This change ensures that std::common_type<> is a complete type (LWG
2408), and that std::common_type<T>, std::common_type<cv T1, cv T2>, and
std::common_type<T1, T2, R...> will use program-defined specializations
for std::common_type<T1, T2> (LWG 2465).
The implementation of common_type<T1, T2, R...> is changed to use
void_t, and the specializations for duration and time_point are modified
to also use void_t instead of depending on implementation details of
common_type.
PR libstdc++/89102
* doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
* include/std/chrono (__duration_common_type_wrapper): Replace with ...
(__duration_common_type): New helper.
(common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
__duration_common_type.
(__timepoint_common_type_wrapper): Replace with ...
(__timepoint_common_type): New helper.
(common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
Use __time_point_common_type.
* include/std/type_traits (common_type<>): Define, as per LWG 2408.
(__common_type_impl): If either argument is transformed by decay,
use the common_type of the decayed types.
(__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
decayed, use __do_common_type_impl to get the common_type.
(common_type<_Tp>): Use common_type<_Tp, _Tp>.
(__do_member_type_wrapper, __member_type_wrapper)
(__expanded_common_type_wrapper): Remove.
(__common_type_pack, __common_type_fold): New helpers.
(common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
__member_type_wrapper and __expanded_common_type_wrapper.
* testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
Test zero-length template argument list.
* testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
Test single argument cases and argument types that should decay.
* testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
Adjust expected error.
* testsuite/20_util/duration/literals/range_neg.cc: Use zero for
dg-error lineno.
* testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
* testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
* testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.
From-SVN: r270987
2019-05-01 Nina Dinka Ranns <dinka.ranns@gmail.com>
Make allocator propagation more consistent for
operator+(basic_string) (P1165R1)
* include/bits/basic_string.h
(operator+(basic_string&&, basic_string&&): Changed resulting
allocator to always be the one from the first parameter.
* include/bits/basic_string.tcc
(operator+(const _CharT*, const basic_string&)): Changed
resulting allocator to be SOCCC on the second parameter's allocator.
(operator+(_CharT, const basic_string&)): Likewise.
* testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
New.
* testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
New.
From-SVN: r270953
2019-05-06 François Dumont <fdumont@gcc.gnu.org>
* python/libstdcxx/v6/printers.py (add_one_template_type_printer):
Add type printer for container types in std::__debug namespace.
* testsuite/lib/gdb-test.exp (whatis-regexp-test): New.
(gdb-tests): Use distinct parameters for the type of test and use of
regex.
(gdb-test): Check for regex test even if 'whatis' test.
* testsuite/libstdc++-prettyprinters/80276.cc: Adapt for _GLIBCXX_DEBUG
mode.
* testsuite/libstdc++-prettyprinters/cxx11.cc: Likewise.
* testsuite/libstdc++-prettyprinters/cxx17.cc: Likewise.
* testsuite/libstdc++-prettyprinters/libfundts.cc: Likewise.
* testsuite/libstdc++-prettyprinters/simple.cc: Likewise.
* testsuite/libstdc++-prettyprinters/simple11.cc: Likewise.
* testsuite/libstdc++-prettyprinters/whatis.cc: Likewise.
* testsuite/libstdc++-prettyprinters/whatis2.cc: Likewise.
From-SVN: r270893
In this implementation it is an error to pass the empty path to absolute,
because the empty path doesn't represent any file in the filesystem so
the function cannot meet its postcondition.
Currently the absolute(const path&, error_code&) overload reports an
error for the empty path, but using errc::no_such_file_or_directory, and
the other overload does not report an error. This patch makes them
consistntly report an errc::invalid_argument error for the empty path.
PR libstdc++/90299
* src/c++17/fs_ops.cc (absolute(const path&)): Report an error if the
argument is an empty path.
(absolute(const path&, error_code&)): Use invalid_argument as error
code instead of no_such_file_or_directory.
* testsuite/27_io/filesystem/operations/absolute.cc: Check handling
of non-existent paths and empty paths with both overloads of absolute.
From-SVN: r270874
The hash value should be based on the identity (i.e. address) of the
error_category member, not its object representation (i.e. underlying
bytes).
* include/std/system_error (error_code): Remove friend declaration
for hash<error_code>.
(hash<error_code>::operator()): Use public member functions to access
value and category.
(hash<error_condition>::operator()): Use address of category, not
its object representation.
* src/c++11/compatibility-c++0x.cc (hash<error_code>::operator()):
Use public member functions to access value and category.
* testsuite/19_diagnostics/error_condition/hash.cc: New test.
From-SVN: r270872
2019-05-04 François Dumont <fdumont@gcc.gnu.org>
* include/bits/hashtable.h (_Hashtable<>::rehash): Review comment.
* include/bits/hashtable_policy.h
(_Prime_rehash_policy::_M_bkt_for_elements): Use __builtin_ceill.
(_Power2_rehash_policy::_M_bkt_for_elements): Likewise.
(_Power2_rehash_policy::_M_next_bkt): Enforce returning a result not
smaller than input value rather than always greater. Preserve
_M_next_resize if called with 0 input. Use __builtin_floorl.
