Expose the time remaining in HHWheelTimer::Callback

[folly.git] / folly / test / FunctionRefTest.cpp

diff --git a/folly/test/FunctionRefTest.cpp b/folly/test/FunctionRefTest.cpp
index 02bb213dab06820362afad82fe3e4837733f4d3a..6ddf62ad44e1c4cf4ffa9f58c41468df6d9926f4 100644 (file)
--- a/folly/test/FunctionRefTest.cpp
+++ b/folly/test/FunctionRefTest.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,53 @@
 using folly::Function;
 using folly::FunctionRef;
 
+TEST(FunctionRef, Traits) {
+  static_assert(std::is_literal_type<FunctionRef<int(int)>>::value, "");
+// Some earlier versions of libstdc++ lack these traits. Frustrating that
+// the value of __GLIBCXX__ doesn't increase with version, but rather reflects
+// release date, so some larger values of __GLIBCXX__ lack the traits while
+// some smaller values have them. Can't figure out how to reliably test for the
+// presence or absence of the traits. :-(
+#if !defined(__GLIBCXX__) || __GNUC__ >= 5
+  static_assert(
+      std::is_trivially_copy_constructible<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_trivially_move_constructible<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_trivially_constructible<
+          FunctionRef<int(int)>,
+          FunctionRef<int(int)>&>::value,
+      "");
+  static_assert(
+      std::is_trivially_copy_assignable<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_trivially_move_assignable<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_trivially_assignable<
+          FunctionRef<int(int)>,
+          FunctionRef<int(int)>&>::value,
+      "");
+#endif
+  static_assert(
+      std::is_nothrow_copy_constructible<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_nothrow_move_constructible<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_nothrow_constructible<
+          FunctionRef<int(int)>,
+          FunctionRef<int(int)>&>::value,
+      "");
+  static_assert(
+      std::is_nothrow_copy_assignable<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_nothrow_move_assignable<FunctionRef<int(int)>>::value, "");
+  static_assert(
+      std::is_nothrow_assignable<
+          FunctionRef<int(int)>,
+          FunctionRef<int(int)>&>::value,
+      "");
+}
+
 TEST(FunctionRef, Simple) {
   int x = 1000;
   auto lambda = [&x](int v) { return x += v; };