kea-compiler

#!nqp

grammar Kea {

    token TOP { <expr> }
    
    proto token expr { <...> }
    rule expr:sym<+> {  <expr> <expr> '+' }
    rule expr:sym<-> {  <expr> <expr> '-' }
    rule expr:sym<*> {  <expr> <expr> '*' }
    rule expr:sym</> {  <expr> <expr> '/' }

    token expr:sym<value> { \d+ }

}

my $match := Kea.parse('2 4 * 8 +');
_dumper($match);