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
Move duplicated code to new _S_string_from_iter function and fix
constraints to accept iterators with const value type.
* include/bits/fs_path.h (path::__is_encoded_char): Change from class
template to alias template.
(path::__value_type_is_char): Use remove_const_t.
(path:_S_string_from_iter): New helper function.
(path::_S_convert(InputIter, __null_terminated))
(path::_S_convert_loc(InputIter, __null_terminated, const locale&)):
Use _S_string_from_iter.
(path::string<_CharT, _Allocator>(const _Allocator&)): Allow sharing
rep for COW strings.
* include/experimental/bits/fs_path.h (path::__is_encoded_char):
Change from class template to alias template.
(path::__value_type_is_char): Use remove_const.
(path:_S_string_from_iter): New helper function.
(path::_S_convert(InputIter, __null_terminated))
(path::_S_convert_loc(InputIter, __null_terminated, const locale&)):
Use _S_string_from_iter.
* testsuite/27_io/filesystem/path/append/source.cc: Test appending
wide strings.
* testsuite/27_io/filesystem/path/concat/strings.cc: Check for exact
string equality, not path equivalence.
* testsuite/27_io/filesystem/path/construct/format.cc: Check
construction from std::string and std::wstring and input iterators.
* testsuite/27_io/filesystem/path/construct/locale.cc: Check
construction from iterators.
* testsuite/experimental/filesystem/path/concat/strings.cc: Check for
exact string equality, not path equivalence.
* testsuite/experimental/filesystem/path/construct/locale.cc: Check
construction from iterators.
From-SVN: r260628
The C++17 std::filesystem::path grammar allows an empty filename as the
last component (to signify a trailing slash). The existing code does not
handle this consistently, sometimes an empty filename has type _Multi
and sometimes it has type _Filename. This can result in a non-empty
iterator range for an empty filename component.
This change ensures that empty paths always have type _Filename and will
yield an empty iterator range.
* include/bits/fs_path.h (path::_M_type): Change default member
initializer to _Filename.
(path::begin): Create past-the-end iterator for empty path.
* src/filesystem/std-path.cc (path::remove_filename()): Remove
debugging check.
(path::has_relative_path()): Return false for empty filenames.
(path::_M_split_cmpts): Set _M_type to _Filename for empty paths.
Fix offset of empty final component.
* testsuite/27_io/filesystem/path/itr/components.cc: New.
* testsuite/27_io/filesystem/path/itr/traversal.cc: Add new inputs.
From-SVN: r260616
* src/filesystem/std-ops.cc (absolute): Report an error for empty
paths.
(weakly_canonical(const path&)): Do not call canonical on empty path.
(weakly_canonical(const path&, error_code&)): Likewise.
* testsuite/27_io/filesystem/operations/absolute.cc: Check for errors.
From-SVN: r260441
* src/c++11/codecvt.cc (__codecvt_utf8_base<wchar_t>::do_in)
[__SIZEOF_WCHAR_T__==2 && __BYTE_ORDER__!=__ORDER_BIG_ENDIAN__]: Set
little_endian element in bitmask.
* testsuite/22_locale/codecvt/codecvt_utf8/69703.cc: Run all tests.
* testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: New.
From-SVN: r260389
In C++11 and C++14 any odr-use of these constants requires a definition
at namespace-scope. In C++17 they are implicitly inline and so the
namespace-scope redeclarations are redundant (and allowing them is
deprecated).
PR libstdc++/85098
* include/bits/regex.h [__cplusplus < 201703L] (basic_regex::icase)
(basic_regex::nosubs, basic_regex::optimize, basic_regex::collate)
(basic_regex::ECMAScript, basic_regex::basic, basic_regex::extended)
(basic_regex::awk, basic_regex::grep, basic_regex::egrep): Add
definitions.
* include/bits/regex_automaton.h (_NFA::_M_insert_state): Adjust
whitespace.
* include/bits/regex_compiler.tcc (__INSERT_REGEX_MATCHER): Add
braces around body of do-while.
* testsuite/28_regex/basic_regex/85098.cc: New
From-SVN: r260371
Because path.cc is compiled with -std=gnu++17 the static constexpr
data member is implicitly 'inline' and so no definition gets emitted
unless it gets used in that translation unit. Other translation units
built as C++11 or C++14 still require a namespace-scope definition of
the variable, so mark the definition as used.
PR libstdc++/85818
* src/filesystem/path.cc (path::preferred_separator): Add used
attribute.
* testsuite/experimental/filesystem/path/preferred_separator.cc: New.
From-SVN: r260326
PR libstdc++/85812
* libsupc++/cxxabi_init_exception.h (__cxa_free_exception): Declare.
* libsupc++/exception_ptr.h (make_exception_ptr) [__cpp_exceptions]:
Refactor to separate non-throwing and throwing implementations.
[__cpp_rtti && !_GLIBCXX_HAVE_CDTOR_CALLABI]: Deallocate the memory
if constructing the object throws.
From-SVN: r260323
Constrain constructors and member functions of random number engines so
that functions taking seed sequences can only be called with types that
meet the seed sequence requirements.
PR libstdc++/85749
* include/bits/random.h (__detail::__is_seed_seq): New SFINAE helper.
