public Expression parseSimpleLiteral() {
switch (lookAheadGrouped()) {
case KW_TRUE:
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();