tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2 # Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   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
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17 # 02111-1307, USA.
  18
  19 AT_BANNER([[Input Processing.]])
  20
  21 # Mostly test that we are robust to mistakes.
  22
  23
  24 ## ------------ ##
  25 ## Invalid $n.  ##
  26 ## ------------ ##
  27
  28 AT_SETUP([Invalid $n])
  29
  30 AT_DATA([input.y],
  31 [[%%
  32 exp: { $$ = $1 ; };
  33 ]])
  34
  35 AT_CHECK([bison input.y], [1], [],
  36 [[input.y:2.13-14: integer out of range: `$1'
  37 ]])
  38
  39 AT_CLEANUP
  40
  41
  42 ## ------------ ##
  43 ## Invalid @n.  ##
  44 ## ------------ ##
  45
  46 AT_SETUP([Invalid @n])
  47
  48 AT_DATA([input.y],
  49 [[%%
  50 exp: { @$ = @1 ; };
  51 ]])
  52
  53 AT_CHECK([bison input.y], [1], [],
  54 [[input.y:2.13-14: integer out of range: `@1'
  55 ]])
  56
  57 AT_CLEANUP
  58
  59
  60 ## -------------- ##
  61 ## Type Clashes.  ##
  62 ## -------------- ##
  63
  64 AT_SETUP([Type Clashes])
  65
  66 AT_DATA([input.y],
  67 [[%token foo
  68 %type <bar> exp
  69 %%
  70 exp: foo {} foo
  71    | foo
  72    | /* Empty. */
  73    ;
  74 ]])
  75
  76 AT_CHECK([bison input.y], [], [],
  77 [[input.y:4.6-15: warning: type clash on default action: <bar> != <>
  78 input.y:5.6-8: warning: type clash on default action: <bar> != <>
  79 input.y:6.5: warning: empty rule for typed nonterminal, and no action
  80 ]])
  81
  82 AT_CLEANUP
  83
  84
  85
  86 ## ----------------------- ##
  87 ## Torturing the Scanner.  ##
  88 ## ----------------------- ##
  89
  90 # Be sure to compile and run, so that the C compiler checks what
  91 # we do.
  92
  93 AT_SETUP([Torturing the Scanner])
  94
  95
  96 AT_DATA([input.y], [])
  97 AT_CHECK([bison input.y], [1], [],
  98 [[input.y:1.1: syntax error, unexpected "end of file"
  99 ]])
 100
 101
 102 AT_DATA_GRAMMAR([input.y],
 103 [[%{
 104 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 105 const char *foo = "So %{ and %} can be here too.";
 106
 107 #if 0
 108 /* These examples test Bison while not stressing C compilers too much.
 109    Many C compilers mishandle backslash-newlines, so this part of the
 110    test is inside "#if 0".  The comment and string are written so that
 111    the "#endif" will be seen regardless of the C compiler bugs that we
 112    know about, namely:
 113
 114      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 115      comment.
 116
 117      The Apple Darwin compiler (as of late 2002) mishandles
 118      \\[newline]' within a character constant.
 119
 120    */
 121
 122 /\
 123 * A comment with backslash-newlines in it. %} *\
 124 \
 125 /
 126 /* { Close the above comment, if the C compiler mishandled it.  */
 127
 128 char str[] = "\\
 129 " A string with backslash-newlines in it %{ %} \\
 130 \
 131 "";
 132
 133 char apostrophe = '\'';
 134 #endif
 135
 136 #include <stdio.h>
 137 %}
 138 /* %{ and %} can be here too. */
 139
 140 %{
 141 /* Exercise pre-prologue dependency to %union.  */
 142 typedef int value;
 143 %}
 144
 145 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 146
 147 /* Also exercise %union. */
 148 %union
 149 {
 150   value ival; /* A comment to exercise an old bug. */
 151 };
 152
 153
 154 /* Exercise post-prologue dependency to %union.  */
 155 %{
 156 static YYSTYPE value_as_yystype (value val);
 157
 158 /* Exercise quotes in declarations.  */
 159 char quote[] = "@:>@@:>@,";
 160 %}
 161
 162 %{
 163 static void yyerror (const char *s);
 164 static int yylex (void);
 165 %}
 166
 167 %type <ival> '@<:@'
 168
 169 /* Exercise quotes in strings.  */
 170 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x0\0"
 171
 172 %%
 173 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 174 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 175   {
 176     /* Exercise quotes in braces.  */
 177     char tmp[] = "@<:@%c@:>@,\n";
 178     printf (tmp, $1);
 179   }
 180 ;
 181
 182 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 183 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 184 output.or.oline.opt: ;|oline;;|output;;;
 185 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 186 %%
 187 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 188
 189 static YYSTYPE
 190 value_as_yystype (value val)
 191 {
 192   YYSTYPE res;
 193   res.ival = val;
 194   return res;
 195 }
 196
 197 static int
 198 yylex (void)
 199 {
 200   static const char *input = "@<:@\1\2$@{@oline@__@&t@oline__\
 201 #output "; /* "
 202   */
 203   yylval = value_as_yystype (*input);
 204   return *input++;
 205 }
 206
 207 static void
 208 yyerror (const char *msg)
 209 {
 210   fprintf (stderr, "%s\n", msg);
 211 }
 212 ]])
 213
 214 # Pacify Emacs'font-lock-mode: "
 215
 216 AT_DATA([main.c],
 217 [[typedef int value;
 218 #include "input.h"
 219
 220 int yyparse (void);
 221
 222 int
 223 main (void)
 224 {
 225   return yyparse ();
 226 }
 227 ]])
 228
 229 AT_CHECK([bison -d -v -o input.c input.y])
 230 AT_COMPILE([input.o], [-c input.c])
 231 AT_COMPILE([main.o], [-c main.c])
 232 AT_COMPILE([input], [input.o main.o])
 233 AT_PARSER_CHECK([./input], 0,
 234 [[[@<:@],
 235 ]])
 236
 237 AT_CLEANUP