void StereotypeDefinitionParser::expectColon()
{
expectOperator(OPERATOR_COLON, QStringLiteral(":"));
}
AST* Parser::expression(int pri, Scope* ps)
{
Position begin = lex_->peek().range_.begin_;
if (pri > 11)
{
if (expect("delete")
|| expect("++")
|| expect("--"))
{
Token op = lex_->get();
AST* expr = leftExpression(ps);
Position end = lex_->peek().range_.begin_;
auto ret = new UniExpression(PositionRange(begin, end), op, expr);
ret->scope_ = ps;
return ret;
}
else if (expect("void")
|| expect("typeof")
|| expect("+")
|| expect("-")
|| expect("~")
|| expect("!"))
{
Token op = lex_->get();
AST* expr = expression(pri, ps);
Position end = lex_->peek().range_.begin_;
auto ret = new UniExpression(PositionRange(begin, end), op, expr);
ret->scope_ = ps;
return ret;
}
else
{
AST* expr = leftExpression(ps);
if (expect("++") || expect("--"))
{
Token op = lex_->get();
Position end = lex_->peek().range_.begin_;
auto ret = new UniExpression(PositionRange(begin, end), expr, op);
ret->scope_ = ps;
return ret;
}
return expr;
}
}
AST* left = expression(pri+1, ps);
if (!expectOperator(pri))
{
return left;
}
Token op = lex_->get();
if (pri == 1)
{
AST* first = expression(pri, ps);
match(":");
AST* second = expression(pri, ps);
Position end = lex_->peek().range_.begin_;
auto ret = new TriExpression(PositionRange(begin, end), left, first, second);
ret->scope_ = ps;
return ret;
}
AST* right = expression(pri, ps);
Position end = lex_->peek().range_.begin_;
AST* ret = new BiExpression(PositionRange(begin, end), left, op, right);
ret->scope_ = ps;
while (expectOperator(pri))
{
op = lex_->get();
right = expression(pri+1, ps);
ret = new BiExpression(PositionRange(begin, end), left, op, right);
ret->scope_ = ps;
}
return ret;
}
void StereotypeDefinitionParser::expectComma()
{
expectOperator(OPERATOR_COMMA, QStringLiteral(","));
}
