#
# regen_perly.pl, DAPM 12-Feb-04
#
-# Copyright (c) 2004, 2005 Larry Wall
+# Copyright (c) 2004, 2005, 2006, 2009, 2010, 2011 Larry Wall
#
# Given an input file perly.y, run bison on it and produce
# the following output files:
# it may work elsewhere but no specific attempt has been made to make it
# portable.
+use 5.006;
sub usage { die "usage: $0 [ -b bison_executable ] [ file.y ]\n" }
use warnings;
use strict;
+BEGIN { require 'regen/regen_lib.pl'; }
+
my $bison = 'bison';
if (@ARGV >= 2 and $ARGV[0] eq '-b') {
# this; 1.35+ does
# * Must produce output which is extractable by the regexes below
# * Must produce the right values.
-# These last two contstraints may well be met by earlier versions, but
+# These last two constraints may well be met by earlier versions, but
# I simply haven't tested them yet. If it works for you, then modify
# the test below to allow that version too. DAPM Feb 04.
my $version = `$bison -V`;
-unless ($version =~ /\b(1\.875[a-z]?|2\.[0134])\b/) { die <<EOF; }
+unless ($version) { die <<EOF; }
+Could not find a version of bison in your path. Please install bison.
+EOF
+
+# Don't change this to add new bison versions without testing that the generated
+# files actually work :-) Win32 in particular may not like them. :-(
+unless ($version =~ /\b(1\.875[a-z]?|2\.[0134567])\b/) { die <<EOF; }
You have the wrong version of bison in your path; currently 1.875
-2.0, 2.1, 2.3 or 2.4 is required. Try installing
- http://ftp.gnu.org/gnu/bison/bison-2.4.1.tar.gz
+2.0, 2.1, 2.3, 2.4, 2.5, 2.6 or 2.7 is required. Try installing
+ http://ftp.gnu.org/gnu/bison/bison-2.5.1.tar.gz
or similar. Your bison identifies itself as:
$version
EOF
+# bison's version number, not the entire string, is most useful later on.
+$version = $1;
+
# creates $tmpc_file and $tmph_file
my_system("$bison -d -o $tmpc_file $y_file");
-open CTMPFILE, $tmpc_file or die "Can't open $tmpc_file: $!\n";
+open my $ctmp_fh, '<', $tmpc_file or die "Can't open $tmpc_file: $!\n";
my $clines;
-{ local $/; $clines = <CTMPFILE>; }
+{ local $/; $clines = <$ctmp_fh>; }
die "failed to read $tmpc_file: length mismatch\n"
unless length $clines == -s $tmpc_file;
-close CTMPFILE;
+close $ctmp_fh;
my ($actlines, $tablines) = extract($clines);
+our %tokens;
$tablines .= make_type_tab($y_file, $tablines);
-chmod 0644, $act_file;
-open ACTFILE, ">$act_file" or die "can't open $act_file: $!\n";
-print ACTFILE $actlines;
-close ACTFILE;
-chmod 0444, $act_file;
+my ($act_fh, $tab_fh, $h_fh) = map {
+ open_new($_, '>', { by => $0, from => $y_file });
+} $act_file, $tab_file, $h_file;
+
+print $act_fh $actlines;
-chmod 0644, $tab_file;
-open TABFILE, ">$tab_file" or die "can't open $tab_file: $!\n";
-print TABFILE $tablines;
-close TABFILE;
-chmod 0444, $tab_file;
+print $tab_fh $tablines;
unlink $tmpc_file;
# C<#line 30 "perly.y"> confuses the Win32 resource compiler and the
# C<#line 188 "perlytmp.h"> gets picked up by make depend, so remove them.
-open TMPH_FILE, $tmph_file or die "Can't open $tmph_file: $!\n";
-chmod 0644, $h_file;
-open H_FILE, ">$h_file" or die "Can't open $h_file: $!\n";
+open my $tmph_fh, '<', $tmph_file or die "Can't open $tmph_file: $!\n";
+
my $endcore_done = 0;
-# Token macros need to be generated manually on bison 2.4
-my $gather_tokens = ($version =~ /\b2\.4\b/ ? undef : 0);
+# Token macros need to be generated manually from bison 2.4 on
+my $gather_tokens = $version >= 2.4 ? undef : 0;
my $tokens;
-while (<TMPH_FILE>) {
- print H_FILE "#ifdef PERL_CORE\n" if $. == 1;
+while (<$tmph_fh>) {
+ # bison 2.6 adds header guards, which break things because of where we
+ # insert #ifdef PERL_CORE, so strip them because they aren't important
+ next if /YY_PERLYTMP_H/;
+
+ print $h_fh "#ifdef PERL_CORE\n" if $. == 1;
if (!$endcore_done and /YYSTYPE_IS_DECLARED/) {
- print H_FILE "#endif /* PERL_CORE */\n";
+ print $h_fh <<h;
+#ifdef PERL_IN_TOKE_C
+static bool
+S_is_opval_token(int type) {
+ switch (type) {
+h
+ print $h_fh <<i for sort grep $tokens{$_} eq 'opval', keys %tokens;
+ case $_:
+i
+ print $h_fh <<j;
+ return 1;
+ }
+ return 0;
+}
+#endif /* PERL_IN_TOKE_C */
+#endif /* PERL_CORE */
+j
$endcore_done = 1;
}
next if /^#line \d+ ".*"/;
$tokens .= "#define $tok $val\n" if $tok;
}
}
- print H_FILE $_;
+ print $h_fh $_;
}
-close TMPH_FILE;
-close H_FILE;
-chmod 0444, $h_file;
+close $tmph_fh;
unlink $tmph_file;
-print "rebuilt: $h_file $tab_file $act_file\n";
+foreach ($act_fh, $tab_fh, $h_fh) {
+ read_only_bottom_close_and_rename($_, ['regen_perly.pl', $y_file]);
+}
exit 0;
sub make_type_tab {
my ($y_file, $tablines) = @_;
+ my %just_tokens;
my %tokens;
my %types;
my $default_token;
}
next unless /^%(token|type)/;
- s/^%(token|type)\s+<(\w+)>\s+//
+ s/^%((token)|type)\s+<(\w+)>\s+//
or die "$y_file: unparseable token/type line: $_";
- $tokens{$_} = $2 for (split ' ', $_);
- $types{$2} = 1;
+ for (split ' ', $_) {
+ $tokens{$_} = $3;
+ if ($2) {
+ $just_tokens{$_} = $3;
+ }
+ }
+ $types{$3} = 1;
}
+ *tokens = \%just_tokens; # perly.h needs this
die "$y_file: no __DEFAULT__ token defined\n" unless $default_token;
$types{$default_token} = 1;
$tablines =~ /^\Qstatic const char *const yytname[] =\E\n
- {\n
+ \{\n
(.*?)
^};
/xsm
{ "toketype_" .
(defined $tokens{$1} ? $tokens{$1} : $default_token)
}ge;
- $fields =~ s/, \s* 0 \s* $//x
+ $fields =~ s/, \s* (?:0|YY_NULL) \s* $//x
or die "make_type_tab: couldn't delete trailing ',0'\n";
return
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