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134 lines
3.1 KiB
C++
134 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// basic_string(const basic_string& str, const Allocator& alloc);
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#include "test_allocator.h"
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#include "min_allocator.h"
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#ifndef TEST_HAS_NO_EXCEPTIONS
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struct alloc_imp {
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bool active;
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alloc_imp() : active(true) {}
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template <class T>
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T* allocate(std::size_t n)
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{
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if (active)
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return static_cast<T*>(std::malloc(n * sizeof(T)));
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else
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throw std::bad_alloc();
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}
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template <class T>
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void deallocate(T* p, std::size_t) { std::free(p); }
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void activate () { active = true; }
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void deactivate() { active = false; }
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};
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template <class T>
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struct poca_alloc {
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typedef T value_type;
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typedef std::true_type propagate_on_container_copy_assignment;
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alloc_imp *imp;
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poca_alloc(alloc_imp *imp_) : imp (imp_) {}
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template <class U>
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poca_alloc(const poca_alloc<U>& other) : imp(other.imp) {}
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T* allocate (std::size_t n) { return imp->allocate<T>(n);}
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void deallocate(T* p, std::size_t n) { imp->deallocate(p, n); }
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};
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template <typename T, typename U>
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bool operator==(const poca_alloc<T>& lhs, const poca_alloc<U>& rhs)
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{
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return lhs.imp == rhs.imp;
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}
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template <typename T, typename U>
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bool operator!=(const poca_alloc<T>& lhs, const poca_alloc<U>& rhs)
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{
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return lhs.imp != rhs.imp;
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}
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template <class S>
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void test_assign(S &s1, const S& s2)
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{
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try { s1 = s2; }
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catch ( std::bad_alloc &) { return; }
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assert(false);
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}
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#endif
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template <class S>
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void
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test(S s1, const typename S::allocator_type& a)
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{
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S s2(s1, a);
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LIBCPP_ASSERT(s2.__invariants());
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assert(s2 == s1);
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assert(s2.capacity() >= s2.size());
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assert(s2.get_allocator() == a);
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}
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int main(int, char**)
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{
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{
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typedef test_allocator<char> A;
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typedef std::basic_string<char, std::char_traits<char>, A> S;
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test(S(), A(3));
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test(S("1"), A(5));
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test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A(7));
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}
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#if TEST_STD_VER >= 11
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{
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typedef min_allocator<char> A;
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typedef std::basic_string<char, std::char_traits<char>, A> S;
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test(S(), A());
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test(S("1"), A());
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test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), A());
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}
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#ifndef TEST_HAS_NO_EXCEPTIONS
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{
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typedef poca_alloc<char> A;
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typedef std::basic_string<char, std::char_traits<char>, A> S;
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const char * p1 = "This is my first string";
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const char * p2 = "This is my second string";
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alloc_imp imp1;
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alloc_imp imp2;
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S s1(p1, A(&imp1));
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S s2(p2, A(&imp2));
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assert(s1 == p1);
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assert(s2 == p2);
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imp2.deactivate();
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test_assign(s1, s2);
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assert(s1 == p1);
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assert(s2 == p2);
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}
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#endif
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#endif
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return 0;
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}
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