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ed8b9eeeeeb98b3c34fc681d543f1ca582058f12
gcc/libstdc++-v3/include/bits
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Matthias Kretz ed8b9eeeee libstdc++: New _IotaArray utility to simplify index pack creation 
This patch introduces the internal helper type _IotaArray to simplify
defining a pack of indices via a structured binding declaration:
constexpr auto [...__is] = _IotaArray<N>;

_IotaArray is a C-array for lowest overhead in terms of template
instantiations. Non-GCC compilers that do not implement
__integer_pack have a slightly higher overhead.

libstdc++-v3/ChangeLog:

	* include/bits/utility.h (_IotaArray): Define.
	* testsuite/ext/iotaarray.cc: New test.

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
2025-10-27 11:48:49 +01:00
..
algorithmfwd.h
libstdc++: add constexpr stable_partition
2025-03-27 13:47:30 +01:00
align.h
libstdc++: Implement is_sufficiently_aligned [PR120994]
2025-08-21 11:54:41 +02:00
alloc_traits.h
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2025-01-02 11:59:57 +01:00
allocated_ptr.h
libstdc++: Define _Scoped_allocation RAII helper
2025-05-22 14:20:35 +02:00
allocator.h
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2025-01-02 11:59:57 +01:00
atomic_base.h
libstdc++: Fix typo in in __atomic_ref_base::_S_required_alignment.
2025-10-17 10:26:26 +02:00
atomic_futex.h
libstdc++: Fix unused parameter warnings in <bits/atomic_futex.h>
2025-01-10 21:06:21 +00:00
atomic_timed_wait.h
libstdc++: Add assertions to atomic waiting functions that need platform wait
2025-06-06 09:52:31 +01:00
atomic_wait.h
libstdc++: Add assertions to atomic waiting functions that need platform wait
2025-06-06 09:52:31 +01:00
basic_ios.h
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2025-01-02 11:59:57 +01:00
basic_ios.tcc
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2025-01-02 11:59:57 +01:00
basic_string.h
libstdc++: Fix -Wformat warning in std::string
2025-10-07 12:11:21 +01:00
basic_string.tcc
libstdc++: Fix std::string construction from volatile char* [PR119748]
2025-04-15 09:24:58 +01:00
binders.h
libstdc++: Reuse _Bind_back_t functor in ranges::_Partial
2025-09-04 15:30:00 +02:00
boost_concept_check.h
libstdc++: Disable -Wlong-long warnings in boost_concept_check.h
2025-05-29 11:49:03 +01:00
c++0x_warning.h
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2025-01-02 11:59:57 +01:00
c++config
libstdc++: Implement P0849R8 auto(x) library changes
2025-06-04 14:55:40 -04:00
char_traits.h
libstdc++: Use constexpr-if for C++11 and C++14
2025-04-29 10:52:59 +01:00
charconv.h
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2025-01-02 11:59:57 +01:00
chrono_io.h
libstdc++: Adjust enable_nonlocking_formatter_optimization specializations [PR121790]
2025-10-10 09:23:01 +02:00
chrono.h
libstdc++: Fix missing __to_timeout_timespec for targets using POSIX sleep [PR122293]
2025-10-15 21:54:56 +01:00
codecvt.h
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concept_check.h
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cow_string.h
libstdc++: Fix std::string construction from volatile char* [PR119748]
2025-04-15 09:24:58 +01:00
cpp_type_traits.h
libstdc++: Always treat __float128 as a floating-point type
2025-07-11 08:34:17 +01:00
cpyfunc_impl.h
libstdc++: Pass small trivial types by value in polymorphic wrappers
2025-06-02 13:52:35 +02:00
deque.tcc
libstdc++: Fix some -Wsign-compare warnings in headers
2025-09-27 21:18:42 +01:00
elements_of.h
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2025-01-02 11:59:57 +01:00
enable_special_members.h
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erase_if.h
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2025-01-02 11:59:57 +01:00
formatfwd.h
libstdc++: Implement P3107R5 optimizations for std::print [PR121790]
2025-10-10 09:00:22 +02:00
forward_list.h
libstdc++: Define __cpp_lib_containers_ranges in appropriate headers [PR111055]
2025-04-11 13:56:03 +02:00
forward_list.tcc
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fs_dir.h
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fs_fwd.h
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fs_ops.h
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fs_path.h
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fstream.tcc
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funcref_impl.h
libstdc++: Pass small trivial types by value in polymorphic wrappers
2025-06-02 13:52:35 +02:00
functexcept.h
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2025-01-02 11:59:57 +01:00
functional_hash.h
libstdc++: Ensure std::hash<__int128> is defined [PR96710]
2025-07-15 10:25:34 +01:00
funcwrap.h
libstdc++: Deduce function_ref<M&() noexcept> from member object pointers.
