PATH:
usr
/
share
/
doc
/
perl-Parse-RecDescent-1.967009
/
demo
#!/usr/bin/perl -sw # A SELF-MODIFYING**2 PARSER use Parse::RecDescent; $grammar = q{ type_defn : 'only' <commit> "$::keyword" is type_name ';' { $thisparser->Replace("type_name: '$item[5]'"); print "\"$item[5]\" is now the only valid type name\n"; } | "$::keyword" <commit> identifier(s) is type_name /('?s)?/ ';' { my $newnames = join " | ", map { "'$_'" } @{$item[3]}; $thisparser->Extend("type_name: $newnames"); print "added $newnames as type name(s)\n"; } | /change\s+$::keyword\s+to/ identifier { $::keyword = $item[2]; print "changed $item[0] keyword to: $item[2]\n"; } | <error> is : /is|are/ type_name : 'int' | 'float' identifier: ...!is ...!"$::keyword" ...!type_name /[A-Za-z]\w*/ }; use vars qw { $keyword }; $keyword = "type"; $parse = new Parse::RecDescent ($grammar); while (<>) { $parse->type_defn($_) or print "huh?\n"; }
[-] demo_cpp.pl
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[-] demo_autorule.pl
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[-] demo_errors.pl
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[-] demo_piecewise.pl
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[-] demo_logic.pl
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[-] demo_skipcomment.pl
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[-] demo_implicit.pl
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[-] demo_separators.pl
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[-] demo_perlparsing.pl
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[-] demo_street.pl
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[-] demo_scoredsep.pl
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[-] demo.c
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[-] demo_textgen.pl
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[-] demo.pl
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[-] demo_calc.pl
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[+]
..
[-] demo_another_Cgrammar.pl
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[-] demo_matchrule2.pl
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[-] demo_mccoy.pl
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[-] demo_restructure_painful.pl
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[-] demo_methods.pl
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[-] demo_language.pl
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[-] demo_selfmod.pl
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[-] demo_OOautoparsetree.pl
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[-] demo_codeblock.pl
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[-] demo_simplequery.pl
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[-] demo_restructure_easy.pl
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[-] demo_tokens.pl
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[-] demo_decomment.pl
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[-] demo_recipe.pl
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[-] demo_delete.pl
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[-] demo_lisplike.pl
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[-] demo_bad.pl
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[-] demo_arithmetic.pl
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[-] demo_leftassoc.pl
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[-] demo_PerlCSV.pl
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[-] demo_metaRD.pm
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[-] demo_derived.pl
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[-] demo_opreps.pl
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[-] demo_matchrule.pl
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[-] demo_LaTeXish_autoact.pl
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[-] demo_operator.pl
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[-] demo_autoscoresep.pl
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[-] demo_Cgrammar_v2.pl
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[-] demo_NL2SQL.pl
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[-] demo_Cgrammar.pl
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[-] demo_randomsentence.pl
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[-] demo_template.pl
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[-] demo_quicklist.pl
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[-] demo_itemhash.pl
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[-] demo_buildcalc.pl
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[-] demo_leftop.pl
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[-] demo_decomment_nonlocal.pl
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[-] demo_dot.pl
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[-] demo_LaTeXish.pl
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[-] demo_precalc.pl
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[-] demo_eval.pl
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[-] demo_autostub.pl
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[-] demo_whoson.pl
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[-] demo_lexer.pl
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[-] demo_OOparsetree.pl
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[-] demo_parsetree.pl
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[-] demo_simple.pl
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[-] demo_embedding.pl
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[-] demo_simpleXML.pl
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[-] demo_undumper.pl
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