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//===----------------------------------------------------------------------===//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef TEST_STD_UTILITIES_FORMAT_FORMAT_TUPLE_FORMAT_TESTS_H
#define TEST_STD_UTILITIES_FORMAT_FORMAT_TUPLE_FORMAT_TESTS_H
#include <concepts>
#include <format>
#include "format.functions.common.h"
enum class color { black, red, gold };
template <class CharT>
struct std::formatter<color, CharT> : std::formatter<basic_string_view<CharT>, CharT> {
static constexpr basic_string_view<CharT> color_names[] = {SV("black"), SV("red"), SV("gold")};
auto format(color c, auto& ctx) const {
return formatter<basic_string_view<CharT>, CharT>::format(color_names[static_cast<int>(c)], ctx);
}
};
//
// Generic tests for a tuple and pair with two elements.
//
template <class CharT, class TestFunction, class ExceptionTest, class TupleOrPair>
void test_tuple_or_pair_int_int(TestFunction check, ExceptionTest check_exception, TupleOrPair&& input) {
check(SV("(42, 99)"), SV("{}"), input);
// *** align-fill & width ***
check(SV("(42, 99) "), SV("{:13}"), input);
check(SV("(42, 99)*****"), SV("{:*<13}"), input);
check(SV("__(42, 99)___"), SV("{:_^13}"), input);
check(SV("#####(42, 99)"), SV("{:#>13}"), input);
check(SV("(42, 99) "), SV("{:{}}"), input, 13);
check(SV("(42, 99)*****"), SV("{:*<{}}"), input, 13);
check(SV("__(42, 99)___"), SV("{:_^{}}"), input, 13);
check(SV("#####(42, 99)"), SV("{:#>{}}"), input, 13);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:}<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:{<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{::<}"), input);
// *** sign ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:-}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{:+}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{: }"), input);
// *** alternate form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:#}"), input);
// *** zero-padding ***
check_exception("A format-spec width field shouldn't have a leading zero", SV("{:0}"), input);
// *** precision ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:.}"), input);
// *** locale-specific form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:L}"), input);
// *** type ***
check(SV("__42: 99___"), SV("{:_^11m}"), input);
check(SV("__42, 99___"), SV("{:_^11n}"), input);
for (CharT c : SV("aAbBcdeEfFgGopsxX?")) {
check_exception("The format-spec should consume the input or end with a '}'",
std::basic_string_view{STR("{:") + c + STR("}")},
input);
}
}
template <class CharT, class TestFunction, class ExceptionTest, class TupleOrPair>
void test_tuple_or_pair_int_string(TestFunction check, ExceptionTest check_exception, TupleOrPair&& input) {
check(SV("(42, \"hello\")"), SV("{}"), input);
// *** align-fill & width ***
check(SV("(42, \"hello\") "), SV("{:18}"), input);
check(SV("(42, \"hello\")*****"), SV("{:*<18}"), input);
check(SV("__(42, \"hello\")___"), SV("{:_^18}"), input);
check(SV("#####(42, \"hello\")"), SV("{:#>18}"), input);
check(SV("(42, \"hello\") "), SV("{:{}}"), input, 18);
check(SV("(42, \"hello\")*****"), SV("{:*<{}}"), input, 18);
check(SV("__(42, \"hello\")___"), SV("{:_^{}}"), input, 18);
check(SV("#####(42, \"hello\")"), SV("{:#>{}}"), input, 18);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:}<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:{<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{::<}"), input);
// *** sign ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:-}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{:+}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{: }"), input);
// *** alternate form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:#}"), input);
// *** zero-padding ***
check_exception("A format-spec width field shouldn't have a leading zero", SV("{:0}"), input);
// *** precision ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:.}"), input);
// *** locale-specific form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:L}"), input);
// *** type ***
check(SV("__42: \"hello\"___"), SV("{:_^16m}"), input);
check(SV("__42, \"hello\"___"), SV("{:_^16n}"), input);
for (CharT c : SV("aAbBcdeEfFgGopsxX?")) {
check_exception("The format-spec should consume the input or end with a '}'",
std::basic_string_view{STR("{:") + c + STR("}")},
input);
}
}
template <class CharT, class TestFunction, class TupleOrPair>
void test_escaping(TestFunction check, TupleOrPair&& input) {
static_assert(std::same_as<std::remove_cvref_t<decltype(std::get<0>(input))>, CharT>);
static_assert(std::same_as<std::remove_cvref_t<decltype(std::get<1>(input))>, std::basic_string<CharT>>);
check(SV(R"(('*', ""))"), SV("{}"), input);
// Char
std::get<0>(input) = CharT('\t');
check(SV(R"(('\t', ""))"), SV("{}"), input);
std::get<0>(input) = CharT('\n');
check(SV(R"(('\n', ""))"), SV("{}"), input);
std::get<0>(input) = CharT('\0');
check(SV(R"(('\u{0}', ""))"), SV("{}"), input);
// String
std::get<0>(input) = CharT('*');
std::get<1>(input) = SV("hellö");
check(SV("('*', \"hellö\")"), SV("{}"), input);
}
//
// pair tests
//
template <class CharT, class TestFunction, class ExceptionTest>
void test_pair_int_int(TestFunction check, ExceptionTest check_exception) {