(_Power2_rehash_policy::_M_need_rehash): Rehash only if number of
elements + number of insertions is greater than _M_next_resize. Start
with 11 buckets if not told otherwise. Use __builtin_floorl.
(_Rehash_base<>::reserve): Use rehash policy _M_bkt_for_elements.
* src/c++11/hashtable_c++0x.cc (_Prime_rehash_policy::_M_next_bkt):
Preserve _M_next_resize if called with 0 input. Use __builtin_floorl.
(_Prime_rehash_policy::_M_need_rehash): Start with 11 buckets if not
told otherwise. Use __builtin_floorl.
* testsuite/23_containers/unordered_set/hash_policy/71181.cc: Adapt test
to also validate _Power2_rehash_policy.
* testsuite/23_containers/unordered_set/hash_policy/power2_rehash.cc:
Adapt.
From-SVN: r270868
This is the same fix as was done for std::numeric_limits in r183905.
PR libstdc++/52119
* include/ext/numeric_traits.h (__glibcxx_min): Avoid integer
overflow warning with -Wpedantic -Wsystem-headers.
From-SVN: r270858
In order to use the _GLIBCXX_NOEXCEPT_IF macro for an expression
containing commas I enclosed it in parentheses, so the preprocessor
wouldn't treat it as two arguments to the function-like macro. Clang
gives an error because now the noexcept-specifier noexcept((C)) is not
equivalent to the noexcept(C) one on the declaration of swap in
<type_traits>.
Instead of requiring extra parentheses around the expression, redefine
_GLIBCXX_NOEXCEPT_IF as a variadic macro (even though supporting that in
C++98 is a GNU extension).
PR libstdc++/90314
* include/bits/c++config (_GLIBCXX_NOEXCEPT_IF): Use variadic macro.
* include/bits/move.h (swap): Remove extra parentheses.
From-SVN: r270827
The std::__addressof function is always constexpr, even in C++14, so we
can just use that.
* include/experimental/bits/lfts_config.h: Improve doc markup.
* include/experimental/optional: Improve docs.
(_Has_addressof_mem, _Has_addressof_free, _Has_addressof)
(__constexpr_addressof): Remove.
(optional::operator->()): Use std::__addressof().
* include/std/optional (optional::operator->()): Adjust whitespace.
* testsuite/experimental/optional/constexpr/observers/2.cc: Check
that operator-> is still constexpr with overloaded operator&. Change
to compile-only test.
* testsuite/experimental/optional/constexpr/observers/3.cc: Change to
compile-only test.
From-SVN: r270826
This prevents "Mathematical Special Functions" appearing in the
top-level menu of the generated HTML docs, and adds "TR1" to the title
for the TR1 docs, to avoid duplicate titles.
* include/bits/specfun.h: Improve docs.
* include/tr1/cmath: Likewise. Fix nesting of preprocessor conditions
and namespaces.
From-SVN: r270806
Several of the pb_ds headers are intended to be included multiple times,
within the definition of various class templates. The including files
define macros like PB_DS_CLASS_C_DEC and PB_DS_GEN_POS before including
these headers.
In some cases the types defined in the headers are actually nested types
within other classes, and so should not have been documented as though
they are declared in the global namespace, as in:
https://gcc.gnu.org/onlinedocs/gcc-8.3.0/libstdc++/api/a12028.html
In other cases the headers provide inline member function definitions,
but when processed by Doxygen the class name "PB_DS_CLASS_C_DEC" is not
recognised.
This patch makes Doxygen ignore definitions that only make sense when
included in the right context with the right macros defined.
* include/ext/pb_ds/detail/bin_search_tree_/*_imps.hpp: Do not define
anything unless PB_DS_CLASS_C_DEC is defined.
* include/ext/pb_ds/detail/binary_heap_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/binomial_heap_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/binomial_heap_base_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/cc_hash_table_map_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/gp_hash_table_map_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/hash_fn/*_imp.hpp: Likewise.
* include/ext/pb_ds/detail/left_child_next_sibling_heap_/*_imps.hpp:
Likewise.
* include/ext/pb_ds/detail/list_update_map_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/ov_tree_map_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/pairing_heap_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/pat_trie_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/rb_tree_map_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/rc_binomial_heap_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/resize_policy*_imp.hpp: Likewise.
* include/ext/pb_ds/detail/splay_tree_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/thin_heap_/*_imps.hpp: Likewise.
* include/ext/pb_ds/detail/trie_policy*_imp.hpp: Likewise.
* include/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp:
Likewise.
* include/ext/pb_ds/detail/unordered_iterator/iterator.hpp: Likewise.
* include/ext/pb_ds/detail/unordered_iterator/point_const_iterator.hpp:
Likewise.
* include/ext/pb_ds/detail/unordered_iterator/point_iterator.hpp:
Likewise.
From-SVN: r270803
The GROUP_NESTED_COMPOUNDS option means that types nested inside inline
namespaces or other classes will be automatically added to a Doxygen
group, e.g. this actually works as intended:
/**
* @defgroup chrono Time
* @ingroup utilities
*
* Classes and functions for time.
