nl_tokens: exec rule
pl_tokens: function exec ( ruleId ) { if ( ! executedRuleCache . hasOwnProperty ( ruleId ) ) { var r ; try { r = rules [ ruleId ] ( <mask> ) ; } catch ( e ) { r = e ; try { if ( process . env . DEVELOPE_SELF ) { // only visible when develop its self console . warn ( "failed to execute rule '" . concat ( ruleId , "'" ) , e ) ; } } catch ( e2 ) { } } executedRuleCache [ ruleId ] = r ; } return executedRuleCache [ ruleId ] ; }