2b8b48c5a0
[format.formatter.spec]/5 lists the requirements for the default formatter. The original implementation didn't implement this. This implements the default formatter according to the Standard. This adds additional test to validate the default formatter is disabled and the required standard formatters are enabled. While adding the tests it seems the formatters needed a constraint for the character types they were valid for. Implements parts of: - P0645 Text Formatting Depends on D115988 Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D115989
171 lines
6.0 KiB
C++
171 lines
6.0 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___FORMAT_FORMATTER_INTEGER_H
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#define _LIBCPP___FORMAT_FORMATTER_INTEGER_H
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#include <__availability>
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#include <__config>
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#include <__format/format_error.h>
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#include <__format/format_fwd.h>
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#include <__format/formatter.h>
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#include <__format/formatter_integral.h>
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#include <__format/parser_std_format_spec.h>
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#include <limits>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 17
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// TODO FMT Remove this once we require compilers with proper C++20 support.
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// If the compiler has no concepts support, the format header will be disabled.
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// Without concepts support enable_if needs to be used and that too much effort
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// to support compilers with partial C++20 support.
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#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
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namespace __format_spec {
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template <class _CharT>
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class _LIBCPP_TEMPLATE_VIS __parser_integer : public __parser_integral<_CharT> {
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public:
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_LIBCPP_HIDE_FROM_ABI constexpr auto parse(auto& __parse_ctx)
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-> decltype(__parse_ctx.begin()) {
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auto __it = __parser_integral<_CharT>::__parse(__parse_ctx);
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switch (this->__type) {
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case _Flags::_Type::__default:
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this->__type = _Flags::_Type::__decimal;
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[[fallthrough]];
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case _Flags::_Type::__binary_lower_case:
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case _Flags::_Type::__binary_upper_case:
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case _Flags::_Type::__octal:
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case _Flags::_Type::__decimal:
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case _Flags::_Type::__hexadecimal_lower_case:
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case _Flags::_Type::__hexadecimal_upper_case:
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this->__handle_integer();
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break;
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case _Flags::_Type::__char:
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this->__handle_char();
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break;
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default:
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__throw_format_error("The format-spec type has a type not supported for "
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"an integer argument");
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}
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return __it;
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}
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};
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template <class _CharT>
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using __formatter_integer = __formatter_integral<__parser_integer<_CharT>>;
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} // namespace __format_spec
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// [format.formatter.spec]/2.3
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// For each charT, for each cv-unqualified arithmetic type ArithmeticT other
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// than char, wchar_t, char8_t, char16_t, or char32_t, a specialization
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// Signed integral types.
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<signed char, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<short, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<int, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<long, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<long long, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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#ifndef _LIBCPP_HAS_NO_INT128
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<__int128_t, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {
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using _Base = __format_spec::__formatter_integer<_CharT>;
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_LIBCPP_HIDE_FROM_ABI auto format(__int128_t __value, auto& __ctx)
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-> decltype(__ctx.out()) {
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// TODO FMT Implement full 128 bit support.
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using _To = long long;
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if (__value < numeric_limits<_To>::min() ||
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__value > numeric_limits<_To>::max())
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__throw_format_error("128-bit value is outside of implemented range");
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return _Base::format(static_cast<_To>(__value), __ctx);
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}
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};
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#endif
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// Unsigned integral types.
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<unsigned char, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<unsigned short, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<unsigned, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<unsigned long, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<unsigned long long, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {};
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#ifndef _LIBCPP_HAS_NO_INT128
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<__uint128_t, _CharT>
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: public __format_spec::__formatter_integer<_CharT> {
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using _Base = __format_spec::__formatter_integer<_CharT>;
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_LIBCPP_HIDE_FROM_ABI auto format(__uint128_t __value, auto& __ctx)
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-> decltype(__ctx.out()) {
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// TODO FMT Implement full 128 bit support.
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using _To = unsigned long long;
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if (__value < numeric_limits<_To>::min() ||
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__value > numeric_limits<_To>::max())
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__throw_format_error("128-bit value is outside of implemented range");
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return _Base::format(static_cast<_To>(__value), __ctx);
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}
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};
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#endif
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#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
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#endif //_LIBCPP_STD_VER > 17
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___FORMAT_FORMATTER_INTEGER_H
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