X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/0797198341a1753f7f03569f69e9abdd2fd2ed14..de5ab9400a4aaeb9ea63b489118e7dd2b30873f2:/tests/local.at?ds=sidebyside

diff --git a/tests/local.at b/tests/local.at
index 4a9331b4..c796be9c 100644
--- a/tests/local.at
+++ b/tests/local.at
@@ -1,27 +1,42 @@
 # Process this -*- Autotest -*- file with autom4te.
 
 # Macros for the GNU Bison Test suite.
-# Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
+# Foundation, Inc.
 
-# This program is free software; you can redistribute it and/or modify
+# 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.
-
+# the Free Software Foundation, either version 3 of the License, 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.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # We want a recent Autotest.
 m4_version_prereq([2.58])
 
 
+## ------------- ##
+## Basic tests.  ##
+## ------------- ##
+
+# AT_MATCHES_CHECK(FILE, PERL-REGEXP, COUNT)
+# ------------------------------------------
+# Expect COUNT matches of the PERL-REGEXP in FILE.  The file is
+# taken in "slurp" mode, i.e., one can match end-of-lines.
+m4_define([AT_MATCHES_CHECK],
+[AT_CHECK([perl -0777 -ne '
+my $count = 0;
+s{$2}{ ++$count; "" }gem;
+printf "$count\n";' $1], [0], [$3
+])])
+
+
 ## ------------------------------- ##
 ## Macros decoding Bison options.  ##
 ## ------------------------------- ##
@@ -37,69 +52,85 @@ m4_define([AT_BISON_OPTION_PUSHDEFS],
 # --------------------------------------------------
 # 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 $$1.
+# This sucks hard, GNU M4 should really provide M5-like $$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_DEFINES_IF],
+[m4_bmatch([$3], [%defines], [$1], [$2])])
+m4_pushdef([AT_SKEL_CC_IF],
+[m4_bmatch([$3], [%language "[Cc]\+\+"\|%skeleton "[a-z0-9]+\.cc"], [$1], [$2])])
 m4_pushdef([AT_GLR_IF],
-[m4_bmatch([$3], [%glr-parser], [$1], [$2])])
+[m4_bmatch([$3], [%glr-parser\|%skeleton "glr\.], [$1], [$2])])
+m4_pushdef([AT_LALR1_CC_IF],
+[AT_SKEL_CC_IF([AT_GLR_IF([$2], [$1])], [$2])])
+m4_pushdef([AT_GLR_CC_IF],
+[AT_SKEL_CC_IF([AT_GLR_IF([$1], [$2])], [$2])])
 # Using yacc.c?
 m4_pushdef([AT_YACC_IF],
-[m4_bmatch([$3], [%glr-parser\|%skeleton], [$2], [$1])])
+[m4_bmatch([$3], [%language\|%glr-parser\|%skeleton], [$2], [$1])])
+m4_pushdef([AT_LEXPARAM_IF],
+[m4_bmatch([$3], [%lex-param], [$1], [$2])])
 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_bmatch([$3], [%define  *api\.pure\|%pure-parser],
+           [m4_bmatch([$3], [%define  *api\.pure *"false"], [$2], [$1])],
+           [$2])])
 m4_pushdef([AT_PURE_AND_LOC_IF],
-[m4_bmatch([$3], [%locations.*%pure-parser\|%pure-parser.*%locations],
-           [$1], [$2])])
+[m4_bmatch([$3], [%locations], [AT_PURE_IF($@)], [$2])])
 m4_pushdef([AT_GLR_OR_PARAM_IF],
 [m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])
-
+m4_pushdef([AT_NAME_PREFIX],
+[m4_bmatch([$3], [%name-prefix ".*"],
+           [m4_bregexp([$3], [name-prefix "\([^"]*\)"], [\1])],
+           [yy])])
+m4_pushdef([AT_TOKEN_PREFIX],
+[m4_bmatch([$3], [%define api.tokens.prefix ".*"],
+           [m4_bregexp([$3], [%define api.tokens.prefix "\(.*\)"], [\1])])])
 # 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])])
+		    [$2])])
 # yyerror always sees the locations (when activated), except if
-# yacc & pure & !param.
+# (yacc & pure & !param).  FIXME: This is wrong.  See the manual.
 m4_pushdef([AT_YYERROR_SEES_LOC_IF],
 [AT_LOCATION_IF([AT_YACC_IF([AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
-                                        [$1])],
-                            [$1])],
-                [$2])])
+					[$1])],
+			    [$1])],
+		[$2])])
 
