Yes, its called Higher Order Perl :)

See Marpa#EXAMPLE 1: A SIMPLE CALCULATOR

See http://search.cpan.org/dist/HOP-Lexer/lib/HOP/Lexer/Article.pod Lexing Without Grammars: When Regular Expressions Suck

http://hop.perl.plover.com/Examples/ALL/calculator

Regexp::Grammars Calculator

http://cpansearch.perl.org/src/DCONWAY/Parse-RecDescent-1.965001/demo/demo_calc.pl

In reply to Re: How to avoid eval()? by Anonymous Monk
in thread How to avoid eval()? by emilbarton

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