add integral_constant.hpp.

Author: robertshepherdcpp

integral_constant.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace mlib
+{
+    template <typename T, T I> struct integral_constant {
+        static constexpr T value = I;
+        using value_type = T;
+
+        constexpr operator value_type() const noexcept { return value; }
+
+        constexpr auto operator()() const noexcept { return value; }
+    };
+} // namespace mlib

mlib.vcxproj

@@ -145,6 +145,7 @@
     <ClInclude Include="get_nth_element.hpp" />
     <ClInclude Include="index_sequence.hpp" />
     <ClInclude Include="inlin_if.hpp" />
+    <ClInclude Include="integral_constant.hpp" />
     <ClInclude Include="loop.hpp" />
     <ClInclude Include="meta_struct.hpp" />
     <ClInclude Include="mlib.hpp" />

mlib.vcxproj.filters

@@ -102,6 +102,9 @@
     <ClInclude Include="pack.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="integral_constant.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Main.cpp">