2025-10-20 17:42:19 +02:00
gslice_array.h
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2025-01-02 11:59:57 +01:00
gslice.h
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2025-01-02 11:59:57 +01:00
hashtable_policy.h
libstdc++: [_Hashtable] Fix hash code cache usage when stateful hash functor
2025-02-25 22:27:14 +01:00
hashtable.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
indirect_array.h
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2025-01-02 11:59:57 +01:00
indirect.h
libstdc++: Fix allocator propagation and tests for std::indirect and std::polymorphic
2025-10-08 17:06:20 +01:00
invoke.h
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2025-01-02 11:59:57 +01:00
ios_base.h
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istream.tcc
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2025-01-02 11:59:57 +01:00
iterator_concepts.h
libstdc++: Use consteval for _S_noexcept() helper functions
2025-09-11 14:38:59 +01:00
list.tcc
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2025-01-02 11:59:57 +01:00
locale_classes.h
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2025-01-02 11:59:57 +01:00
locale_classes.tcc
libstdc++: Handle errors from strxfrm in std::collate::transform [PR85824]
2025-01-08 12:45:37 +00:00
locale_conv.h
libstdc++: Use constexpr-if for C++11 and C++14
2025-04-29 10:52:59 +01:00
locale_facets_nonio.h
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locale_facets_nonio.tcc
libstdc++: Fix "IEE" typo in comment in std::time_put::do_put
2025-03-19 23:29:06 +00:00
locale_facets.h
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locale_facets.tcc
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localefwd.h
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mask_array.h
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2025-01-02 11:59:57 +01:00
max_size_type.h
libstdc++: Treat __int128 as a real integral type [PR96710]
2025-07-11 08:34:13 +01:00
memory_resource.h
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memoryfwd.h
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mofunc_impl.h
libstdc++: Pass small trivial types by value in polymorphic wrappers
2025-06-02 13:52:35 +02:00
monostate.h
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2025-01-02 11:59:57 +01:00
move.h
libstdc++: Refactor bound arguments storage for bind_front/back
2025-08-26 18:16:04 +02:00
new_allocator.h
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2025-01-02 11:59:57 +01:00
node_handle.h
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ostream_insert.h
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ostream.h
libstdc++: Use constexpr-if for C++11 and C++14
2025-04-29 10:52:59 +01:00
ostream.tcc
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out_ptr.h
libstdc++: #ifdef out #pragma GCC system_header
2024-09-25 08:20:45 -04:00
parse_numbers.h
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2025-01-02 11:59:57 +01:00
postypes.h
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2025-01-02 11:59:57 +01:00
predefined_ops.h
libstdc++: Eliminate __gnu_cxx::__ops function objects
2025-09-26 11:05:49 +01:00
ptr_traits.h
libstdc++: Fix -Wmismatched-tags warnings for _Safe_iterator [PR120112]
2025-05-06 17:19:25 +01:00
quoted_string.h
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2025-01-02 11:59:57 +01:00
random.h
libstdc++: Fix -Wreorder warning in std::philox_engine
2025-10-07 12:11:21 +01:00
random.tcc
libstdc++: Fix unsafe comma operators in <random> [PR122062]
2025-09-26 11:01:08 +01:00
range_access.h
libstdc++: Add conditional noexcept to remaining range access functions
2025-02-15 10:58:56 +00:00
ranges_algo.h
libstdc++/ranges: Fix more wrong value type init from reference type [PR111861]
2025-09-17 14:14:37 -04:00
ranges_algobase.h
libstdc++: Add nodiscard attribute for ranges algorithm [PR121476]
2025-08-18 14:05:06 +02:00