test_tuple_or_pair_int_int<CharT>(check, check_exception, std::make_pair(42, 99));
}
template <class CharT, class TestFunction, class ExceptionTest>
void test_pair_int_string(TestFunction check, ExceptionTest check_exception) {
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_pair(42, SV("hello")));
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_pair(42, STR("hello")));
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_pair(42, CSTR("hello")));
}
//
// tuple tests
//
template <class CharT, class TestFunction, class ExceptionTest>
void test_tuple_int(TestFunction check, ExceptionTest check_exception) {
auto input = std::make_tuple(42);
check(SV("(42)"), SV("{}"), input);
// *** align-fill & width ***
check(SV("(42) "), SV("{:9}"), input);
check(SV("(42)*****"), SV("{:*<9}"), input);
check(SV("__(42)___"), SV("{:_^9}"), input);
check(SV("#####(42)"), SV("{:#>9}"), input);
check(SV("(42) "), SV("{:{}}"), input, 9);
check(SV("(42)*****"), SV("{:*<{}}"), input, 9);
check(SV("__(42)___"), SV("{:_^{}}"), input, 9);
check(SV("#####(42)"), SV("{:#>{}}"), input, 9);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:}<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:{<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{::<}"), input);
// *** sign ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:-}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{:+}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{: }"), input);
// *** alternate form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:#}"), input);
// *** zero-padding ***
check_exception("A format-spec width field shouldn't have a leading zero", SV("{:0}"), input);
// *** precision ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:.}"), input);
// *** locale-specific form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:L}"), input);
// *** type ***
check_exception("The format specifier m requires a pair or a two-element tuple", SV("{:m}"), input);
check(SV("__42___"), SV("{:_^7n}"), input);
for (CharT c : SV("aAbBcdeEfFgGopsxX?")) {
check_exception("The format-spec should consume the input or end with a '}'",
std::basic_string_view{STR("{:") + c + STR("}")},
input);
}
}
template <class CharT, class TestFunction, class ExceptionTest>
void test_tuple_int_string_color(TestFunction check, ExceptionTest check_exception) {
const auto input = std::make_tuple(42, SV("hello"), color::red);
check(SV("(42, \"hello\", \"red\")"), SV("{}"), input);
// *** align-fill & width ***
check(SV("(42, \"hello\", \"red\") "), SV("{:25}"), input);
check(SV("(42, \"hello\", \"red\")*****"), SV("{:*<25}"), input);
check(SV("__(42, \"hello\", \"red\")___"), SV("{:_^25}"), input);
check(SV("#####(42, \"hello\", \"red\")"), SV("{:#>25}"), input);
check(SV("(42, \"hello\", \"red\") "), SV("{:{}}"), input, 25);
check(SV("(42, \"hello\", \"red\")*****"), SV("{:*<{}}"), input, 25);
check(SV("__(42, \"hello\", \"red\")___"), SV("{:_^{}}"), input, 25);
check(SV("#####(42, \"hello\", \"red\")"), SV("{:#>{}}"), input, 25);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:}<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:{<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{::<}"), input);
// *** sign ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:-}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{:+}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{: }"), input);
// *** alternate form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:#}"), input);
// *** zero-padding ***
check_exception("A format-spec width field shouldn't have a leading zero", SV("{:0}"), input);
// *** precision ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:.}"), input);
// *** locale-specific form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:L}"), input);
// *** type ***
check_exception("The format specifier m requires a pair or a two-element tuple", SV("{:m}"), input);
check(SV("__42, \"hello\", \"red\"___"), SV("{:_^23n}"), input);
for (CharT c : SV("aAbBcdeEfFgGopsxX?")) {
check_exception("The format-spec should consume the input or end with a '}'",
std::basic_string_view{STR("{:") + c + STR("}")},
input);
}
}
template <class CharT, class TestFunction, class ExceptionTest>
void test_tuple_int_int(TestFunction check, ExceptionTest check_exception) {
test_tuple_or_pair_int_int<CharT>(check, check_exception, std::make_tuple(42, 99));
}
template <class CharT, class TestFunction, class ExceptionTest>
void test_tuple_int_string(TestFunction check, ExceptionTest check_exception) {
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_tuple(42, SV("hello")));
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_tuple(42, STR("hello")));
test_tuple_or_pair_int_string<CharT>(check, check_exception, std::make_tuple(42, CSTR("hello")));
}
//
// nested tests
//
template <class CharT, class TestFunction, class ExceptionTest, class Nested>
void test_nested(TestFunction check, ExceptionTest check_exception, Nested&& input) {
// [format.formatter.spec]/2
// A debug-enabled specialization of formatter additionally provides a
// public, constexpr, non-static member function set_debug_format()
// which modifies the state of the formatter to be as if the type of the
// std-format-spec parsed by the last call to parse were ?.
