Why is Q_DECL_NOEXCEPT macro empty using C++11?

Suares

I'm using Qt 5.7.1 clang 64. Clang version - Apple LLVM version 8.0.0 (clang-800.0.42.1)
If I write Q_DECL_NOEXCEPT or Q_DECL_CONSTEXPR macros in my code and follow symbol under cursor (F2) I'm getting:

# define Q_DECL_CONSTEXPR
# define Q_DECL_NOEXCEPT

I thought above macros must be:

# define Q_DECL_CONSTEXPR constexpr
# define Q_DECL_NOEXCEPT noexcept

I put in .pro file such line:
CONFIG += c++11
actually it's by default there.

Could you possibly tell me how I can fix that?

UPD: And Q_NULLPTR is NULL instead of nullptr. Hmmm...

SGaist

Hi,

Check whether Q_COMPILER_NOEXCEPT is defined.

The compiler detection header is pretty complex so I wouldn't be surprised that you get shown the wrong line.

Suares

@SGaist

Hi! No, it isn't defined in my case.

SGaist

How did you test that ?

I just checked and its defined properly as it should.

Suares

@SGaist

Opened qcompilerdetection.h header file.

alt text

I was surprised to see that all C++11 features weren't detected. Hmmm...

Chris Kawa

@Suares Have you actually confirmed that it doesn't get defined during compilation or are you just talking about the colorization in the editor? These can sometimes go out of sync.

SGaist

Reading a file in an IDE is not a test.

Like I wrote before, this file does a set of lengthy tests to determine what the compiler is capable of. Qt Creator can't get that in sync with the compiler(s) used to build your project.

Suares

@Chris-Kawa @SGaist

I've just checked noexcept, nullptr, ... specifiers instead of Q_DECL_NOEXCEPT, Q_NULLPTR, ... and everything is okay.
I thought if macros are disabled (without highlighting like in above image) then Qt didn't determine C++ features.

I think I can mark issue as resolved. Thank you!