Move details of to separate header

Author: Eczbek

include/rsl/_impl/macro/define_static_array.hpp

@@ -0,0 +1,10 @@
+#pragma once
+#include <meta>
+
+#include "compiler.hpp"
+
+#if RSL_COMPILER == RSL_COMPILER_GCC
+#  define RSL_DEFINE_STATIC_ARRAY(...) [:::std::meta::reflect_constant_array(__VA_ARGS__):]
+#else
+#  define RSL_DEFINE_STATIC_ARRAY(...) (::std::define_static_array(__VA_ARGS__))
+#endif

include/rsl/macro

@@ -3,6 +3,7 @@
 #include <rsl/_impl/macro/compiler.hpp>
 #include <rsl/_impl/macro/opt.hpp>
 #include <rsl/_impl/macro/os.hpp>
+#include <rsl/_impl/macro/define_static_array.hpp>
 #include <rsl/_impl/macro/loop.hpp>
 #include <rsl/_impl/macro/diagnostic.hpp>
 
@@ -37,11 +38,7 @@
 #define $enable_if(...) RSL_ENABLE_IF(__VA_ARGS__)
 
 //! Workaround for expansion statements in GCC
-#if $compiler_is(GCC)
-#  define $define_static_array(...) [:::std::meta::reflect_constant_array(__VA_ARGS__):]
-#else
-#  define $define_static_array(...) (::std::define_static_array(__VA_ARGS__))
-#endif
+#define $define_static_array(...) RSL_DEFINE_STATIC_ARRAY(__VA_ARGS__)
 
 /** Applies `macro` to every element and inserts delimiters produced by `delim` between elements
  * @param macro function-like macro applied to every element