The following code appears to be valid C++, accepted by all major compilers:
#include <string>
#include <iostream>
auto main()
-> int
{
using namespace std::string_literals;
std::cout << "Hello"s.length();
}
The following, however, is rejected by both trunk versions of Clang and GCC (while being accepted by VC14):
#include <chrono>
#include <iostream>
auto main()
-> int
{
using namespace std::chrono_literals;
std::cout << 42s.count(); // COMPILER ERROR HERE WITH CLANG AND GCC
}
Changing the problematic line to (42s).count() or 42s .count() fixes the problem. A similar situation occurs with complex UDLs (again, rejected by Clang and GCC, accepted by VC):
#include <complex>
#include <iostream>
auto main()
-> int
{
using namespace std::complex_literals;
std::cout << 42i.imag(); // COMPILER ERROR HERE WITH CLANG AND GCC
}
Is there a bug with parsing integer literals in Clang and GCC?