ranges_base.h
libstdc++: Fix algorithms to use iterators' difference_type for arithmetic [PR121890]
2025-09-12 21:46:48 +01:00
ranges_cmp.h
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2025-01-02 11:59:57 +01:00
ranges_uninitialized.h
libstdc++: Ensure that ranges::destroy destroys in constexpr [PR121024]
2025-07-15 10:25:48 +01:00
ranges_util.h
libstdc++/ranges: Fix more wrong value type init from reference type [PR111861]
2025-09-17 14:14:37 -04:00
refwrap.h
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2025-01-02 11:59:57 +01:00
regex_automaton.h
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2025-01-02 11:59:57 +01:00
regex_automaton.tcc
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2025-01-02 11:59:57 +01:00
regex_compiler.h
libstdc++: Use constexpr-if to slightly simplify <regex>
2025-04-29 19:54:35 +01:00
regex_compiler.tcc
libstdc++: Use constexpr-if to slightly simplify <regex>
2025-04-29 19:54:35 +01:00
regex_constants.h
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regex_error.h
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2025-01-02 11:59:57 +01:00
regex_executor.h
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2025-01-02 11:59:57 +01:00
regex_executor.tcc
libstdc++: Use constexpr-if to slightly simplify <regex>
2025-04-29 19:54:35 +01:00
regex_scanner.h
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2025-01-02 11:59:57 +01:00
regex_scanner.tcc
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2025-01-02 11:59:57 +01:00
regex.h
libstdc++: Handle errors from strxfrm in std::collate::transform [PR85824]
2025-01-08 12:45:37 +00:00
regex.tcc
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2025-01-02 11:59:57 +01:00
requires_hosted.h
…
sat_arith.h
libstdc++: Fix -Wparentheses warning in std::mul_sat
2025-10-07 12:15:28 +01:00
semaphore_base.h
libstdc++: Use std::conditional_t instead of lambda to select semaphore implementation
2025-06-06 20:15:07 +01:00
shared_ptr_atomic.h
libstdc++: Make atomic<shared_ptr<T>>::wait sensitive to stored pointer only changes [PR118757]
2025-10-14 14:38:30 +02:00
shared_ptr_base.h
libstdc++: Fix warnings from std::make_unsigned<_Atomic_word> [PR122172]
2025-10-11 00:09:19 +01:00
shared_ptr.h
libstdc++: Add smart ptr owner_equals and owner_hash [PR117403]
2025-07-09 12:14:40 +01:00
slice_array.h
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2025-01-02 11:59:57 +01:00
specfun.h
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2025-01-02 11:59:57 +01:00
sstream.tcc
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2025-01-02 11:59:57 +01:00
std_abs.h
libstdc++: Support std::abs for 128-bit integers and floats [PR96710]
2025-05-27 12:11:43 +01:00
std_function.h
libstdc++: Use constexpr-if in std::function for C++11 and C++14
2025-04-29 10:52:59 +01:00
std_mutex.h
libstdc++: Avoid overflow in timeout conversions [PR113327]
2025-10-14 17:26:42 +01:00
std_thread.h
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2025-01-02 11:59:57 +01:00
stl_algo.h
libstdc++: Reuse predicates in std::search and std::is_permutation
2025-09-26 11:05:59 +01:00
stl_algobase.h
libstdc++: Reuse predicates in std::search and std::is_permutation
2025-09-26 11:05:59 +01:00
stl_bvector.h
libstdc++: Define __cpp_lib_containers_ranges in appropriate headers [PR111055]
2025-04-11 13:56:03 +02:00
stl_construct.h
libstdc++: Move start_lifetime_as functions to bits/stl_construct.h [PR106658]
2025-09-22 15:59:21 +02:00
stl_deque.h
libstdc++: fix element construction in std::deque::emplace [PR118087]
2025-09-23 16:38:28 +01:00
stl_function.h
libstdc++: Eliminate __gnu_cxx::__ops function objects
2025-09-26 11:05:49 +01:00
stl_heap.h
libstdc++: Eliminate __gnu_cxx::__ops function objects
2025-09-26 11:05:49 +01:00
stl_iterator_base_funcs.h
libstdc++: Avoid incrementing input iterators with std::prev [PR122224]
2025-10-22 14:48:04 +01:00
