Explicit specialization in define causes error: explicit specialization in non-namespace scope

Asked May 10 '20 at 14:21

Active May 14 '20 at 01:27

Viewed 165 times

I'm getting explicit specialization in non-namespace scopeerror from this define:

#define DECLARE_INTERNAL_LINK_SPECIALIZATION(T, Counter) template<> struct T<Counter>

This is how the define is used, which triggers the error:

#define DECLARE_INTERNAL_LINK_BASE(T) template<int Counter> struct T
#define DECLARE_INTERNAL_LINK_SPECIALIZATION(T, Counter) template<> struct T<Counter>

namespace TestBugFix
{
    struct FPlatformTypeLayoutParameters
    {
        DECLARE_INTERNAL_LINK_BASE(InternalLinkType);
        DECLARE_INTERNAL_LINK_SPECIALIZATION(InternalLinkType, __COUNTER__);
    };
}

I believe I'm getting this as defines do not have namespace scope. This works fine for clang, but not GCC. How may I implement the same functionality within namespace scope?

edited May 14 '20 at 01:27

asked May 10 '20 at 14:21

ZeroPhase

2

https://stackoverflow.com/help/minimal-reproducible-example – M.M May 10 '20 at 14:26
a `#define` directive by itself cannot possibly cause any such error. It's all in how you use the defined macro. – n. m. could be an AI May 10 '20 at 14:27
Updated with the specific code causing the error. – ZeroPhase May 14 '20 at 02:08
Looks like this is a bug in gcc. – ZeroPhase May 17 '20 at 01:01

Explicit specialization in define causes error: explicit specialization in non-namespace scope

0 Answers0