nl_tokens: ES#sec - regexpinitialize Runtime Semantics : RegExpInitialize ( obj pattern flags )
pl_tokens: function RegExpInitialize ( object , pattern , flags ) { pattern = IS_UNDEFINED ( pattern ) ? '' : TO_STRING ( pattern ) ; flags = IS_UNDEFINED ( flags ) ? '' : TO_STRING ( flags ) ; % RegExpInitializeAndCompile ( object , pattern , flags ) ; return <mask> ; }