// pair and tuple are not debug-enabled specializations to the
// set_debug_format is not propagated. The paper
// P2733 Fix handling of empty specifiers in std::format
// addressed this.
check(SV("(42, (hello, red))"), SV("{}"), input);
// *** align-fill & width ***
check(SV("(42, (hello, red)) "), SV("{:23}"), input);
check(SV("(42, (hello, red))*****"), SV("{:*<23}"), input);
check(SV("__(42, (hello, red))___"), SV("{:_^23}"), input);
check(SV("#####(42, (hello, red))"), SV("{:#>23}"), input);
check(SV("(42, (hello, red)) "), SV("{:{}}"), input, 23);
check(SV("(42, (hello, red))*****"), SV("{:*<{}}"), input, 23);
check(SV("__(42, (hello, red))___"), SV("{:_^{}}"), input, 23);
check(SV("#####(42, (hello, red))"), SV("{:#>{}}"), input, 23);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:}<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{:{<}"), input);
check_exception("The format-spec range-fill field contains an invalid character", SV("{::<}"), input);
// *** sign ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:-}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{:+}"), input);
check_exception("The format-spec should consume the input or end with a '}'", SV("{: }"), input);
// *** alternate form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:#}"), input);
// *** zero-padding ***
check_exception("A format-spec width field shouldn't have a leading zero", SV("{:0}"), input);
// *** precision ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:.}"), input);
// *** locale-specific form ***
check_exception("The format-spec should consume the input or end with a '}'", SV("{:L}"), input);
// *** type ***
check(SV("__42: (hello, red)___"), SV("{:_^21m}"), input);
check(SV("__42, (hello, red)___"), SV("{:_^21n}"), input);
for (CharT c : SV("aAbBcdeEfFgGopsxX?")) {
check_exception("The format-spec should consume the input or end with a '}'",
std::basic_string_view{STR("{:") + c + STR("}")},
input);
}
}
template <class CharT, class TestFunction, class ExceptionTest>
void run_tests(TestFunction check, ExceptionTest check_exception) {
test_pair_int_int<CharT>(check, check_exception);
test_pair_int_string<CharT>(check, check_exception);
test_tuple_int<CharT>(check, check_exception);
test_tuple_int_int<CharT>(check, check_exception);
test_tuple_int_string<CharT>(check, check_exception);
test_tuple_int_string_color<CharT>(check, check_exception);
test_nested<CharT>(check, check_exception, std::make_pair(42, std::make_pair(SV("hello"), color::red)));
test_nested<CharT>(check, check_exception, std::make_pair(42, std::make_tuple(SV("hello"), color::red)));
test_nested<CharT>(check, check_exception, std::make_tuple(42, std::make_pair(SV("hello"), color::red)));
test_nested<CharT>(check, check_exception, std::make_tuple(42, std::make_tuple(SV("hello"), color::red)));
test_escaping<CharT>(check, std::make_pair(CharT('*'), STR("")));
test_escaping<CharT>(check, std::make_tuple(CharT('*'), STR("")));
// Test cvref-qualified types.
// clang-format off
check(SV("(42)"), SV("{}"), std::tuple< int >{42});
check(SV("(42)"), SV("{}"), std::tuple<const int >{42});
check(SV("(42)"), SV("{}"), std::tuple< volatile int >{42});
check(SV("(42)"), SV("{}"), std::tuple<const volatile int >{42});
int answer = 42;
check(SV("(42)"), SV("{}"), std::tuple< int& >{answer});
check(SV("(42)"), SV("{}"), std::tuple<const int& >{answer});
check(SV("(42)"), SV("{}"), std::tuple< volatile int& >{answer});
check(SV("(42)"), SV("{}"), std::tuple<const volatile int& >{answer});
check(SV("(42)"), SV("{}"), std::tuple< int&&>{42});
check(SV("(42)"), SV("{}"), std::tuple<const int&&>{42});
check(SV("(42)"), SV("{}"), std::tuple< volatile int&&>{42});
check(SV("(42)"), SV("{}"), std::tuple<const volatile int&&>{42});
// clang-format on
}
#endif // TEST_STD_UTILITIES_FORMAT_FORMAT_TUPLE_FORMAT_TESTS_H
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