local.at

bison 2.0 主要可以用来做语法分析用的

# Process this -*- Autotest -*- file with autom4te.

# Macros for the GNU Bison Test suite.
# Copyright (C) 2003, 2004 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., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

# We want a recent Autotest.
m4_version_prereq([2.58])


## ------------------------------- ##
## Macros decoding Bison options.  ##
## ------------------------------- ##


# AT_BISON_OPTION_PUSHDEFS([BISON-OPTIONS])
# -----------------------------------------
m4_define([AT_BISON_OPTION_PUSHDEFS],
[_AT_BISON_OPTION_PUSHDEFS($[1], $[2], [$1])])


# _AT_BISON_OPTION_PUSHDEFS($1, $2, [BISON-OPTIONS])
# --------------------------------------------------
# This macro works around the impossibility to define macros
# inside macros, because issuing `[$1]' is not possible in M4 :(.
# This sucks hard, GNU M4 should really provide M5 like $$1.
m4_define([_AT_BISON_OPTION_PUSHDEFS],
[m4_if([$1$2], $[1]$[2], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl
m4_pushdef([AT_LALR1_CC_IF],
[m4_bmatch([$3], ["lalr1.cc"], [$1], [$2])])
m4_pushdef([AT_GLR_IF],
[m4_bmatch([$3], [%glr-parser], [$1], [$2])])
# Using yacc.c?
m4_pushdef([AT_YACC_IF],
[m4_bmatch([$3], [%glr-parser\|%skeleton], [$2], [$1])])
m4_pushdef([AT_PARAM_IF],
[m4_bmatch([$3], [%parse-param], [$1], [$2])])
m4_pushdef([AT_LOCATION_IF],
[m4_bmatch([$3], [%locations], [$1], [$2])])
m4_pushdef([AT_PURE_IF],
[m4_bmatch([$3], [%pure-parser], [$1], [$2])])
m4_pushdef([AT_PURE_AND_LOC_IF],
[m4_bmatch([$3], [%locations.*%pure-parser\|%pure-parser.*%locations],
           [$1], [$2])])
m4_pushdef([AT_GLR_OR_PARAM_IF],
[m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])

# yyerror receives the location if %location & %pure & (%glr or %parse-param).
m4_pushdef([AT_YYERROR_ARG_LOC_IF],
[AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],
                    [$2])])
# yyerror always sees the locations (when activated), except if
# yacc & pure & !param.
m4_pushdef([AT_YYERROR_SEES_LOC_IF],
[AT_LOCATION_IF([AT_YACC_IF([AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
                                        [$1])],
                            [$1])],
                [$2])])

# The interface is pure: either because %pure-parser, or because we
# are using the C++ parsers.
m4_pushdef([AT_PURE_LEX_IF],
[AT_PURE_IF([$1],
            [AT_LALR1_CC_IF([$1], [$2])])])

AT_PURE_LEX_IF(
[m4_pushdef([AT_LOC], [(*yylloc)])
 m4_pushdef([AT_VAL], [(*yylval)])
 m4_pushdef([AT_LEX_FORMALS],
            [YYSTYPE *yylval[]AT_LOCATION_IF([, YYLTYPE *yylloc])])
 m4_pushdef([AT_LEX_ARGS],
            [yylval[]AT_LOCATION_IF([, yylloc])])
 m4_pushdef([AT_USE_LEX_ARGS],
            [(void) yylval;AT_LOCATION_IF([(void) yylloc])])
 m4_pushdef([AT_LEX_PRE_FORMALS],
            [AT_LEX_FORMALS, ])
 m4_pushdef([AT_LEX_PRE_ARGS],
            [AT_LEX_ARGS, ])
],
[m4_pushdef([AT_LOC], [(yylloc)])
 m4_pushdef([AT_VAL], [(yylval)])
 m4_pushdef([AT_LEX_FORMALS],     [void])
 m4_pushdef([AT_LEX_ARGS],        [])
 m4_pushdef([AT_USE_LEX_ARGS],    [])
 m4_pushdef([AT_LEX_PRE_FORMALS], [])
 m4_pushdef([AT_LEX_PRE_ARGS],    [])
])
])# _AT_BISON_OPTION_PUSHDEFS


