%}
+
+%{
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+%}
+
+%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, $1);
+ }
+;
+
+two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
+oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
+output.or.oline.opt: ;|oline;;|output;;;
+output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
+%%
+/* Exercise M4 quoting: '@:>@@:>@', @<:@, 2. */
+
+static YYSTYPE
+value_as_yystype (value val)
+{
+ YYSTYPE res;
+ res.ival = val;
+ return res;
+}
+]AT_YYERROR_DEFINE[
+static int
+yylex (void)
+{
+ static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
+#output "; /* "
+ */
+ static size_t toknum;
+ assert (toknum < sizeof input);
+ yylval = value_as_yystype (input[toknum]);
+ return input[toknum++];
+}
+]])
+
+# Pacify Emacs' font-lock-mode: "
+
+AT_DATA([main.c],
+[[typedef int value;
+#include "input.h"
+
+int yyparse (void);
+
+int
+main (void)
+{
+ return yyparse ();
+}
+]])
+AT_BISON_OPTION_POPDEFS
+
+AT_BISON_CHECK([-d -v -o input.c input.y])
+AT_COMPILE([input.o])
+AT_COMPILE([main.o])
+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_BISON_CHECK([-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_BISON_CHECK([-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_BISON_CHECK([-o input.c input.y])
+
+AT_CLEANUP
+
+
+## -------------- ##
+## Symbol names. ##
+## -------------- ##
+
+AT_SETUP([Symbols])
+
+AT_BISON_OPTION_PUSHDEFS
+AT_DATA_GRAMMAR([input.y],
+[[%token WITH-DASH
+%token WITHOUT_DASH "WITHOUT-DASH"
+%token WITH.PERIOD
+%token WITHOUT_PERIOD "WITHOUT.PERIOD"
+%code {
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+}
+%%
+start: with-dash without_dash with.period without_period;
+with-dash: WITH-DASH;
+without_dash: "WITHOUT-DASH";
+with.period: WITH.PERIOD;
+without_period: "WITHOUT.PERIOD";
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE[
+]])
+AT_BISON_OPTION_POPDEFS
+
+# POSIX Yacc accept periods, but not dashes.
+AT_BISON_CHECK([--yacc input.y], [1], [],
+[[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
+input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
+]])
+
+# So warn about them.
+AT_BISON_CHECK([-Wyacc input.y], [], [],
+[[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
+input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
+]])
+
+# Dashes are fine for GNU Bison.
+AT_BISON_CHECK([-o input.c input.y])
+
+# Make sure we don't export silly token identifiers with periods or dashes.
+AT_COMPILE([input.o])
+
+
+# Periods are genuine letters, they can start identifiers.
+# Digits and dashes cannot.
+AT_DATA_GRAMMAR([input.y],
+[[%token .GOOD
+ -GOOD
+ 1NV4L1D
+ -123
+%%
+start: .GOOD GOOD
+]])
+AT_BISON_CHECK([-o input.c input.y], [1], [],
+[[input.y:10.10: error: invalid character: '-'
+input.y:11.10-16: error: invalid identifier: '1NV4L1D'
+input.y:12.10: error: invalid character: '-'
+]])
+
+AT_CLEANUP
+
+
+## ----------------- ##
+## Numbered tokens. ##
+## ----------------- ##
+
+AT_SETUP([Numbered tokens])
+
+AT_DATA_GRAMMAR([redecl.y],
+[[%token DECIMAL_1 11259375
+ HEXADECIMAL_1 0xabcdef
+ HEXADECIMAL_2 0xFEDCBA
+ DECIMAL_2 16702650
+%%
+start: DECIMAL_1 HEXADECIMAL_2;
+]])
+
+AT_BISON_CHECK([redecl.y], [1], [],
+[[redecl.y:10.10-22: error: user token number 11259375 redeclaration for HEXADECIMAL_1
+redecl.y:9.8-16: previous declaration for DECIMAL_1
+redecl.y:12.10-18: error: user token number 16702650 redeclaration for DECIMAL_2
+redecl.y:11.10-22: previous declaration for HEXADECIMAL_2
+]])
+
+AT_DATA_GRAMMAR([too-large.y],
+[[%token TOO_LARGE_DEC 999999999999999999999
+ TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
+%%
+start: TOO_LARGE_DEC TOO_LARGE_HEX
+%%
+]])
+
+AT_BISON_CHECK([too-large.y], [1], [],
+[[too-large.y:9.22-42: error: integer out of range: '999999999999999999999'
+too-large.y:10.24-44: error: integer out of range: '0xFFFFFFFFFFFFFFFFFFF'
+]])
+
+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_BISON_CHECK([-o input.c input.y], 1, [],
+[[input.y:1.10-2.0: error: missing '"' at end of line
+input.y:4.10-5.0: error: missing "'" at end of line
+input.y:14.11-15.0: error: missing "'" at end of line
+input.y:16.11-17.0: error: missing '"' at end of line
+input.y:19.13-20.0: error: missing '}' at end of file
+input.y:20.1: error: 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.
projects / bison.git / blobdiff