-# The interface is pure: either because %pure-parser, or because we
+# The interface is pure: either because %define api.pure, 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_SKEL_CC_IF([$1], [$2])])])
 
 AT_PURE_LEX_IF(
-[m4_pushdef([AT_LOC], [(*yylloc)])
- m4_pushdef([AT_VAL], [(*yylval)])
+[m4_pushdef([AT_LOC], [(*llocp)])
+ m4_pushdef([AT_VAL], [(*lvalp)])
  m4_pushdef([AT_LEX_FORMALS],
-            [YYSTYPE *yylval[]AT_LOCATION_IF([, YYLTYPE *yylloc])])
+	    [YYSTYPE *lvalp[]AT_LOCATION_IF([, YYLTYPE *llocp])])
  m4_pushdef([AT_LEX_ARGS],
-            [yylval[]AT_LOCATION_IF([, yylloc])])
+	    [lvalp[]AT_LOCATION_IF([, llocp])])
  m4_pushdef([AT_USE_LEX_ARGS],
-            [(void) yylval;AT_LOCATION_IF([(void) yylloc])])
+	    [(void) lvalp;AT_LOCATION_IF([(void) llocp])])
  m4_pushdef([AT_LEX_PRE_FORMALS],
-            [AT_LEX_FORMALS, ])
+	    [AT_LEX_FORMALS, ])
  m4_pushdef([AT_LEX_PRE_ARGS],
-            [AT_LEX_ARGS, ])
+	    [AT_LEX_ARGS, ])
 ],
-[m4_pushdef([AT_LOC], [(yylloc)])
- m4_pushdef([AT_VAL], [(yylval)])
+[m4_pushdef([AT_LOC], [[(]AT_NAME_PREFIX[lloc)]])
+ m4_pushdef([AT_VAL], [[(]AT_NAME_PREFIX[lval)]])
  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_GLR_IF([AT_KEYWORDS([glr])])
 ])# _AT_BISON_OPTION_PUSHDEFS
 
 
@@ -116,13 +147,18 @@ 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_NAME_PREFIX])
 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_LEXPARAM_IF])
 m4_popdef([AT_YACC_IF])
 m4_popdef([AT_GLR_IF])
+m4_popdef([AT_SKEL_CC_IF])
+m4_popdef([AT_GLR_CC_IF])
 m4_popdef([AT_LALR1_CC_IF])
+m4_popdef([AT_DEFINES_IF])
 ])# AT_BISON_OPTION_POPDEFS
 
 
@@ -131,23 +167,37 @@ m4_popdef([AT_LALR1_CC_IF])
 ## Generating Grammar Files.  ##
 ## -------------------------- ##
 
+# AT_DATA_SOURCE_PROLOGUE
+# ------------------------
+# The prologue that should be included in any source code that is
+# meant to be compiled.
+m4_define([AT_DATA_SOURCE_PROLOGUE],
+[[#include <config.h>
+/* We don't need perfect functions for these tests. */
+#undef malloc
+#undef memcmp
+#undef realloc
+]])
 
 # 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
-%}]
-])
+[[%code top {
+]AT_DATA_SOURCE_PROLOGUE[]dnl
+[}
+]])
 
+# AT_DATA_SOURCE(NAME, CONTENT)
+# -----------------------------
+# Generate the file NAME, which CONTENT is preceded by
+# AT_DATA_SOURCE_PROLOGUE.
+m4_define([AT_DATA_SOURCE],
+[AT_DATA([$1],
+[AT_DATA_SOURCE_PROLOGUE
+$2])
+])
 
 # AT_DATA_GRAMMAR(NAME, CONTENT)
 # ------------------------------
@@ -159,6 +209,79 @@ m4_define([AT_DATA_GRAMMAR],
 $2])
 ])
 
