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PATH: usr / share / doc / perl-Parse-RecDescent-1.967009 / demo

#!/usr/bin/perl -sw

# RECURSIVE #includes DURING A RECURSIVE DESCENT

use Parse::RecDescent;

sub loadfile($)
{
	open FILE, $_[0]  or die "Couldn't find included file: $_[0]\n";
	my $contents = <FILE>;
	close FILE;
	return $contents;
}

%macro = ();

sub demacro($)
{
	my $text = shift;
	while (($macro,$defn) = each %macro )
	{
		$text =~ s/$macro/$defn/;
	}
	return $text;
}

$grammar =
q{
	file     : line(s)

line	 : include
		 | macrodef
		 | linedir
			{ $thisline = $item[1]; }
		 | codeline
			{ print "found: [$item[1]] at $thisline\n" }

include	 : '#include' filename
			{
			  print "pre: [$text] at $thisline\n";
			  $text = ::loadfile($item[-1]) . $text;
			  Parse::RecDescent::LineCounter::resync $thisline;
			  print "post: [$text] at $thisline\n";
			}

filename : '"' m#[a-z0-9_./-]+#i '"'
			{ $return = $item[-2] }
		 | '<' m#[a-z0-9_./-]+#i '>'
			{ $return = $item[-2] }

macrodef : '#define' /[a-z]\w*/i /.*/
			{ $::macro{$item[-2]} = $item[-1] }

linedir:   '#line' /\d+/

codeline : /.*\n/
			{ $return = ::demacro($item[-1]); }

};

$parse = new Parse::RecDescent ($grammar);

undef $/;

$reinput = $input = <>;

$parse->file($input) or die "Bad file! No biscuit!\n";

$parse->file($reinput) or die "Bad file! No biscuit!\n";

[-] demo_cpp.pl [edit]
[-] demo_autorule.pl [edit]
[-] demo_errors.pl [edit]
[-] demo_piecewise.pl [edit]
[-] demo_logic.pl [edit]
[-] demo_skipcomment.pl [edit]
[-] demo_implicit.pl [edit]
[-] demo_separators.pl [edit]
[-] demo_perlparsing.pl [edit]
[-] demo_street.pl [edit]
[-] demo_scoredsep.pl [edit]
[-] demo.c [edit]
[-] demo_textgen.pl [edit]
[-] demo.pl [edit]
[-] demo_calc.pl [edit]
[+] ..
[-] demo_another_Cgrammar.pl [edit]
[-] demo_matchrule2.pl [edit]
[-] demo_mccoy.pl [edit]
[-] demo_restructure_painful.pl [edit]
[-] demo_methods.pl [edit]
[-] demo_language.pl [edit]
[-] demo_selfmod.pl [edit]
[-] demo_OOautoparsetree.pl [edit]
[-] demo_codeblock.pl [edit]
[-] demo_simplequery.pl [edit]
[-] demo_restructure_easy.pl [edit]
[-] demo_tokens.pl [edit]
[-] demo_decomment.pl [edit]
[-] demo_recipe.pl [edit]
[-] demo_delete.pl [edit]
[-] demo_lisplike.pl [edit]
[-] demo_bad.pl [edit]
[-] demo_arithmetic.pl [edit]
[-] demo_leftassoc.pl [edit]
[-] demo_PerlCSV.pl [edit]
[-] demo_metaRD.pm [edit]
[-] demo_derived.pl [edit]
[-] demo_opreps.pl [edit]
[-] demo_matchrule.pl [edit]
[-] demo_LaTeXish_autoact.pl [edit]
[-] demo_operator.pl [edit]
[-] demo_autoscoresep.pl [edit]
[-] demo_Cgrammar_v2.pl [edit]
[-] demo_NL2SQL.pl [edit]
[-] demo_Cgrammar.pl [edit]
[-] demo_randomsentence.pl [edit]
[-] demo_template.pl [edit]
[-] demo_quicklist.pl [edit]
[-] demo_itemhash.pl [edit]
[-] demo_buildcalc.pl [edit]
[-] demo_leftop.pl [edit]
[-] demo_decomment_nonlocal.pl [edit]
[-] demo_dot.pl [edit]
[-] demo_LaTeXish.pl [edit]
[-] demo_precalc.pl [edit]
[-] demo_eval.pl [edit]
[-] demo_autostub.pl [edit]
[-] demo_whoson.pl [edit]
[-] demo_lexer.pl [edit]
[-] demo_OOparsetree.pl [edit]
[-] demo_parsetree.pl [edit]
[-] demo_simple.pl [edit]
[-] demo_embedding.pl [edit]
[-] demo_simpleXML.pl [edit]
[-] demo_undumper.pl [edit]