http://llvm.org/bugs/show_bug.cgi?id=11387
Bug #: 11387
Summary: template classes are never "trivial" in C++0x
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++0x
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
clang trunk r144645, libstdc++ 4.6.2.
A template class with an explicitly defaulted constructor is never "trivial"
according to std::is_trivial, even if the template argument is never used.
template<typename T> struct OK {};
template<typename T> struct Foo { Foo() = default; };
struct Bar { Foo<int> foo; };
#include <type_traits>
static_assert(std::is_trivial<OK<int>>::value, "OK");
static_assert(std::is_trivial<Foo<int>>::value, "Foo");
static_assert(std::is_trivial<Bar>::value, "Bar");
This succeeds for class "OK", because it does not have an explicit constructor.
Class "Foo" fails when it has a defaulted constructor, and so class "Bar" also
fails.
Related: Bug 11295, Bug 10442.
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