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Differential D110494 Diff 375090 libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp

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libcxx/test/std/utilities/format/format.functions/vformat_to.pass.cpp

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// The tests write fixed size buffer, make sure it remains in bounds. // The tests write fixed size buffer, make sure it remains in bounds.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DEBUG=1 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DEBUG=1
// UNSUPPORTED: libcxx-no-debug-mode // UNSUPPORTED: libcxx-no-debug-mode
// <format> // <format>
// template<class Out> // template<class Out>
// Out vformat_to(Out out, string_view fmt, // Out vformat_to(Out out, string_view fmt, format_args args);
// format_args_t<type_identity_t<Out>, char> args);
// template<class Out> // template<class Out>
// Out vformat_to(Out out, wstring_view fmt, // Out vformat_to(Out out, wstring_view fmt, wformat_args_t args);
// format_args_t<type_identity_t<Out>, wchar_t> args);
#include <format> #include <format>
#include <algorithm> #include <algorithm>
#include <cassert> #include <cassert>
#include <list> #include <list>
#include <vector> #include <vector>
#include "test_macros.h" #include "test_macros.h"
#include "format_tests.h" #include "format_tests.h"
auto test = []<class CharT, class... Args>(std::basic_string<CharT> expected, auto test = []<class CharT, class... Args>(std::basic_string<CharT> expected,
std::basic_string<CharT> fmt, std::basic_string<CharT> fmt,
const Args&... args) { const Args&... args) {
{ {
std::basic_string<CharT> out(expected.size(), CharT(' ')); std::basic_string<CharT> out(expected.size(), CharT(' '));
auto it = std::vformat_to( auto it = std::vformat_to(out.begin(), fmt,
out.begin(), fmt, std::make_format_args<context_t<CharT>>(args...));
std::make_format_args<std::basic_format_context<
typename std::basic_string<CharT>::iterator, CharT>>(args...));
assert(it == out.end()); assert(it == out.end());
assert(out == expected); assert(out == expected);
} }
{ {
std::list<CharT> out; std::list<CharT> out;
std::vformat_to( std::vformat_to(std::back_inserter(out), fmt,
std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...));
std::make_format_args<std::basic_format_context<
std::back_insert_iterator<std::list<CharT>>, CharT>>(args...));
assert( assert(
std::equal(out.begin(), out.end(), expected.begin(), expected.end())); std::equal(out.begin(), out.end(), expected.begin(), expected.end()));
} }
{ {
std::vector<CharT> out; std::vector<CharT> out;
std::vformat_to( std::vformat_to(std::back_inserter(out), fmt,
std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...));
std::make_format_args<std::basic_format_context<
std::back_insert_iterator<std::vector<CharT>>, CharT>>(args...));
assert( assert(
std::equal(out.begin(), out.end(), expected.begin(), expected.end())); std::equal(out.begin(), out.end(), expected.begin(), expected.end()));
} }
{ {
assert(expected.size() < 4096 && "Update the size of the buffer."); assert(expected.size() < 4096 && "Update the size of the buffer.");
CharT out[4096]; CharT out[4096];
CharT* it = std::vformat_to( CharT* it = std::vformat_to(
out, fmt, out, fmt, std::make_format_args<context_t<CharT>>(args...));
std::make_format_args<std::basic_format_context<CharT*, CharT>>(
args...));
assert(std::distance(out, it) == int(expected.size())); assert(std::distance(out, it) == int(expected.size()));
// Convert to std::string since output contains '\0' for boolean tests. // Convert to std::string since output contains '\0' for boolean tests.
assert(std::basic_string<CharT>(out, it) == expected); assert(std::basic_string<CharT>(out, it) == expected);
} }
}; };
auto test_exception = []<class CharT, class... Args>( auto test_exception = []<class CharT, class... Args>(
std::string_view what, std::basic_string<CharT> fmt, const Args&... args) { std::string_view what, std::basic_string<CharT> fmt, const Args&... args) {
#ifndef TEST_HAS_NO_EXCEPTIONS #ifndef TEST_HAS_NO_EXCEPTIONS
try { try {
std::basic_string<CharT> out; std::basic_string<CharT> out;
std::vformat_to( std::vformat_to(std::back_inserter(out), fmt,
std::back_inserter(out), fmt, std::make_format_args<context_t<CharT>>(args...));
std::make_format_args<std::basic_format_context<
std::back_insert_iterator<std::basic_string<CharT>>, CharT>>(
args...));
assert(false); assert(false);
} catch (std::format_error& e) { } catch (std::format_error& e) {
LIBCPP_ASSERT(e.what() == what); LIBCPP_ASSERT(e.what() == what);
return; return;
} }
assert(false); assert(false);
#else #else
(void)what; (void)what;
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