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74d14778e7
This adds std::__is_constant_evaluated() as a C++11 wrapper for __builtin_is_constant_evaluated, but just returning false if the built-in isn't supported by the compiler. This allows us to use it throughout the library without checking __has_builtin every time. Some uses in std::vector and std::string can only be constexpr when the std::is_constant_evaluated() function actually works, so we might as well guard them with a relevant macro and call that function directly, rather than the built-in or std::__is_constant_evaluated(). The remaining checks of the __cpp_lib_is_constant_evaluated macro could now be replaced by checking __cplusplus >= 202002 instead, but there's no practical difference. We still need some kind of preprocessor check there anyway. libstdc++-v3/ChangeLog: * doc/doxygen/user.cfg.in (PREDEFINED): Change macro name. * include/bits/allocator.h (allocate, deallocate): Use std::__is_constant_evaluated() unconditionally, instead of checking whether std::is_constant_evaluated() (or the built-in) can be used. * include/bits/basic_string.h: Check new macro. call std::is_constant_evaluated() directly in C++20-only code that is guarded by a suitable macro. * include/bits/basic_string.tcc: Likewise. * include/bits/c++config (__is_constant_evaluated): Define. (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Replace with ... (_GLIBCXX_HAVE_IS_CONSTANT_EVALUATED): New macro. * include/bits/char_traits.h (char_traits): Replace conditional calls to std::is_constant_evaluated with unconditional calls to std::__is_constant_evaluated. * include/bits/cow_string.h: Use new macro. * include/bits/ranges_algobase.h (__copy_or_move): Replace conditional calls to std::is_constant_evaluated with unconditional calls to std::__is_constant_evaluated. (__copy_or_move_backward, __fill_n_fn): Likewise. * include/bits/ranges_cmp.h (ranges::less): Likewise. * include/bits/stl_algobase.h (lexicographical_compare_three_way): Likewise. * include/bits/stl_bvector.h: Call std::is_constant_evaluated directly in C++20-only code that is guarded by a suitable macro. * include/bits/stl_construct.h (_Construct, _Destroy, _Destroy_n): Replace is_constant_evaluated with __is_constant_evaluated. * include/bits/stl_function.h (greater, less, greater_equal) (less_equal): Replace __builtin_is_constant_evaluated and __builtin_constant_p with __is_constant_evaluated. * include/bits/stl_vector.h: Call std::is_constant_evaluated() in C++20-only code. * include/debug/helper_functions.h (__check_singular): Use __is_constant_evaluated instead of built-in, or remove check entirely. * include/std/array (operator<=>): Use __is_constant_evaluated unconditionally. * include/std/bit (__bit_ceil): Likewise. * include/std/type_traits (is_constant_evaluated): Define using 'if consteval' if possible. * include/std/version: Use new macro. * libsupc++/compare: Use __is_constant_evaluated instead of __builtin_is_constant_evaluated. * testsuite/23_containers/array/tuple_interface/get_neg.cc: Adjust dg-error lines. |
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| .. | ||
| array_type_info.cc | ||
| atexit_arm.cc | ||
| atexit_thread.cc | ||
| atomic_lockfree_defines.h | ||
| bad_alloc.cc | ||
| bad_array_length.cc | ||
| bad_array_new.cc | ||
| bad_cast.cc | ||
| bad_typeid.cc | ||
| class_type_info.cc | ||
| compare | ||
| cxxabi_forced.h | ||
| cxxabi_init_exception.h | ||
| cxxabi.h | ||
| del_op.cc | ||
| del_opa.cc | ||
| del_opant.cc | ||
| del_opnt.cc | ||
| del_ops.cc | ||
| del_opsa.cc | ||
| del_opv.cc | ||
| del_opva.cc | ||
| del_opvant.cc | ||
| del_opvnt.cc | ||
| del_opvs.cc | ||
| del_opvsa.cc | ||
| dyncast.cc | ||
| eh_alloc.cc | ||
| eh_arm.cc | ||
| eh_atomics.h | ||
| eh_aux_runtime.cc | ||
| eh_call.cc | ||
| eh_catch.cc | ||
| eh_exception.cc | ||
| eh_globals.cc | ||
| eh_personality.cc | ||
| eh_ptr.cc | ||
| eh_term_handler.cc | ||
| eh_term_handler.h | ||
| eh_terminate.cc | ||
| eh_throw.cc | ||
| eh_tm.cc | ||
| eh_type.cc | ||
| eh_unex_handler.cc | ||
| enum_type_info.cc | ||
| exception | ||
| exception_defines.h | ||
| exception_ptr.h | ||
| exception.h | ||
| function_type_info.cc | ||
| fundamental_type_info.cc | ||
| guard_error.cc | ||
| guard.cc | ||
| hash_bytes.cc | ||
| hash_bytes.h | ||
| initializer_list | ||
| Makefile.am | ||
| Makefile.in | ||
| nested_exception.cc | ||
| nested_exception.h | ||
| new | ||
| new_handler.cc | ||
| new_op.cc | ||
| new_opa.cc | ||
| new_opant.cc | ||
| new_opnt.cc | ||
| new_opv.cc | ||
| new_opva.cc | ||
| new_opvant.cc | ||
| new_opvnt.cc | ||
| pbase_type_info.cc | ||
| pmem_type_info.cc | ||
| pointer_type_info.cc | ||
| pure.cc | ||
| si_class_type_info.cc | ||
| tinfo2.cc | ||
| tinfo.cc | ||
| tinfo.h | ||
| typeinfo | ||
| unwind-cxx.h | ||
| vec.cc | ||
| vmi_class_type_info.cc | ||
| vterminate.cc | ||
| vtv_stubs.cc | ||