| //===----------------------------------------------------------------------===// |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-format |
| |
| // <format> |
| |
| // [format.formatter.spec]: |
| // Each header that declares the template `formatter` provides the following |
| // enabled specializations: |
| // For each `charT`, for each cv-unqualified arithmetic type `ArithmeticT` |
| // other than char, wchar_t, char8_t, char16_t, or char32_t, a specialization |
| // template<> struct formatter<ArithmeticT, charT> |
| // |
| // This file tests with `ArithmeticT = unsigned integer`, for each valid `charT`. |
| // Where `unsigned integer` is one of: |
| // - unsigned char |
| // - unsigned short |
| // - unsigned |
| // - unsigned long |
| // - unsigned long long |
| // - __uint128_t |
| |
| #include <format> |
| #include <cassert> |
| #include <concepts> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| #include "make_string.h" |
| |
| #define STR(S) MAKE_STRING(CharT, S) |
| |
| template <class StringT, class StringViewT, class ArithmeticT> |
| void test(StringT expected, StringViewT fmt, ArithmeticT arg) { |
| using CharT = typename StringT::value_type; |
| auto parse_ctx = std::basic_format_parse_context<CharT>(fmt); |
| std::formatter<ArithmeticT, CharT> formatter; |
| static_assert(std::semiregular<decltype(formatter)>); |
| |
| auto it = formatter.parse(parse_ctx); |
| assert(it == fmt.end() - (!fmt.empty() && fmt.back() == '}')); |
| |
| StringT result; |
| auto out = std::back_inserter(result); |
| using FormatCtxT = std::basic_format_context<decltype(out), CharT>; |
| |
| auto format_ctx = std::__format_context_create<decltype(out), CharT>( |
| out, std::make_format_args<FormatCtxT>(arg)); |
| formatter.format(arg, format_ctx); |
| assert(result == expected); |
| } |
| |
| template <class StringT, class ArithmeticT> |
| void test_termination_condition(StringT expected, StringT f, ArithmeticT arg) { |
| // The format-spec is valid if completely consumed or terminates at a '}'. |
| // The valid inputs all end with a '}'. The test is executed twice: |
| // - first with the terminating '}', |
| // - second consuming the entire input. |
| using CharT = typename StringT::value_type; |
| std::basic_string_view<CharT> fmt{f}; |
| assert(fmt.back() == CharT('}') && "Pre-condition failure"); |
| |
| test(expected, fmt, arg); |
| fmt.remove_suffix(1); |
| test(expected, fmt, arg); |
| } |
| |
| template <class ArithmeticT, class CharT> |
| void test_unsigned_integral_type() { |
| using A = ArithmeticT; |
| test_termination_condition(STR("0"), STR("}"), A(0)); |
| test_termination_condition(STR("255"), STR("}"), A(255)); |
| if (sizeof(A) > 1) |
| test_termination_condition(STR("65535"), STR("}"), A(65535)); |
| if (sizeof(A) > 2) |
| test_termination_condition(STR("4294967295"), STR("}"), A(4294967295)); |
| if (sizeof(A) > 4) |
| test_termination_condition(STR("8446744073709551615"), STR("}"), |
| A(8446744073709551615)); |
| |
| // TODO FMT Implement the __uint128_t maximum once the formatter can handle |
| // these values. |
| } |
| |
| template <class CharT> |
| void test_all_unsigned_integral_types() { |
| test_unsigned_integral_type<unsigned char, CharT>(); |
| test_unsigned_integral_type<unsigned short, CharT>(); |
| test_unsigned_integral_type<unsigned, CharT>(); |
| test_unsigned_integral_type<unsigned long, CharT>(); |
| test_unsigned_integral_type<unsigned long long, CharT>(); |
| #ifndef _LIBCPP_HAS_NO_INT128 |
| test_unsigned_integral_type<__uint128_t, CharT>(); |
| #endif |
| } |
| |
| int main(int, char**) { |
| test_all_unsigned_integral_types<char>(); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test_all_unsigned_integral_types<wchar_t>(); |
| #endif |
| |
| return 0; |
| } |