# AT_BISON_OPTION_POPDEFS
# -----------------------
m4_define([AT_BISON_OPTION_POPDEFS],
[m4_popdef([AT_LEX_PRE_ARGS])
m4_popdef([AT_LEX_PRE_FORMALS])
m4_popdef([AT_USE_LEX_ARGS])
m4_popdef([AT_LEX_ARGS])
m4_popdef([AT_LEX_FORMALS])
m4_popdef([AT_VAL])
m4_popdef([AT_LOC])
m4_popdef([AT_PURE_LEX_IF])
m4_popdef([AT_YYERROR_SEES_LOC_IF])
m4_popdef([AT_YYERROR_ARG_LOC_IF])
m4_popdef([AT_GLR_OR_PARAM_IF])
m4_popdef([AT_PURE_AND_LOC_IF])
m4_popdef([AT_LOCATION_IF])
m4_popdef([AT_PARAM_IF])
m4_popdef([AT_YACC_IF])
m4_popdef([AT_GLR_IF])
m4_popdef([AT_LALR1_CC_IF])
])# AT_BISON_OPTION_POPDEFS



## -------------------------- ##
## Generating Grammar Files.  ##
## -------------------------- ##


# AT_DATA_GRAMMAR_PROLOGUE
# ------------------------
# The prologue that should be included in any grammar which parser is
# meant to be compiled.
m4_define([AT_DATA_GRAMMAR_PROLOGUE],
[[%{
#if HAVE_CONFIG_H
# include <config.h>
  /* We don't need perfect functions for these tests. */
# undef malloc
# undef memcmp
# undef realloc
#endif
%}]
])


# AT_DATA_GRAMMAR(NAME, CONTENT)
# ------------------------------
# Generate the file NAME, which CONTENT is preceded by
# AT_DATA_GRAMMAR_PROLOGUE.
m4_define([AT_DATA_GRAMMAR],
[AT_DATA([$1],
[AT_DATA_GRAMMAR_PROLOGUE
$2])
])


## ------------------------ ##
## Compiling C, C++ Files.  ##
## ------------------------ ##


# AT_COMPILE(OUTPUT, [SOURCES = OUTPUT.c])
# ----------------------------------------
# Compile SOURCES into OUTPUT.  If OUTPUT does not contain '.',
# assume that we are linking too; this is a hack.
m4_define([AT_COMPILE],
[AT_CHECK([$CC $CFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])m4_default([$2], [$1.c]) m4_bmatch([$1], [[.]], [], [$LIBS ])-o $1],
	   0, [ignore], [ignore])])

# AT_COMPILE_CXX(OUTPUT, [SOURCES = OUTPUT.cc])
# --------------------------------------------
# If the C++ compiler does not work, ignore the test.
m4_define([AT_COMPILE_CXX],
[AT_KEYWORDS(c++)
AT_CHECK([$BISON_CXX_WORKS], 0, ignore, ignore)
AT_CHECK([$CXX $CXXFLAGS $CPPFLAGS m4_default([$2], [$1.cc]) -o $1],
         0, [ignore], [ignore])])



## ---------------------------- ##
## Running a generated parser.  ##
## ---------------------------- ##

# AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR)
# -----------------------------------------------------
# So that we can run `./testsuite PREPARSER='valgrind -q' for instance.
m4_define([AT_PARSER_CHECK],
[AT_CHECK([$PREPARSER $1], [$2], [$3], [$4])])




## ----------------------- ##
## Launch the test suite.  ##
## ----------------------- ##

AT_INIT

AT_TESTED([bison])