User-defined literals, C++14

I'm trying to insert C++14 style user-defined literal suffixes into my code:

Code:

---

# include <iostream>
# include <string>

int main()
{
    auto str = "hello world"s;
}

---

Getting some variant of the following error message with GCC 4.9 (via C::B), MinGW7.1 (via nuwen-distro) and also online at coliru and cpp.sh:

Code:

---

error: unable to find numeric literal operator 'operator""i'|
note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|

---

Trying to compile with either of the above doesn't help either. Any suggestions re using such literals v welcome. Thanks.

Are you sure that suffix exists? There is a ""s one in std::chrono, but that's for seconds.

This works on VS 2015 CE

Code:

---

#include <iostream>
#include <string>

using namespace std::string_literals;

int main()
{
  auto str = "hello world"s;
}

---

User-defined literals — Part I | Andrzej's C++ blog

See first response from Andrzej Krzemieński

Yup, that works here too. So the feature was not in scope Sean, that's all.

Thanks, that clears it up.

thanks