nl_tokens: ------------------------------------------------------------------- Harmony Set
pl_tokens: function SetConstructor ( iterable ) { if ( IS_UNDEFINED ( new . target ) ) { throw MakeTypeError ( kConstructorNotFunction , "Set" ) ; } % _SetInitialize ( this ) ; if ( ! IS_NULL_OR_UNDEFINED ( iterable ) ) { var adder = this . <mask> ; if ( ! IS_CALLABLE ( adder ) ) { throw MakeTypeError ( kPropertyNotFunction , adder , 'add' , this ) ; } for ( var value of iterable ) { % _Call ( adder , this , value ) ; } } }