llvm-project
b9a2658a - [libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

Commit

202 days ago

[libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002) This patch implements the forwarding to frozen C++03 headers as discussed in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the RFC, we initially proposed selecting the right headers from the Clang driver, however consensus seemed to steer towards handling this in the library itself. This patch implements that direction. At a high level, the changes basically amount to making each public header look like this: ``` // inside <vector> #ifdef _LIBCPP_CXX03_LANG # include <__cxx03/vector> #else // normal <vector> content #endif ``` In most cases, public headers are simple umbrella headers so there isn't much code in the #else branch. In other cases, the #else branch contains the actual implementation of the header.

References

#109002 - [libc++][C++03] Use `__cxx03/` headers in C++03 mode

Author

philnik777

Parents

c361fd5a

Files247

.github/workflows
- libcxx-build-and-test.yaml
libcxx
- cmake/caches
  - Generic-cxx03-frozen.cmake
- include
  - CMakeLists.txt
  - __cxx03
    - CMakeLists.txt
    - __config
    - __configuration
      - abi.h
      - compiler.h
      - config_site_shim.h
      - language.h
      - platform.h
    - __locale_dir/locale_base_api
      - bsd_locale_fallbacks.h
    - __thread/support
      - pthread.h
    - climits
    - locale
    - module.modulemap
    - version
  - algorithm
  - any
  - array
  - atomic
  - barrier
  - bit
  - bitset
  - cassert
  - ccomplex
  - cctype
  - cerrno
  - cfenv
  - cfloat
  - charconv
  - chrono
  - cinttypes
  - ciso646
  - climits
  - clocale
  - cmath
  - codecvt
  - compare
  - complex
  - complex.h
  - concepts
  - condition_variable
  - coroutine
  - csetjmp
  - csignal
  - cstdalign
  - cstdarg
  - cstdbool
  - cstddef
  - cstdint
  - cstdio
  - cstdlib
  - cstring
  - ctgmath
  - ctime
  - ctype.h
  - cuchar
  - cwchar
  - cwctype
  - deque
  - errno.h
  - exception
  - execution
  - expected
  - experimental
    - iterator
    - memory
    - propagate_const
    - simd
    - type_traits
    - utility
  - ext
    - hash_map
    - hash_set
  - fenv.h
  - filesystem
  - flat_map
  - float.h
  - format
  - forward_list
  - fstream
  - functional
  - future
  - initializer_list
  - inttypes.h
  - iomanip
  - ios
  - iosfwd
  - iostream
  - istream
  - iterator
  - latch
  - limits
  - list
  - locale
  - map
  - math.h
  - mdspan
  - memory
  - memory_resource
  - mutex
  - new
  - numbers
  - numeric
  - optional
  - ostream
  - print
  - queue
  - random
  - ranges
  - ratio
  - regex
  - scoped_allocator
  - semaphore
  - set
  - shared_mutex
  - source_location
  - span
  - sstream
  - stack
  - stdatomic.h
  - stdbool.h
  - stddef.h
  - stdexcept
  - stdio.h
  - stdlib.h
  - stop_token
  - streambuf
  - string
  - string.h
  - string_view
  - strstream
  - syncstream
  - system_error
  - tgmath.h
  - thread
  - tuple
  - type_traits
  - typeindex
  - typeinfo
  - uchar.h
  - unordered_map
  - unordered_set
  - utility
  - valarray
  - variant
  - vector
  - version
  - wchar.h
  - wctype.h
- test
  - libcxx
    - algorithms
      - half_positive.pass.cpp
    - assertions
      - customize_verbose_abort.link-time.pass.cpp
      - default_verbose_abort.pass.cpp
      - modes
        none.pass.cpp
      - single_expression.pass.cpp
    - atomics/atomics.syn
      - compatible_with_stdatomic.compile.pass.cpp
    - clang_modules_include.gen.py
    - containers
      - associative
        tree_balance_after_insert.pass.cpp
        tree_key_value_traits.pass.cpp
        tree_left_rotate.pass.cpp
        tree_remove.pass.cpp
        tree_right_rotate.pass.cpp
        unord.map
        abi.compile.pass.cpp
        unord.set
        abi.compile.pass.cpp
      - container_traits.compile.pass.cpp
      - unord
        key_value_traits.pass.cpp