+# AT_BISON_CHECK(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
+# -------------------------------------------------
+# Check Bison by invoking `bison BISON_ARGS'.  OTHER_AT_CHECK_ARGS are the
+# usual remaining arguments to AT_CHECK: STATUS, STDOUT, etc.
+#
+# This macro or AT_BISON_CHECK_NO_XML should always be used whenever invoking
+# Bison in the test suite.  For now it ensures that:
+#
+#   1. Valgrind doesn't report reachable memory when Bison is expected to have
+#      a non-zero exit status since Bison doesn't always try to free all memory
+#      in that case.
+#
+#   2. In the case of maintainer-xml-check, XML/XSLT output is compared with
+#      --graph and --report=all output for every working grammar.
+m4_define([AT_BISON_CHECK],
+[m4_if(m4_quote($2), [0], [AT_BISON_CHECK_XML($@)],
+       m4_quote($2), [], [AT_BISON_CHECK_XML($@)])
+AT_BISON_CHECK_NO_XML($@)])
+
+# AT_BISON_CHECK_NO_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
+# --------------------------------------------------------
+# Same as AT_BISON_CHECK except don't perform XML/XSLT checks.  This is useful
+# when a tortured grammar's XML is known to be too large for xsltproc to
+# handle.
+m4_define([AT_BISON_CHECK_NO_XML],
+[AT_CHECK(m4_if(m4_quote($2), [0], [], m4_quote($2), [], [],
+                [AT_QUELL_VALGRIND ])[[bison ]]$@)])
+
+# AT_BISON_CHECK_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
+# -----------------------------------------------------
+# Run AT_BISON_CHECK's XML/XSLT checks if $BISON_TEST_XML=1 and $XSLTPROC is
+# defined.  It doesn't make sense to invoke this macro if Bison is expected to
+# have a non-zero exit status.
+m4_define([AT_BISON_CHECK_XML],
+[[if test x"$BISON_TEST_XML" = x1 && test x"$XSLTPROC" != x""; then
+  mkdir xml-tests]
+  m4_pushdef([AT_BISON_ARGS],
+             [m4_bpatsubsts([[$1]],
+                            [--report(-file)?=[^][ ]*], [],
+                            [--graph=[^][ ]*], [],
+                            [--xml=[^][ ]*], [])])dnl
+  # Don't combine these Bison invocations since we want to be sure that
+  # --report=all isn't required to get the full XML file.
+  AT_CHECK([[bison --report=all --report-file=xml-tests/test.output \
+             --graph=xml-tests/test.dot ]]AT_BISON_ARGS,
+           [[0]], [ignore], [ignore])
+  AT_CHECK([[bison --xml=xml-tests/test.xml ]]AT_BISON_ARGS,
+           [[0]], [ignore], [ignore])
+  m4_popdef([AT_BISON_ARGS])dnl
+  [cp xml-tests/test.output expout]
+  AT_CHECK([[$XSLTPROC \
+             `]]AT_QUELL_VALGRIND[[ bison --print-datadir`/xslt/xml2text.xsl \
+             xml-tests/test.xml]], [[0]], [expout])
+  [cp xml-tests/test.dot expout]
+  AT_CHECK([[$XSLTPROC \
+             `]]AT_QUELL_VALGRIND[[ bison --print-datadir`/xslt/xml2dot.xsl \
+             xml-tests/test.xml]], [[0]], [expout])
+  [rm -rf xml-tests expout
+fi]])
+
+# AT_QUELL_VALGRIND
+# -----------------
+# Put this before a Bison invocation to keep Valgrind from complaining about
+# reachable memory.
+#
+# Do not quote invocations of this macro within the first argument of AT_CHECK.
+# The triple quoting below will cause test cases to fail if you do.  If you do
+# so anyway but also decrease the quoting below to avoid that problem, AT_CHECK
+# will then fail to shell-escape its contents when attempting to print them.
+# The testsuite verbose output, at least, will be incorrect, but nothing may
+# fail to make sure you notice.
+m4_define([AT_QUELL_VALGRIND],
+[[[VALGRIND_OPTS="$VALGRIND_OPTS --leak-check=summary --show-reachable=no"; export VALGRIND_OPTS;]]])
 
 ## ------------------------ ##
 ## Compiling C, C++ Files.  ##
@@ -170,30 +293,205 @@ $2])
 # Compile SOURCES into OUTPUT.  If OUTPUT does not contain '.',
 # assume that we are linking too; this is a hack.
 m4_define([AT_COMPILE],
-[AT_CHECK([$CC $CFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])m4_default([$2], [$1.c]) m4_bmatch([$1], [[.]], [], [$LIBS ])-o $1],
+[AT_CHECK([$CC $CFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])-o $1 m4_default([$2], [$1.c])[]m4_bmatch([$1], [[.]], [], [ $LIBS])],
 	   0, [ignore], [ignore])])
 