* @{
*/
namespace chrono
{
template<typename _Rep, typename _Period = ratio<1>>
struct duration;
template<typename _Clock, typename _Dur = typename _Clock::duration>
struct time_point;
}
/// @}
Currently chrono::duration and chrono::time_point are not added to the
"chrono" group. They would need an explicit @ingroup tag added to them
individually. With GROUP_NESTED_COMPOUNDS=YES they get added to the
enclosing group.
The SORT_BY_SCOPE_NAME option means that the list of classes will sort
by class name, not the full qualified-id. Currently the alphabetical
Class List for classes beginning with 'c' looks like:
char_traits (__gnu_cxx)
character (__gnu_cxx)
condition_base (__gnu_cxx)
const_iterator_
condition_variable_any (std::_V2)
cauchy_distribution (std)
char_traits (std)
i.e. the list is sorted by the namespaces first, then the class names.
This is not helpful when you don't know which namespace a class might be
in, and inline namespaces with reserved names are not hidden (see
https://github.com/doxygen/doxygen/issues/5914 for a feature request to
allow that).
With SORT_BY_SCOPE_NAME=NO the list looks like:
cauchy_distribution (std)
char_traits (__gnu_cxx)
char_traits (std)
character (__gnu_cxx)
condition_base (__gnu_cxx)
condition_variable_any (std::_V2)
const_iterator_
This allows you to find a class by name more easily.
Also add PREDEFINED macros so that __attribute__ and various macros like
_GLIBCXX_NO_DISCARD, _GLIBCXX14_CONSTEXPR don't appear in the generated
docs.
* doc/doxygen/user.cfg.in: Regenerate with Doxygen 1.8.14 and set
GROUP_NESTED_COMPOUNDS=YES and SORT_BY_SCOPE_NAME=NO. Add various
_GLIBCXX_xxx macros and __attribute__(X) to PREDEFINED macros that
Doxygen expands.
From-SVN: r270802
The current generic implementation of __complex_proj used when cproj is
not available calculates the wrong projection, giving a different result
than given by C99's cproj.
When C99 cproj is not available but isinf and copysign are, use those to
give correct results for float, double and long double. Otherwise, and
for other specializations of std::complex, just use a generic version
that returns its argument, and so doesn't support infinities.
We might want to consider adding additional overloads of __complex_proj
to support extended types such as _Float64x, _Float128 etc.
PR libstdc++/61761
* include/std/complex (__complex_proj): Return parameter unchanged.
[_GLIBCXX_USE_C99_COMPLEX] (__complex_proj): Change overloads for
floating-point types to take std::complex arguments.
[_GLIBCXX_USE_C99_MATH_TR1] (__complex_proj): Add overloads for
floating-point types.
* testsuite/26_numerics/complex/proj.cc: New test.
From-SVN: r270759
The root_path.cc test had some debugging macros left in accidentally, so
didn't FAIL correctly if an assertion failed.
The string-char8_t.cc tests didn't compile on Windows.
* testsuite/27_io/filesystem/path/decompose/root_path.cc: Remove
macros accidentally left in.
* testsuite/27_io/filesystem/path/native/string-char8_t.cc: Remove
unnecessary -lstdc++fs option. Fix test for mingw.
* testsuite/experimental/filesystem/path/native/string-char8_t.cc:
Fix test for mingw.
From-SVN: r270685
We already added it to the std::vector primary template.
* include/bits/stl_bvector.h (vector<bool>::empty()): Add nodiscard
attribute.
From-SVN: r270648
This class template has been unused since __gnu_debug::__base was
removed in r263786.
* include/bits/stl_iterator_base_types.h (_Iter_base): Remove unused
class template and partial specialization.
From-SVN: r270647
The standard only requires that _Size can be converted to an integral
type, not that it can be used for arithmetic. Add a new set of
__size_to_integer helper functions to do the conversion (which will be
ambiguous if there is no one conversion that is better than any others).
Also add tests for DR 426 which requires these algorithms and search_n
to handle negative values of n.
PR libstdc++/87982
* include/bits/stl_algo.h (generate_n): Convert _Size parameter to
an integral type.
* include/bits/stl_algobase.h (__size_to_integer): New overloaded
functions to convert a value to an integral type.
(__fill_n_a, __fill_n_a): Assert that __n is already an integral type.
(fill_n): Convert _Size parameter to an integral type.
* testsuite/25_algorithms/fill_n/dr426.cc: New test.
* testsuite/25_algorithms/generate_n/87982.cc: New test.
* testsuite/25_algorithms/generate_n/dr426.cc: New test.
From-SVN: r270646
2019-04-27 Marc Glisse <marc.glisse@inria.fr>
PR libstdc++/87106
* include/bits/stl_uninitialized.h (__relocate_object_a): Mark the
arguments with __restrict.
From-SVN: r270624
François Dumont
Jonathan Wakely
Nina Dinka Ranns
Rainer Orth
Jakub Jelinek
Jonathan Wakely
Marc Glisse
H.J. Lu