Build Failed While Enabling Swizzle

[stronger1234]

Hello!
I'm building glm-0.9.8.3 using VS Community 2015 Update 3, enabling all test during CMake configuration and generation. Then, when the building came to "test-bug_ms_vec_static", it occurred a compiler internal error. Then I opened this test case and found it enables the SWIZZLE feature. Maybe this feature cause the compiler to use too much memory, but I've no idea how to fixed it. Is there any solution?

[Groovounet]

Hi,

I am not seeing this issue in VS 2015 pro.
Can you declare GLM_FORCE_MESSAGES and report what the compiler returns?

Thanks,
Christophe

[Groovounet]

This said, this is a known bug and this is why this test was created. However, this doesn't prevent you to use GLM.

Thanks,
Christophe

[stronger1234]

Thanks for your answer!
Swizzle is really a cool feature and I'm interesting in using it. But once I defined GLM_FORCE_SWIZZLE and declared some vec2/3/4 variables, the compiler would report this:

1>------ Build started: Project: xxx, Configuration: Debug Win32 ------
1> mycode.cpp
1>e:\xxx\xxx\mycode.cpp(2): fatal error C1001: An internal error has occurred in the compiler.
1> (compiler file 'msc1.cpp', line 1468)
1> To work around this problem, try simplifying or changing the program near the locations listed above.
1> Please choose the Technical Support command on the Visual C++
1> Help menu, or open the Technical Support help file for more information
1> INTERNAL COMPILER ERROR in 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\CL.exe'
1> Please choose the Technical Support command on the Visual C++
1> Help menu, or open the Technical Support help file for more information
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

-------------here is mycode.cpp --------------
#define GLM_FORCE_SWIZZLE
#include <glm/glm.hpp>
using namespace glm;
vec4 a;
void main() {
return;
}
------------ end of mycode.cpp -------------

And when I removed the macro GLM_FORCE_SWIZZLE, it compiled successfully. So it did prevent me from using Swizzle.

[Groovounet]

I could reproduce the issue... I'll look at it!

[Groovounet]

This issue doesn't prevent you to use swizzle expressions.

The compiler bug only prevent to declare globals using GLM types.

I filled a bug to Microsoft a while ago...

Thanks,
Christophe

[Groovounet]

The following code building with Visual Studio 2015 SP3 in debug and x64 using language extension cause the Visual C++ compiler to crash.

struct vec2;

struct _swizzle
{
	char _buffer[1];
};

struct vec2
{
	constexpr vec2(float x, float y) :
		x(x), y(y)
	{}

	union
	{
		struct { float x, y; };
		struct { _swizzle xx; };
	};
};

// Visual C++ has a bug generating the error: fatal error C1001: An internal error has occurred in the compiler.
vec2 const Bar(1.f, 1.f);

int main()
{
	return 0;
}

I'll provide a workaround for GLM 0.9.8.4.

Thanks for reporting,
Christophe