(linear_congruential_engine, mersenne_twister_engine)
(subtract_with_carry_engine, discard_block_engine)
(independent_bits_engine, shuffle_order_engine): Use __is_seed_seq to
constrain function templates taking seed sequences.
* include/bits/random.tcc (linear_congruential_engine::seed(_Sseq&))
(mersenne_twister_engine::seed(_Sseq&))
(subtract_with_carry_engine::seed(_Sseq&)): Change return types to
match declarations.
* include/ext/random (simd_fast_mersenne_twister_engine): Use
__is_seed_seq to constrain function templates taking seed sequences.
* include/ext/random.tcc (simd_fast_mersenne_twister_engine::seed):
Change return type to match declaration.
* testsuite/26_numerics/random/discard_block_engine/cons/seed_seq2.cc:
New.
* testsuite/26_numerics/random/independent_bits_engine/cons/
seed_seq2.cc: New.
* testsuite/26_numerics/random/linear_congruential_engine/cons/
seed_seq2.cc: New.
* testsuite/26_numerics/random/mersenne_twister_engine/cons/
seed_seq2.cc: New.
* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.
* testsuite/26_numerics/random/shuffle_order_engine/cons/seed_seq2.cc:
New.
* testsuite/26_numerics/random/subtract_with_carry_engine/cons/
seed_seq2.cc: New.
* testsuite/ext/random/simd_fast_mersenne_twister_engine/cons/
seed_seq2.cc: New.
From-SVN: r260263
The correct definition seems to be has_root_directory() for all systems
we care about.
PR libstdc++/83891
* include/bits/fs_path.h (path::is_absolute()): Use same definition
for all operating systems.
* include/experimental/bits/fs_path.h (path::is_absolute()): Likewise.
* testsuite/27_io/filesystem/path/query/is_absolute.cc: New.
* testsuite/27_io/filesystem/path/query/is_relative.cc: Fix comment.
* testsuite/experimental/filesystem/path/query/is_absolute.cc: New.
From-SVN: r260259
The path::operator/=(const Source&) and path::append overloads were
still following the semantics of the Filesystem TS not C++17. Only
the path::operator/=(const path&) overload was correct.
This change adds more tests for path::operator/=(const path&) and adds
new tests to verify that the other append operations have equivalent
behaviour.
PR libstdc++/84159
* include/bits/fs_path.h (path::operator/=, path::append): Construct
temporary path before calling _M_append.
(path::_M_append): Change parameter to path and implement C++17
semantics.
* testsuite/27_io/filesystem/path/append/path.cc: Add helper function
and more examples from the standard.
* testsuite/27_io/filesystem/path/append/source.cc: New.
* testsuite/27_io/filesystem/path/decompose/filename.cc: Add comment.
* testsuite/27_io/filesystem/path/nonmember/append.cc: New.
From-SVN: r260255
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
PR libstdc++/82966
* include/bits/node_handle.h (_Node_handle_common::_M_swap): Use value
instead of type.
* testsuite/23_containers/set/modifiers/node_swap.cc: New.
From-SVN: r260226
* doc/xml/faq.xml: Link to C++17 status. Add note to outdated answer.
* doc/xml/manual/debug_mode.xml: Add array and forward_list to list
of C++11 containers with Debug Mode support.
* doc/xml/manual/using.xml: Document Dual ABI for ios_base::failure.
* doc/html/*: Regenerate.
From-SVN: r260129
To satisfy the CopyConstructible requirement a callable object stored in
a std::function must behave the same when copied from a const or
non-const source. If copying a non-const object doesn't produce an
equivalent copy then the behaviour is undefined. But we can make our
std::function more tolerant of such objects by ensuring we always copy
from a const lvalue.
Additionally use an if constexpr statement in the _M_get_pointer
function to avoid unnecessary instantiations in the discarded branch.
* include/bits/std_function.h (_Base_manager::_M_get_pointer):
Use constexpr if in C++17 mode.
(_Base_manager::_M_clone(_Any_data&, const _Any_data&, true_type)):
Copy from const object.
* testsuite/20_util/function/cons/non_copyconstructible.cc: New.
From-SVN: r260080
Restore the behaviour in GCC 8 and earlier where _GLIBCXX_USE_FLOAT128
is not defined when configure detects support is missing. This avoids
having three states where the macro is either 1, 0, or undefined.
PR libstdc++/85672
* include/Makefile.am [!ENABLE_FLOAT128]: Change c++config.h entry
to #undef _GLIBCXX_USE_FLOAT128 instead of defining it to zero.
* include/Makefile.in: Regenerate.
* include/bits/c++config (_GLIBCXX_USE_FLOAT128): Move definition
within conditional block.
From-SVN: r260043
By performing the /= operation on a named local variable instead of a
temporary the copy made for the return value can be elided.
PR libstdc++/85671
* include/bits/fs_path.h (operator/): Permit copy elision.
* include/experimental/bits/fs_path.h (operator/): Likewise.
From-SVN: r260009
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
Actually put the file in.
Don't know what my problem is today...
From-SVN: r260008
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
From-SVN: r260004
2018-05-07 Edward Smith-Rowland <3dw4rd@verizon.net>
Moar PR libstdc++/80506
* include/bits/random.tcc (gamma_distribution::__generate_impl()):
Fix magic number used in loop condition.
From-SVN: r260001
