Hello
With the clang code model there is a problem to generate a preamble file with
header guards. Imaging a preamble file is like a automatically pre compiled
header for the include block at the top. But there are limitations. One is that
every ifndef has to match is #endif inside of the preamble but this not the
case for header guards.
#ifndef HEADER_GUARD
#define HEADER_GUARD
#include <QtGui> // this would be compiled in the preamble once
void foo()
{
auto bahn = nullptr;
}
#endif
We don't generate a preamble for this case because the opening ifndefs is not
matching the endif. In that case the clang model will be very slow!
So I propose we change our wizards to utilize #pragma once and use it for every
new file. We can change header files where we need code completion on demand
too.
https://en.wikipedia.org/wiki/Pragma_once
Best regards, Marco
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