Hi mclow.lists, jroelofs, danalbert, K-ballo,
This patch adds <experimental/chrono> which only contains a single variable
template.
See: https://rawgit.com/cplusplus/fundamentals-ts/v1/fundamentals-ts.html#time
http://reviews.llvm.org/D7352
Files:
include/experimental/chrono
test/libcxx/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
test/libcxx/experimental/utilities/time/version.pass.cpp
test/std/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
test/std/experimental/utilities/time/header.chrono.synop/treat_as_floating_point_v.pass.cpp
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Index: include/experimental/chrono
===================================================================
--- /dev/null
+++ include/experimental/chrono
@@ -0,0 +1,56 @@
+// -*- C++ -*-
+//===------------------------------ chrono ---------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_EXPERIMENTAL_CHRONO
+#define _LIBCPP_EXPERIMENTAL_CHRONO
+
+/**
+ experimental/chrono synopsis
+
+// C++1y
+
+#include <chrono>
+
+namespace std {
+namespace chrono {
+namespace experimental {
+inline namespace fundamentals_v1 {
+
+ // See C++14 20.12.4, customization traits
+ template <class Rep> constexpr bool treat_as_floating_point_v
+ = treat_as_floating_point<Rep>::value;
+
+} // namespace fundamentals_v1
+} // namespace experimental
+} // namespace chrono
+} // namespace std
+
+ */
+
+#include <experimental/__config>
+#include <chrono>
+
+#if _LIBCPP_STD_VER > 11
+
+namespace std { namespace chrono { namespace experimental {
+ inline namespace fundamentals_v1 {
+
+#if __has_feature(cxx_variable_templates)
+
+template <class _Rep> _LIBCPP_CONSTEXPR bool treat_as_floating_point_v
+ = treat_as_floating_point<_Rep>::value;
+
+#endif /* __has_feature(cxx_variable_templates) */
+
+}}}} // namespace std::chrono::experimental::fundamentals_v1
+
+#endif /* _LIBCPP_STD_VER > 11 */
+
+#endif /* _LIBCPP_EXPERIMENTAL_CHRONO */
\ No newline at end of file
Index: test/libcxx/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
===================================================================
--- /dev/null
+++ test/libcxx/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
@@ -0,0 +1,22 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <experimental/chrono>
+
+#include <experimental/chrono>
+
+#if _LIBCPP_STD_VER > 11
+# ifndef _LIBCPP_CHRONO
+# error "<experimental/chrono> must include <chrono>"
+# endif
+#endif
+
+int main()
+{
+}
Index: test/libcxx/experimental/utilities/time/version.pass.cpp
===================================================================
--- /dev/null
+++ test/libcxx/experimental/utilities/time/version.pass.cpp
@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <experimental/chrono>
+
+#include <experimental/chrono>
+
+#ifndef _LIBCPP_VERSION
+#error _LIBCPP_VERSION not defined
+#endif
+
+int main()
+{
+}
Index: test/std/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
===================================================================
--- /dev/null
+++ test/std/experimental/utilities/time/header.chrono.synop/includes.pass.cpp
@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <experimental/chrono>
+
+#include <experimental/chrono>
+
+int main()
+{
+ // Check that <chrono> has been included.
+ std::chrono::seconds s;
+ ((void)s);
+}
Index: test/std/experimental/utilities/time/header.chrono.synop/treat_as_floating_point_v.pass.cpp
===================================================================
--- /dev/null
+++ test/std/experimental/utilities/time/header.chrono.synop/treat_as_floating_point_v.pass.cpp
@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/chrono>
+
+// template <class Rep> constexpr bool treat_as_floating_point_v;
+
+#include <experimental/chrono>
+#include <type_traits>
+
+namespace ex = std::chrono::experimental;
+namespace cr = std::chrono;
+
+template <class T, bool Expect>
+void test()
+{
+ static_assert(
+ ex::treat_as_floating_point_v<T> == Expect, ""
+ );
+ static_assert(
+ ex::treat_as_floating_point_v<T> == cr::treat_as_floating_point<T>::value, ""
+ );
+}
+
+int main()
+{
+ {
+ static_assert(
+ std::is_same<
+ decltype(ex::treat_as_floating_point_v<float>), const bool
+ >::value, ""
+ );
+ }
+ test<int, false>();
+ test<unsigned, false>();
+ test<char, false>();
+ test<bool, false>();
+ test<float, true>();
+ test<double, true>();
+ test<long double, true>();
+}
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