This is the last remaining piece of P0935R0. This adds a default
constructor to each of the streambuf and stream types in <sstream> so
that default construction does not use the 'explicit' constructor that
has a single, defaulted argument.
P0935R0 Eradicating unnecessarily explicit default constructors
* config/abi/pre/gnu.ver: Tighten existing patterns and export new
default constructor symbols.
* include/std/sstream (basic_stringbuf, basic_istringstream)
(basic_ostringstream, basic_stringstream): Remove default arguments
from explicit constructors taking ios_base::openmode and add separate
non-explicit default constructors.
* testsuite/27_io/basic_istringstream/cons/default.cc: New.
* testsuite/27_io/basic_ostringstream/cons/default.cc: New.
* testsuite/27_io/basic_stringstream/cons/default.cc: New.
* testsuite/27_io/basic_stringbuf/cons/char/default.cc: New.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/default.cc: New.
From-SVN: r262474
In C++2a the remove, remove_if and unique members of std::list and
std::forward_list have been changed to return the number of elements
removed. This is an ABI change for the remove members and the
non-template unique members, so an abi-tag is used to give those symbols
new mangled names in C++2a mode. For the function templates the return
type is part of the mangled name so no abi-tag is needed.
* include/bits/forward_list.h (__cpp_lib_list_remove_return_type):
Define.
(forward_list::__remove_return_type): Define typedef as size_type or
void, according to __cplusplus value.
(_GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG): Define macro as abi-tag or
empty, according to __cplusplus value.
(forward_list::remove, forward_list::unique): Use typedef and macro
to change return type and add abi-tag for C++2a.
(forward_list::remove_if<Pred>, forward_list::unique<BinPred>): Use
typedef to change return type for C++2a.
* include/bits/forward_list.tcc (_GLIBCXX20_ONLY): Define macro.
(forward_list::remove, forward_list::remove_if<Pred>)
(forward_list::unique<BinPred>): Return number of removed elements
for C++2a.
* include/bits/list.tcc (_GLIBCXX20_ONLY): Define macro.
(list::remove, list::unique, list::remove_if<Predicate>)
(list::unique<BinaryPredicate>): Return number of removed elements
for C++2a.
* include/bits/stl_list.h (__cpp_lib_list_remove_return_type): Define.
(list::__remove_return_type): Define typedef as size_type or
void, according to __cplusplus value.
(_GLIBCXX_LIST_REMOVE_RETURN_TYPE_TAG): Define macro as abi-tag or
empty, according to __cplusplus value.
(list::remove, list::unique): Use typedef and macro to change return
type and add abi-tag for C++2a.
(list::remove_if<Predicate>, list::unique<BinaryPredicate>): Use
typedef to change return type for C++2a.
* include/std/version (__cpp_lib_list_remove_return_type): Define.
* testsuite/23_containers/forward_list/operations/
remove_cxx20_return.cc: New.
* testsuite/23_containers/forward_list/operations/
unique_cxx20_return.cc: New.
From-SVN: r262423
2018-07-04 Jonathan Wakely <jwakely@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* include/std/bit (__rotl, __rotr): Fix for non-power of two sizes.
Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
From-SVN: r262414
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
P0553R2 is not in the C++2a working draft yet, but is likely to be
approved soon. Neither proposal supports std::byte but this adds
overloads of each function for std::byte, assuming that will also get
added.
* include/Makefile.am: Add new header.
* include/Makefile.in: Regenerate.
* include/precompiled/stdc++.h: Include new header.
* include/std/bit: New header.
(__rotl, __rotr, __countl_zero, __countl_one, __countr_zero)
(__countr_one, __popcount, __ispow2, __ceil2, __floor2, __log2p1):
Define for C++14.
[!__STRICT_ANSI__] (rotl, rotr, countl_zero, countl_one, countr_zero)
(countr_one, popcount): Define for C++2a. Also overload for std::byte.
(ispow2, ceil2, floor2, log2p1): Define for C++2a.
[!__STRICT_ANSI__] (ispow2, ceil2, floor2, log2p1): Overload for
std::byte.
* testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: New.
* testsuite/26_numerics/bit/bit.pow.two/floor2.cc: New.
* testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: New.
* testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: New.
* testsuite/26_numerics/bit/bitops.rot/rotl.cc: New.
* testsuite/26_numerics/bit/bitops.rot/rotr.cc: New.
* testsuite/26_numerics/bit/bitops.count/countl_one.cc: New.
* testsuite/26_numerics/bit/bitops.count/countl_zero.cc: New.
* testsuite/26_numerics/bit/bitops.count/countr_one.cc: New.
* testsuite/26_numerics/bit/bitops.count/countr_zero.cc: New.
From-SVN: r262360
Avoid creation of unnecessary basic_string objects by using a simplified
string_view type and performing comparisons on that type instead. A
temporary basic_string object is still used when the sub_match's
iterators are not contiguous, in order to get an object that the
__string_view can reference.
* include/bits/regex.h (sub_match::operator string_type): Call str().
(sub_match::compare): Use _M_str() instead of str().
(sub_match::_M_compare): New public function.
(sub_match::__string_view): New helper type.
(sub_match::_M_str): New overloaded functions to avoid creating a
string_type object when not needed.
(operator==, operator!=, operator<, operator>, operator<=, operator>=):
Use sub_match::_M_compare instead of creating string_type objects.
Fix Doxygen comments.
* include/bits/regex_compiler.h (__has_contiguous_iter): Remove.
(__is_contiguous_normal_iter): Rename to __is_contiguous_iter and
simplify.
(__enable_if_contiguous_iter, __disable_if_contiguous_iter): Use
__enable_if_t.
* include/std/type_traits (__enable_if_t): Define for C++11.
* testsuite/28_regex/sub_match/compare.cc: New.
* testsuite/util/testsuite_iterators.h (remove_cv): Add transformation
trait.
(input_iterator_wrapper): Use remove_cv for value_type argument of
std::iterator base class.
From-SVN: r262318
This header was needed for the declaration of std::terminate but the
calls to it were removed in r242401.
* include/std/utility: Remove unused <exception> header.
From-SVN: r261749
* include/std/scoped_allocator (__not_pair): Define SFINAE helper.
(construct(_Tp*, _Args&&...)): Remove from overload set when _Tp is
a specialization of std::pair.
* testsuite/20_util/scoped_allocator/construct_pair.cc: Ensure
pair elements are constructed correctly.
From-SVN: r261716
The C++ committee has confirmed that passing a null pointer to the
unary basic_string_view constructor is undefined. This removes the check
from our implementation, and adds the nonnull attribute to warn when the
compiler can detect undefined input.
* include/std/string_view (basic_string_view(const CharT*)): Remove
check for null pointer and add nonnull attribute.
(compare(const CharT*), compare(size_type, size_type, const CharT*))
(find(const CharT*, size_type), rfind(const CharT*, size_type))
(find_first_of(const CharT*, size_type))
(find_last_of(const CharT*, size_type))
(find_first_not_of(const CharT*, size_type))
(find_last_not_of(const CharT*, size_type)): Add nonnull attribute.
* testsuite/21_strings/basic_string_view/cons/char/nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/compare/char/
nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/find/char/
nonnull.cc: New.
* testsuite/21_strings/basic_string_view/operations/rfind/char/
nonnull.cc: New.
From-SVN: r261638
* include/std/future (__constrain_pkgdtask): Replace with ...
(packaged_task::__not_same): New alias template, using
__remove_cvref_t instead of decay.
* include/std/thread (thread::__not_same): Add comment.
From-SVN: r261618
Defining std::tuple_element_t in <utility> makes it available wherever
std::tuple_element is available.
* include/std/tuple (__cpp_lib_tuple_element_t, tuple_element_t):
Move back to <utility>.
* include/std/utility (__cpp_lib_tuple_element_t. tuple_element_t):
Restore to here.
From-SVN: r261604
* include/std/tuple (__cpp_lib_tuple_element_t): Move feature test
macro from <utility> and change type to long.
* include/std/utility (__cpp_lib_tuple_element_t): Remove.
* testsuite/20_util/tuple/tuple_element_t.cc: Check for feature test
macro.
