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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
//
//===----------------------------------------------------------------------===//
// <string>
// basic_string(const basic_string& str, const Allocator& alloc); // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"
#ifndef TEST_HAS_NO_EXCEPTIONS
struct alloc_imp {
bool active;
TEST_CONSTEXPR alloc_imp() : active(true) {}
template <class T>
T* allocate(std::size_t n)
{
if (active)
return static_cast<T*>(std::malloc(n * sizeof(T)));
else
throw std::bad_alloc();
}
template <class T>
void deallocate(T* p, std::size_t) { std::free(p); }
void activate () { active = true; }
void deactivate() { active = false; }
};
template <class T>
struct poca_alloc {
typedef T value_type;
typedef std::true_type propagate_on_container_copy_assignment;
alloc_imp *imp;
TEST_CONSTEXPR poca_alloc(alloc_imp *imp_) : imp (imp_) {}
template <class U>
TEST_CONSTEXPR poca_alloc(const poca_alloc<U>& other) : imp(other.imp) {}
T* allocate (std::size_t n) { return imp->allocate<T>(n);}
void deallocate(T* p, std::size_t n) { imp->deallocate(p, n); }
};
template <typename T, typename U>
bool operator==(const poca_alloc<T>& lhs, const poca_alloc<U>& rhs)
{
return lhs.imp == rhs.imp;
}
template <typename T, typename U>
bool operator!=(const poca_alloc<T>& lhs, const poca_alloc<U>& rhs)
{
return lhs.imp != rhs.imp;
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_assign(S &s1, const S& s2)
{
try { s1 = s2; }
catch ( std::bad_alloc &) { return; }
assert(false);
}
#endif
template <class S>
TEST_CONSTEXPR_CXX20 void
test(S s1, const typename S::allocator_type& a)
{
S s2(s1, a);
LIBCPP_ASSERT(s2.__invariants());
assert(s2 == s1);
assert(s2.capacity() >= s2.size());
assert(s2.get_allocator() == a);
}
TEST_CONSTEXPR_CXX20 bool test() {
{
typedef test_allocator<char> A;
typedef std::basic_string<char, std::char_traits<char>, A> S;
test(S(), A(3));
test(S("1"), A(5));
test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A(7));
}
#if TEST_STD_VER >= 11
{
typedef min_allocator<char> A;
typedef std::basic_string<char, std::char_traits<char>, A> S;
test(S(), A());
test(S("1"), A());
test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A());
}
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) {
typedef poca_alloc<char> A;
typedef std::basic_string<char, std::char_traits<char>, A> S;
const char * p1 = "This is my first string";
const char * p2 = "This is my second string";
alloc_imp imp1;
alloc_imp imp2;
S s1(p1, A(&imp1));
S s2(p2, A(&imp2));
assert(s1 == p1);
assert(s2 == p2);
imp2.deactivate();
test_assign(s1, s2);
assert(s1 == p1);
assert(s2 == p2);
}
#endif
#endif
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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