Add helper macro BOOST_IF_CONSTEXPR.

2020-01-24 18:33:21 +00:00
parent 9d79e8111a
commit 9aaa4edda1
3 changed files with 20 additions and 0 deletions
@@ -51,6 +51,12 @@ struct no_unique
   BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS empty b;
 };

+template <bool b>
+struct trait
+{
+   enum { value = b };
+};
+

 int main()
 {
@@ -66,6 +72,11 @@ int main()
         always_throw();
      nodiscard_struct s;
      no_unique no_un;
+
+      BOOST_IF_CONSTEXPR(trait<true>::value)
+      {
+         result += 2;
+      }
   }
   catch(int)
   {