From-SVN: r261596
Because the wide character types are neither signed integer types nor
unsigned integer types they need to be transformed to an integral type
of the correct size and the lowest rank (which is not necessarily the
underlying type). Reuse the helpers for enumeration types to select the
correct integer.
The refactoring of __make_unsigned_selector and __make_signed_selector
slightly reduces the number of template instantiations and so reduces
memory usage.
PR libstdc++/85951
* include/std/type_traits [_GLIBCXX_USE_C99_STDINT_TR1]: Do not define
uint_least16_t and uint_least32_t.
(__make_unsigned<wchar_t>): Define unconditionally.
(__make_unsigned_selector<_Tp, true, false>): Remove intermediate
typedefs.
(__make_unsigned_selector_base): New type to provide helper templates.
(__make_unsigned_selector<_Tp, false, true>): Reimplement using
__make_unsigned_selector_base helpers.
(__make_unsigned<char16_t>, __make_unsigned<char32_t>): Define.
(__make_signed_selector<_Tp, true, false>): Remove intermediate
typedefs.
(__make_signed<wchar_t>, __make_signed<char16_t>)
(__make_signed<char32_t>)): Define unconditionally.
* testsuite/20_util/make_signed/requirements/typedefs-3.cc: Check
wchar_t, char16_t and char32_t are transformed correctly.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc: Adjust
dg-error lineno.
* testsuite/20_util/make_unsigned/requirements/typedefs-3.cc: Check
wchar_t, char16_t and char32_t are transformed correctly.
* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc: Adjust
dg-error lineno.
From-SVN: r261023
The restrictions forbidding arithmetic on atomic pointer types are only
enabled for C++17 and later, retaining the GNU extension for older
standards. The new nested typedefs and changes to prevent scalar
parameters participating in template argument deduction are enabled
unconditionally.
PR libstdc++/69769
PR libstdc++/85886
* include/bits/atomic_base.h (__atomic_base::value_type)
(__atomic_base::difference_type): Add new typedefs.
* include/std/atomic (atomic<bool>::value_type, atomic<T>::value_type)
(atomic<T*>::value_type, atomic<T*>::difference_type): Likewise.
(atomic<T*>::operator++, atomic<T*>::operator--)
(atomic<T*>::operator+=, atomic<T*>::operator-=)
(atomic<T*>::fetch_add, atomic<T*>::fetch_sub): Add static assertion
to enforce C++17 requirement on pointer arithmetic.
(__atomic_val_t, __atomic_diff_t): New alias templates.
(atomic_init, atomic_store_explicit, atomic_exchange_explicit)
(atomic_compare_exchange_weak_explicit)
(atomic_compare_exchange_strong_explicit, atomic_store)
(atomic_exchange, atomic_compare_exchange_weak)
(atomic_compare_exchange_strong): Use __atomic_val_t to make
scalar parameters be non-deduced contexts.
(atomic_fetch_add_explicit, atomic_fetch_sub_explicit)
(atomic_fetch_add, atomic_fetch_sub): Change first parameter to be
atomic instead of __atomic_base, and use __atomic_diff_t for scalar
parameters.
(atomic_fetch_and_explicit, atomic_fetch_or_explicit)
(atomic_fetch_xor_explicit, atomic_fetch_and, atomic_fetch_or)
(atomic_fetch_xor): Use __atomic_val_t for scalar parameters.
(atomic_fetch_add_explicit, atomic_fetch_sub_explicit)
(atomic_fetch_add, atomic_fetch_sub): Remove overloads for atomic
address types.
* testsuite/29_atomics/atomic/60695.cc: Adjust dg-error lineno.
* testsuite/29_atomics/atomic/69769.cc: New test.
* testsuite/29_atomics/atomic/nonmembers.cc: New test.
* testsuite/29_atomics/atomic/operators/pointer_partial_void.cc:
Disable test for C++17 and later.
* testsuite/29_atomics/atomic/requirements/typedefs.cc: New test.
* testsuite/29_atomics/atomic_integral/nonmembers.cc: New test.
* testsuite/29_atomics/atomic_integral/requirements/typedefs.cc: New
test.
From-SVN: r260676
PR libstdc++/81256
* include/bits/fstream.tcc (basic_filebuf::close): Do not swallow
exceptions from _M_terminate_output().