stl_iterator_base_types.h
libstdc++: Only define __any_input_iterator for C++20
2025-07-19 00:10:10 +01:00
stl_iterator.h
libstdc++: Fix attribute order on __normal_iterator friends [PR120949]
2025-07-07 21:50:51 +01:00
stl_list.h
libstdc++: Define __cpp_lib_containers_ranges in appropriate headers [PR111055]
2025-04-11 13:56:03 +02:00
stl_map.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
stl_multimap.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
stl_multiset.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
stl_numeric.h
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2025-01-02 11:59:57 +01:00
stl_pair.h
libstdc++: Fix std::get<T> for std::pair with reference members [PR121745]
2025-09-03 12:16:18 +01:00
stl_queue.h
libstdc++: Implement formatters for queue, priority_queue and stack [PR109162]
2025-04-25 13:02:04 +02:00
stl_raw_storage_iter.h
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2025-01-02 11:59:57 +01:00
stl_relops.h
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2025-01-02 11:59:57 +01:00
stl_set.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
stl_stack.h
libstdc++: Implement formatters for queue, priority_queue and stack [PR109162]
2025-04-25 13:02:04 +02:00
stl_tempbuf.h
libstdc++: do not use an unreserved name in _Temporary_buffer [PR119496]
2025-06-12 18:41:30 +02:00
stl_tree.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
stl_uninitialized.h
libstdc++: Suppress -Wclass-memaccess warnings in bits/stl_uninitialized.h
2025-10-01 13:54:59 +01:00
stl_vector.h
libstdc++: Do not require assignment for vector::resize(n, v) [PR90192]
2025-08-26 18:18:32 +02:00
stream_iterator.h
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streambuf_iterator.h
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streambuf.tcc
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string_view.tcc
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stringfwd.h
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2025-01-02 11:59:57 +01:00
text_encoding-data.h
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this_thread_sleep.h
libstdc++: Fix missing __to_timeout_timespec for targets using POSIX sleep [PR122293]
2025-10-15 21:54:56 +01:00
unicode-data.h
Update to Unicode 17.0.0
2025-10-08 18:02:39 +02:00
unicode.h
libstdc++: Fix reverse iteration in _Utf16_view
2025-10-13 11:04:28 +01:00
uniform_int_dist.h
libstdc++: Use constexpr-if for C++11 and C++14
2025-04-29 10:52:59 +01:00
unique_lock.h
libstdc++: Make std::unique_lock self-move-assignable
2025-03-06 16:46:19 +00:00
unique_ptr.h
libstdc++: Remove blank line from bits/unique_ptr.h
2025-09-10 23:24:10 +01:00
unordered_map.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
unordered_set.h
libstdc++: Test specific feature test macros instead of __cplusplus
2025-10-14 15:47:20 +01:00
uses_allocator_args.h
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2025-01-02 11:59:57 +01:00
uses_allocator.h
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2025-01-02 11:59:57 +01:00
utility.h
libstdc++: New _IotaArray utility to simplify index pack creation
2025-10-27 11:48:49 +01:00
valarray_after.h
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2025-01-02 11:59:57 +01:00
valarray_array.h
libstdc++: Make std::valarray support overaligned types [PR108951]
2025-10-27 09:54:55 +00:00
valarray_array.tcc
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valarray_before.h
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vector.tcc
libstdc++: Do not require assignment for vector::resize(n, v) [PR90192]
2025-08-26 18:18:32 +02:00
version.def
libstdc++: Implement optional<T&> from P2988R12 [PR121748]
2025-10-22 09:53:04 +02:00
version.h
libstdc++: Implement optional<T&> from P2988R12 [PR121748]
2025-10-22 09:53:04 +02:00
version.tpl
libstdc++: Tweak comment on generated #endif lines in bits/version.h
2025-10-09 15:25:59 +01:00