34 lines
615 B
Perl
34 lines
615 B
Perl
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#!/usr/local/bin/perl -ws
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# REMOVE COMMENTS FROM C++ CODE
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use strict;
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use Parse::RecDescent;
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use vars qw/ $Grammar /;
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$RD_TRACE=1;
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my $parser = new Parse::RecDescent $Grammar or die "invalid grammar";
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undef $/;
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my $text = @ARGV ? <> : <DATA>;
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print join " ", @{$parser->program($text) or die "malformed C program"};
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BEGIN
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{ $Grammar=<<'EOF';
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program : <skip:qr/(\s+|#.*\n)*/> part(s)
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part : /\S+/
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EOF
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}
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__DATA__
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Now we find # to our inexpressible joy
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That the parser # a cunningly wrought thing
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Skips both whitespace # the usual behaviour
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# though it be configurable
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And comments
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#however many there be
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