case KW_FALSE:
consumeLookAhead();
return conclude(srOf(lastLexElement(), new ExpLiteralBool(lastLexElement().type == DeeTokens.KW_TRUE)));
case KW_THIS:
consumeLookAhead();
return conclude(srOf(lastLexElement(), new ExpThis()));
case KW_SUPER:
consumeLookAhead();
return conclude(srOf(lastLexElement(), new ExpSuper()));
case KW_NULL:
consumeLookAhead();