chromium/chromium-65.0.3325.146-workaround-gcc7-is_trivially_copy_constructable-failure.patch

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2018-03-15 16:17:21 +00:00
diff -up chromium-65.0.3325.146/base/optional.h.784732 chromium-65.0.3325.146/base/optional.h
--- chromium-65.0.3325.146/base/optional.h.784732 2018-03-07 13:40:00.103579631 -0500
+++ chromium-65.0.3325.146/base/optional.h 2018-03-07 13:41:08.950323996 -0500
@@ -9,6 +9,7 @@
#include <utility>
#include "base/logging.h"
+#include "base/template_util.h"
namespace base {
@@ -106,7 +107,7 @@ struct OptionalStorageBase<T, true /* tr
// compiler generated constexpr {copy,move} constructors). Note that
// placement-new is prohibited in constexpr.
template <typename T,
- bool = std::is_trivially_copy_constructible<T>::value,
+ bool = is_trivially_copy_constructible<T>::value,
bool = std::is_trivially_move_constructible<T>::value>
struct OptionalStorage : OptionalStorageBase<T> {
// This is no trivially {copy,move} constructible case. Other cases are
diff -up chromium-65.0.3325.146/base/template_util.h.784732 chromium-65.0.3325.146/base/template_util.h
--- chromium-65.0.3325.146/base/template_util.h.784732 2018-03-07 13:41:19.479131969 -0500
+++ chromium-65.0.3325.146/base/template_util.h 2018-03-07 13:42:41.308639551 -0500
@@ -10,6 +10,7 @@
#include <iterator>
#include <type_traits>
#include <utility>
+#include <vector>
#include "build/build_config.h"
@@ -127,6 +128,23 @@ template <class T>
using is_trivially_copyable = std::is_trivially_copyable<T>;
#endif
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 7
+// Workaround for g++7 and earlier family.
+// Due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80654, without this
+// Optional<std::vector<T>> where T is non-copyable causes a compile error.
+// As we know it is not trivially copy constructible, explicitly declare so.
+template <typename T>
+struct is_trivially_copy_constructible
+ : std::is_trivially_copy_constructible<T> {};
+
+template <typename... T>
+struct is_trivially_copy_constructible<std::vector<T...>> : std::false_type {};
+#else
+// Otherwise use std::is_trivially_copy_constructible as is.
+template <typename T>
+using is_trivially_copy_constructible = std::is_trivially_copy_constructible<T>;
+#endif
+
} // namespace base
#undef CR_USE_FALLBACKS_FOR_GCC_WITH_LIBCXX