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PR libstdc++/86398 fix std::is_trivially_constructible regression 

The intrinsic doesn't check for allowed conversions between scalar
types, so restore the std::is_constructible check.

Also make some trivial whitespace changes.

	PR libstdc++/86398
	* include/std/type_traits (is_trivially_constructible): Check
	is_constructible before __is_trivially_constructible.
	* testsuite/20_util/is_trivially_constructible/value.cc: Add more
	tests, including negative cases.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Use
	zero for dg-error lineno.
	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
	Likewise.

From-SVN: r262379
This commit is contained in:
Jonathan Wakely 2018-07-04 10:03:18 +01:00 committed by Jonathan Wakely
parent 90fc44ecfa
commit e9029d55f2
5 changed files with 100 additions and 74 deletions
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10
libstdc++-v3/ChangeLog
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@ -1,5 +1,15 @@
2018-07-04 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/86398
* include/std/type_traits (is_trivially_constructible): Check
is_constructible before __is_trivially_constructible.
* testsuite/20_util/is_trivially_constructible/value.cc: Add more
tests, including negative cases.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Use
zero for dg-error lineno.
* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
Likewise.
* include/std/bit (__rotl, __rotr): Avoid branch.
(_If_is_unsigned_integer): Use remove_cv_t.
* testsuite/26_numerics/bit/bitops.count/popcount.cc: New.

3
libstdc++-v3/include/std/type_traits
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@ -1136,7 +1136,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// is_trivially_constructible
template<typename _Tp, typename... _Args>
struct is_trivially_constructible
: public __bool_constant<__is_trivially_constructible(_Tp, _Args...)>
: public __and_<is_constructible<_Tp, _Args...>, __bool_constant<
__is_trivially_constructible(_Tp, _Args...)>>::type
{ };
/// is_trivially_default_constructible

20
libstdc++-v3/testsuite/20_util/is_trivially_constructible/value.cc
View File

@ -54,6 +54,24 @@ void test01()
int, int&&>(true), "");
static_assert(test_property<is_trivially_constructible,
int, const int&>(true), "");
static_assert(test_property<is_trivially_constructible,
int, void*>(false), "PR 86398");
static_assert(test_property<is_trivially_constructible,
int, int*>(false), "PR 86398");
static_assert(test_property<is_trivially_constructible,
int, const int*>(false), "PR 86398");
static_assert(test_property<is_trivially_constructible,
int*, void*>(false), "PR 86398");
static_assert(test_property<is_trivially_constructible,
int*, const int*>(false), "PR 86398");
static_assert(test_property<is_trivially_constructible,
int&, const int>(false), "");
static_assert(test_property<is_trivially_constructible,
const int&, int>(true), "");
static_assert(test_property<is_trivially_constructible,
const int&, int&>(true), "");
static_assert(test_property<is_trivially_constructible,
const int*, int*>(true), "");
static_assert(test_property<is_trivially_constructible,
PolymorphicClass>(false), "");
static_assert(test_property<is_trivially_constructible,
@ -162,6 +180,4 @@ void test01()
MoveOnly, const MoveOnly&>(false), "");
static_assert(test_property<is_trivially_constructible,
MoveOnly2>(false), "");
}

2
libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs_neg.cc
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@ -47,4 +47,4 @@ void test01()
// { dg-error "required from here" "" { target *-*-* } 39 }
// { dg-error "required from here" "" { target *-*-* } 41 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1825 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 0 }

3
libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc
View File

@ -47,5 +47,4 @@ void test01()
// { dg-error "required from here" "" { target *-*-* } 39 }
// { dg-error "required from here" "" { target *-*-* } 41 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1708 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 0 }