 # AT_COMPILE_CXX(OUTPUT, [SOURCES = OUTPUT.cc])
 # --------------------------------------------
+# Compile SOURCES into OUTPUT.  If OUTPUT does not contain '.',
+# assume that we are linking too; this is a hack.
 # 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 $1],
-         0, [ignore], [ignore])])
-
+AT_CHECK([$CXX $CXXFLAGS $CPPFLAGS m4_bmatch([$1], [[.]], [], [$LDFLAGS ])-o $1 m4_default([$2], [$1.cc])[]m4_bmatch([$1], [[.]], [], [ $LIBS])],
+	 0, [ignore], [ignore])])
+
+
+# AT_FULL_COMPILE(OUTPUT, [OTHER])
+# --------------------------------
+# Compile OUTPUT.y to OUTPUT.c or OUTPUT.cc, and compile it to OUTPUT.
+# If OTHER is specified, compile OUTPUT-OTHER.c or OUTPUT-OTHER.cc to OUTPUT
+# along with it.
+# Relies on AT_SKEL_CC_IF.
+m4_define([AT_FULL_COMPILE],
+[AT_SKEL_CC_IF(
+  [AT_BISON_CHECK([-o $1.cc $1.y])
+   AT_COMPILE_CXX([$1]m4_ifval($2, [, [$1.cc $1-$2.cc]]))],
+  [AT_BISON_CHECK([-o $1.c $1.y])
+   AT_COMPILE([$1]m4_ifval($2, [, [$1.c $1-$2.c]]))])
+])
 
