Resolve MSVC warning C5260 (#1049)

* Test solution * Mark dynamic_extent as inline, compiler-version-permitting
microsoft · Jul 19, 2022 · 330583f · 330583f
1 parent d9fc52e
commit 330583f
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diff --git a/include/gsl/span_ext b/include/gsl/span_ext
@@ -41,7 +41,7 @@ namespace gsl
 {
 
 // [span.views.constants], constants
-constexpr const std::size_t dynamic_extent = narrow_cast<std::size_t>(-1);
+GSL_INLINE constexpr const std::size_t dynamic_extent = narrow_cast<std::size_t>(-1);
 
 template <class ElementType, std::size_t Extent = dynamic_extent>
 class span;

diff --git a/include/gsl/util b/include/gsl/util
@@ -45,6 +45,12 @@
 #define GSL_NODISCARD
 #endif // defined(__cplusplus) && (__cplusplus >= 201703L)
 
+#if defined(__cpp_inline_variables)
+#define GSL_INLINE inline
+#else
+#define GSL_INLINE
+#endif
+
 namespace gsl
 {
 //