PATH:
usr
/
share
/
doc
/
perl-Parse-RecDescent-1.967009
/
demo
#!/usr/bin/perl -sw # PARSE LOGICAL EXPRESSIONS use Parse::RecDescent; $grammar = q{ expr : '[' <leftop: atom /,?/ atom>(?) ']' { $item[2] } | '[[' atomlist ']]' { $item[2] } | disj no_garbage { $item[1] } | <rightop: atom '=' num> | <leftop: atom '<<' num> atomlist: <leftop: atom /,?/ atom> no_garbage: /^\s*$/ | <error: Trailing garbage: $text> disj : <leftop: conj /(or)/ conj > conj : <leftop: unary 'and' unary > and : 'and' unary : 'not' atom | '(' expr ')' { $item[2] } | atom atom : /(?!and|or)[a-z]/ num : /\d+/ }; $parse = new Parse::RecDescent ($grammar) or die "bad grammar"; $input = ''; use Data::Dumper; print "> "; while (<>) { if (/^\.$/) { print STDERR Data::Dumper->Dump([$parse->expr($input)]); $input = '' } else { $input .= $_ } print "> "; }
[-] 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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