Changeset ca8d393 in mainline for uspace/lib/cpp/include/internal/aux.hpp

Timestamp:

2018-07-05T21:41:24Z (6 years ago)

Author:

Dzejrou <dzejrou@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

08c1df0

Parents:

bfc972e

git-author:

Dzejrou <dzejrou@…> (2018-05-16 17:20:04)

git-committer:

Dzejrou <dzejrou@…> (2018-07-05 21:41:24)

Message:

cpp: aux::value_is is now an alias to integral_constant for compatibility, added naive implementations of the last two typetraits make_signed and make_unsigned

File:

• uspace/lib/cpp/include/internal/aux.hpp (modified) (2 diffs)

uspace/lib/cpp/include/internal/aux.hpp

@@ -30 +30 @@
 #define LIBCPP_AUX
 
+namespace std
+{
+    /**
+     * 20.10.3, helper class:
+     */
+
+    template<class T, T v>
+    struct integral_constant
+    {
+        static constexpr T value = v;
+
+        using value_type = T;
+        using type       = integral_constant<T, v>;
+
+        constexpr operator value_type() const noexcept
+        {
+            return value;
+        }
+
+        constexpr value_type operator()() const noexcept
+        {
+            return value;
+        }
+    };
+
+    using true_type = integral_constant<bool, true>;
+    using false_type = integral_constant<bool, false>;
+}
+
 namespace std::aux
 {
@@ -55 +84 @@
     };
 
+    // For compatibility with integral_constant.
     template<class T, T v>
-    struct value_is
-    {
-        static constexpr T value = v;
-    };
+    using value_is = std::integral_constant<T, v>;
 }