        next_pow2.pass.cpp
        next_prime.pass.cpp
    - depr/depr.c.headers
      - extern_c.pass.cpp
    - header_inclusions.gen.py
    - input.output
      - file.streams/fstreams
        filebuf
        traits_mismatch.verify.cpp
        traits_mismatch.verify.cpp
      - iostream.format
        input.streams
        traits_mismatch.verify.cpp
        output.streams
        traits_mismatch.verify.cpp
      - string.streams
        stringbuf
        const_sso_buffer.pass.cpp
        traits_mismatch.verify.cpp
    - iterators
      - aliasing_iterator.pass.cpp
      - bounded_iter
        arithmetic.pass.cpp
        comparison.pass.cpp
        pointer_traits.pass.cpp
        types.compile.pass.cpp
      - contiguous_iterators.conv.compile.pass.cpp
      - contiguous_iterators.verify.cpp
      - iterator.primitives/iterator.operations
        prev.verify.cpp
    - language.support/support.dynamic
      - libcpp_deallocate.sh.cpp
    - lint
      - lint_cmakelists.sh.py
    - memory
      - allocation_guard.pass.cpp
      - swap_allocator.pass.cpp
    - numerics
      - bit.ops.pass.cpp
      - clamp_to_integral.pass.cpp
      - complex.number
        cmplx.over.pow.pass.cpp
    - selftest
      - test_macros.pass.cpp
    - strings/c.strings
      - constexpr_memmove.pass.cpp
    - transitive_includes.gen.py
    - type_traits
      - datasizeof.compile.pass.cpp
      - is_constant_evaluated.pass.cpp
      - is_trivially_comparable.compile.pass.cpp
      - is_trivially_relocatable.compile.pass.cpp
    - utilities
      - exception_guard.odr.sh.cpp
      - is_pointer_in_range.pass.cpp
      - is_valid_range.pass.cpp
      - meta
        meta_base.pass.cpp
      - no_destroy.pass.cpp
      - template.bitset
        includes.pass.cpp
      - utility
        private_constructor_tag.compile.pass.cpp
  - std
    - containers/sequences
      - array
        array.fill
        fill.verify.cpp
        array.swap
        swap.verify.cpp
        array.tuple
        get.verify.cpp
        tuple_element.verify.cpp
        size_and_alignment.compile.pass.cpp
      - forwardlist
        types.pass.cpp
      - list
        types.pass.cpp
      - vector/vector.cons
        exceptions.pass.cpp
    - input.output
      - file.streams/fstreams
        fstream.cons
        default.pass.cpp
        move.pass.cpp
        pointer.pass.cpp
        string.pass.cpp
        ifstream.cons
        default.pass.cpp
        move.pass.cpp
        pointer.pass.cpp
        string.pass.cpp
        ofstream.cons
        default.pass.cpp
        move.pass.cpp
        pointer.pass.cpp
        string.pass.cpp
      - iostreams.base/ios/basic.ios.members
        copyfmt.pass.cpp
      - string.streams
        istringstream/istringstream.cons
        default.pass.cpp
        move.pass.cpp
        string.pass.cpp
        ostringstream/ostringstream.cons
        default.pass.cpp
        move.pass.cpp
        string.pass.cpp
        stringbuf/stringbuf.cons
        default.pass.cpp
        stringstream/stringstream.cons
        default.pass.cpp
        move.pass.cpp
        string.pass.cpp
    - language.support/support.runtime
      - cstdalign.compile.pass.cpp
    - numerics/c.math
      - isnormal.pass.cpp
      - signbit.pass.cpp
    - re/re.iter/re.tokiter/re.tokiter.cnstr
      - init.pass.cpp
    - strings
      - basic.string
        char.bad.verify.cpp
      - string.view
        char.bad.verify.cpp
    - utilities/template.bitset/bitset.members
      - nonstdmem.uglified.compile.pass.cpp
  - support
    - test_macros.h
  - tools/clang_tidy_checks
    - proper_version_checks.cpp
- utils
  - ci
    - run-buildbot
  - generate_feature_test_macro_components.py
  - libcxx/test
    - params.py
- vendor/llvm
  - default_assertion_handler.in

llvm-project b9a2658a - [libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

llvm-project
b9a2658a - [libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)