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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// These tests require locale for non-char paths
// UNSUPPORTED: libcpp-has-no-localization
// <filesystem>
// class path
// template <class Source>
// path& operator=(Source const&);
// path& operator=(string_type&&);
// template <class Source>
// path& assign(Source const&);
// template <class InputIterator>
// path& assign(InputIterator first, InputIterator last);
#include "filesystem_include.h"
#include <type_traits>
#include <string_view>
#include <cassert>
// On Windows, charset conversions cause allocations in the path class in
// cases where no allocations are done on other platforms.
#include "test_macros.h"
#include "test_iterators.h"
#include "count_new.h"
#include "filesystem_test_helper.h"
template <class CharT>
void RunTestCase(MultiStringType const& MS) {
using namespace fs;
const fs::path::value_type* Expect = MS;
const CharT* TestPath = MS;
const CharT* TestPathEnd = StrEnd(TestPath);
const std::size_t Size = TestPathEnd - TestPath;
const std::size_t SSize = StrEnd(Expect) - Expect;
assert(Size == SSize);
//////////////////////////////////////////////////////////////////////////////
// basic_string<Char, Traits, Alloc>
{
const std::basic_string<CharT> S(TestPath);
path p; PathReserve(p, S.length() + 1);
{
// string provides a contiguous iterator. No allocation needed.
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = (p = S);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
assert(p.string<CharT>() == S);
}
{
const std::basic_string<CharT> S(TestPath);
path p; PathReserve(p, S.length() + 1);
{
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = p.assign(S);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
assert(p.string<CharT>() == S);
}
// basic_string<Char, Traits, Alloc>
{
const std::basic_string_view<CharT> S(TestPath);
path p; PathReserve(p, S.length() + 1);
{
// string provides a contiguous iterator. No allocation needed.
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = (p = S);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
assert(p.string<CharT>() == S);
}
{
const std::basic_string_view<CharT> S(TestPath);
path p; PathReserve(p, S.length() + 1);
{
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = p.assign(S);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
assert(p.string<CharT>() == S);
}
//////////////////////////////////////////////////////////////////////////////
// Char* pointers
{
path p; PathReserve(p, Size + 1);
{
// char* pointers are contiguous and can be used with code_cvt directly.
// no allocations needed.
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = (p = TestPath);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
{
path p; PathReserve(p, Size + 1);
{
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = p.assign(TestPath);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
{
path p; PathReserve(p, Size + 1);
{
TEST_NOT_WIN32(DisableAllocationGuard g);
path& pref = p.assign(TestPath, TestPathEnd);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
//////////////////////////////////////////////////////////////////////////////
// Iterators
{
using It = cpp17_input_iterator<const CharT*>;
path p; PathReserve(p, Size + 1);
It it(TestPath);
{
// Iterators cannot be used with code_cvt directly. This assignment
// may allocate if it's larger than a "short-string".
path& pref = (p = it);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
{
using It = cpp17_input_iterator<const CharT*>;
path p; PathReserve(p, Size + 1);
It it(TestPath);
{
path& pref = p.assign(it);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
{
using It = cpp17_input_iterator<const CharT*>;
path p; PathReserve(p, Size + 1);
It it(TestPath);
It e(TestPathEnd);
{
path& pref = p.assign(it, e);
assert(&pref == &p);
}
assert(p.native() == Expect);
assert(p.string<CharT>() == TestPath);
}
}
template <class It, class = decltype(fs::path{}.assign(std::declval<It>()))>
constexpr bool has_assign(int) { return true; }
template <class It>
constexpr bool has_assign(long) { return false; }
template <class It>
constexpr bool has_assign() { return has_assign<It>(0); }
void test_sfinae() {
using namespace fs;
{
using It = const char* const;
static_assert(std::is_assignable<path, It>::value, "");
static_assert(has_assign<It>(), "");
}
{
using It = cpp17_input_iterator<const char*>;
static_assert(std::is_assignable<path, It>::value, "");
static_assert(has_assign<It>(), "");
}
{
struct Traits {
using iterator_category = std::input_iterator_tag;
using value_type = const char;
using pointer = const char*;
using reference = const char&;
using difference_type = std::ptrdiff_t;
};
using It = cpp17_input_iterator<const char*, Traits>;
static_assert(std::is_assignable<path, It>::value, "");
static_assert(has_assign<It>(), "");
}
{
using It = output_iterator<const char*>;
static_assert(!std::is_assignable<path, It>::value, "");
static_assert(!has_assign<It>(), "");
}
{
static_assert(!std::is_assignable<path, int*>::value, "");
static_assert(!has_assign<int*>(), "");
}
}
void RunStringMoveTest(const fs::path::value_type* Expect) {
using namespace fs;
fs::path::string_type ss(Expect);
path p;
{
DisableAllocationGuard g; ((void)g);
path& pr = (p = std::move(ss));
assert(&pr == &p);
}
assert(p == Expect);
{
// Signature test
LIBCPP_ONLY(ASSERT_NOEXCEPT(p = std::move(ss)));
}
}
int main(int, char**) {
for (auto const& MS : PathList) {
RunTestCase<char>(MS);
RunTestCase<wchar_t>(MS);
RunTestCase<char16_t>(MS);
RunTestCase<char32_t>(MS);
RunStringMoveTest(MS);
}
test_sfinae();
return 0;
}
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