[Qt-creator] Use #pragma once as default instead of header guards

[Joerg Bornemann]

On 13-Jan-16 16:43, Coda Highland wrote:

> #pragma once isn't non-standard. It's defined by the C++11
> specification and a compliant compiler MUST support it.

Can you show me where this is defined?
AFAICT it is widely supported, but not part of the standard.


Cheers,

Joerg