 
 ## ---------------------------- ##
 ## Running a generated parser.  ##
 ## ---------------------------- ##
 
-# AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR)
-# -----------------------------------------------------
+# AT_PARSER_CHECK(COMMAND, EXIT-STATUS, EXPOUT, EXPERR, [PRE])
+# ------------------------------------------------------------
 # So that we can run `./testsuite PREPARSER='valgrind -q' for instance.
 m4_define([AT_PARSER_CHECK],
-[AT_CHECK([$PREPARSER $1], [$2], [$3], [$4])])
-
+[AT_CHECK([$5 $PREPARSER $1], [$2], [$3], [$4])])
+
+# AT_TEST_TABLES_AND_PARSE(TITLE, COND-VALUE, TEST-SPEC,
+#                          DECLS, GRAMMAR, INPUT,
+#                          BISON-STDERR, TABLES-OR-LAST-STATE,
+#                          [OTHER-CHECKS],
+#                          [PARSER-EXIT-VALUE],
+#                          [PARSER-STDOUT], [PARSER-STDERR])
+# -------------------------------------------------------------
+# Using TITLE as the test group title, check the generated parser tables
+# and parser for a specified grammar file under a condition labeled by
+# COND-VALUE.
+#
+# TEST-SPEC is a comma-delimited list of attributes of this test.  Each
+# recognized attribute is described below where it is relevant.
+#
+# Insert DECLS and GRAMMAR into the declarations and grammar section of
+# the grammar file.  Insert basic yyerror, yylex, and main function
+# definitions as well.  Hardcode yylex to return the (possibly empty)
+# comma-delimited series of tokens in INPUT followed by token 0.
+#
+# If TEST-SPEC contains the attribute no-xml, then invoke bison using
+# AT_BISON_CHECK_NO_XML.  Otherwise, invoke bison using AT_BISON_CHECK.
+# On the bison command-line, specify `--report=all --defines'.  Check
+# that Bison exits with value 0, has no stdout, and has stderr
+# BISON-STDERR.
+#
+# If TEST-SPEC contains the attribute `last-state', check that the value
+# of TABLES-OR-LAST-STATE is the index of the last state generated for
+# the grammar; in other words, check the number of states (minus one).
+# Otherwise, check that everything in the `.output' file starting with
+# the definition of state 0 is the same as the entire value of
+# TABLES-OR-LAST-STATE.
+#
+# Expand the M4 in OTHER-CHECKS to perform additional checks of the
+# `.output' file, which is named `input.output', and/or grammar file,
+# which is named `input.y'.
+#
+# Finally, compile the generated parser and then run it using
+# AT_PARSER_CHECK with PARSER-EXIT-VALUE, PARSER-STDOUT, and
+# PARSER-STDERR as the 2nd-4th arguments.
+#
+# As a precondition, you must properly double-quote all arguments that
+# are to be interpreted as strings.
+#
+# AT_COND_CASE (when appearing in single-quoted segments of arguments)
+# invokes m4_case with its own arguments but COND-VALUE inserted as the
+# first argument.  This is useful, for example, when wrapping multiple
+# AT_TEST_TABLES_AND_PARSE invocations, each representing a different
+# condition, in another macro.
+#
+# For example:
+#
+#   # AT_TEST_SYNTAX_ERROR(DESCRIPTION, DECLS, GRAMMAR, INPUT, LAST-STATE,
+#   #                      PARSER-EXIT-VALUE, PARSER-STDOUT, PARSER-STDERR)
+#   # ---------------------------------------------------------------------
+#   m4_define([AT_TEST_SYNTAX_ERROR],
+#   [
+#     AT_TEST_TABLES_AND_PARSE([$1[ with %error-verbose]], [[verbose]],
+#                              [[last-state]],
+#                              [[%error-verbose ]$2], [$3], [$4],
+#                              [[]], [$5], [], [$6], [$7], [$8])
+#     AT_TEST_TABLES_AND_PARSE([$1[ with no %error-verbose]], [[no verbose]],
+#                              [[last-state]],
+#                              [$2], [$3], [$4],
+#                              [[]], [$5], [], [$6], [$7], [$8])
+#   ])
+#
+#   AT_TEST_SYNTAX_ERROR([[Single Char Grammar]],
+#                        [[%token 'b']], [[start: 'a' ;]], [['a', 'b']],
+#                        [[3]],
+#                        [[1]], [[]],
+#                        [AT_COND_CASE([[no verbose]],
+#                                      [[syntax error
+#   ]],
+#                                      [[syntax error, unexpected 'b', expecting $end
+#   ]])])
+m4_define([AT_TEST_TABLES_AND_PARSE],
+[_AT_TEST_TABLES_AND_PARSE($[1], $[@], $@)])
+
+m4_define([_AT_TEST_TABLES_AND_PARSE],
+[m4_pushdef([AT_COND_CASE], [m4_case([$4], $][@)])
+
+AT_SETUP([$3])
+
+AT_DATA_GRAMMAR([[input.y]],
+[[%code {
+  #include <stdio.h>
+  static void yyerror (char const *msg);
+  static int yylex (void);
+}
+
+]$6[
+
+%%
+
+]$7[
+
+%%
+
+static void
+yyerror (char const *msg)
+{
+  fprintf (stderr, "%s\n", msg);
+}
+
+static int
+yylex (void)
+{
+  static int const input[] = {
+    ]m4_if([$8], [], [], [$8], [[]], [], [$8[, ]])[0
+  };
+  static int const *inputp = input;
+  return *inputp++;
+}
+
+int
+main (void)
+{
+  return yyparse ();
+}
+]])
+
+# AT_CHECK invokes AS_ESCAPE before expanding macros, so it corrupts some
+# special characters in the macros.  To avoid this, expand now and pass it
+# the result with proper string quotation.  Assume args 9 thru 14 expand to
+# properly quoted strings.
+
+# Pass plenty of options, to exercise plenty of code, even if we
+# don't actually check the output.  But SEGV is watching us, and
+# so might do dmalloc.
+m4_if(m4_index(m4_quote($5), [no-xml]), -1,
+      [AT_BISON_CHECK],
+      [AT_BISON_CHECK_NO_XML])([[--report=all --defines -o input.c input.y]],
+                               [0], [], m4_dquote($9))
+
+# Sigh.  Some M4's can't reference arg 10 directly.
+m4_pushdef([arg10], m4_car(m4_shiftn(9, $@)))
+m4_if(m4_index(m4_quote($5), [last-state]), -1,
+      [AT_CHECK([[sed -n '/^state 0$/,$p' input.output]], [[0]],
+                m4_dquote(arg10))],
+      [AT_CHECK([[sed -n 's/^state //p' input.output | tail -1]], [[0]],
+                m4_dquote(arg10)[[
+]])])
+m4_popdef([arg10])
+
+m4_if($#, 10, [], m4_car(m4_shiftn(10, $@)))
+
+AT_COMPILE([[input]])
+
+m4_pushdef([AT_EXPAND_ARGS], [$][*])
+m4_pushdef([AT_DQUOTE_EACH], [[[$1]]m4_if($][#, 1, [], [, AT_DQUOTE_EACH(m4_shift($2))])])
+
+AT_PARSER_CHECK([[./input]]m4_if($#, 10, [], $#, 11, [], [, AT_DQUOTE_EACH(AT_EXPAND_ARGS(m4_shiftn(11, $@)))]))
+
+m4_popdef([AT_DQUOTE_EACH])
+m4_popdef([AT_EXPAND_ARGS])
+
+AT_CLEANUP
+
+m4_popdef([AT_COND_CASE])])