* include/std/fstream (basic_filebuf::~basic_filebuf): Swallow any
exceptions from close().
* testsuite/27_io/basic_filebuf/close/81256.cc: New.
From-SVN: r260236
The standard requires that the std::thread constructor is constrained so
it can't be called with a first argument of type std::thread. The
current implementation only meets that requirement if the constructor is
called with one argument, by using deleted overloads. This uses an
enable_if constraint to enforce the requirement for any number of
arguments.
Also add a static assertion to give a more readable error for invalid
arguments that cannot be invoked. Also simplify _Invoker to reduce the
error cascade for ill-formed instantiations with non-invocable
arguments.
PR libstdc++/84535
* include/std/thread (thread::__not_same): New SFINAE helper.
(thread::thread(_Callable&&, _Args&&...)): Add SFINAE constraint that
first argument is not a std::thread. Add static assertion to check
INVOKE expression is valid.
(thread::thread(thread&), thread::thread(const thread&&)): Remove.
(thread::_Invoke::_M_invoke, thread::_Invoke::operator()): Use
__invoke_result for return types and remove exception specifications.
* testsuite/30_threads/thread/cons/84535.cc: New.
From-SVN: r259893
Store nested closures by value not by reference, to prevent holding
invalid references to temporaries that have been destroyed. This
changes the layout of the closure types, so change their linkage names,
but moving them to a different namespace.
PR libstdc++/57997
PR libstdc++/83860
* include/bits/gslice_array.h (gslice_array): Define default
constructor as deleted, as per C++11 standard.
* include/bits/mask_array.h (mask_array): Likewise.
* include/bits/slice_array.h (slice_array): Likewise.
* include/bits/valarray_after.h (_GBase, _GClos, _IBase, _IClos): Move
to namespace __detail.
(_GBase::_M_expr, _IBase::_M_expr): Use _ValArrayRef for type of data
members.
* include/bits/valarray_before.h (_ValArrayRef): New helper for type
of data members in closure objects.
(_FunBase, _ValFunClos, _RefFunClos, _UnBase, _UnClos, _BinBase)
(_BinBase2, _BinBase1, _BinClos, _SBase, _SClos): Move to namespace
__detail.
(_FunBase::_M_expr, _UnBase::_M_expr, _BinBase::_M_expr1)
(_BinBase::_M_expr2, _BinBase2::_M_expr1, _BinBase1::_M_expr2)
(_SBase::_M_expr): Use _ValArrayRef for type of data members.
* include/std/valarray (_UnClos, _BinClos, _SClos, _GClos, _IClos)
(_ValFunClos, _RefFunClos): Move to namespace __detail and add
using-declarations to namespace std.
* testsuite/26_numerics/valarray/83860.cc: New.
From-SVN: r259844
PR libstdc++/84601
* include/std/optional (_Optional_payload): Split into multiple
specializations that can handle different cases of trivial or
non-trivial assignment operators.
* testsuite/20_util/optional/84601.cc: New.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust.
From-SVN: r258304
PR libstdc++/83658
* include/std/any (any::__do_emplace): Only set _M_manager after
constructing the contained object.
* testsuite/20_util/any/misc/any_cast_neg.cc: Adjust dg-error line.
* testsuite/20_util/any/modifiers/83658.cc: New test.
From-SVN: r257141
* include/std/optional (_Optional_payload): Fix the comment in
the class head and turn into a primary and one specialization.
(_Optional_payload::_M_engaged): Strike the NSDMI.
(_Optional_payload<_Tp, false>::operator=(const _Optional_payload&)):
New.
(_Optional_payload<_Tp, false>::operator=(_Optional_payload&&)):
Likewise.
(_Optional_payload<_Tp, false>::_M_get): Likewise.
(_Optional_payload<_Tp, false>::_M_reset): Likewise.
(_Optional_base_impl): Likewise.
(_Optional_base): Turn into a primary and three specializations.
(optional(nullopt)): Change the base init.
* testsuite/20_util/optional/assignment/8.cc: New.
* testsuite/20_util/optional/cons/trivial.cc: Likewise.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust.
From-SVN: r256694
Jonathan Wakely