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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <memory>
// allocator:
// template <class... Args> void construct(pointer p, Args&&... args);
#include <memory>
#include <new>
#include <cstdlib>
#include <cassert>
int new_called = 0;
void* operator new(std::size_t s) throw(std::bad_alloc)
{
++new_called;
assert(s == 3 * sizeof(int));
return std::malloc(s);
}
void operator delete(void* p) throw()
{
--new_called;
std::free(p);
}
int A_constructed = 0;
struct A
{
int data;
A() {++A_constructed;}
A(const A&) {++A_constructed;}
explicit A(int) {++A_constructed;}
A(int, int*) {++A_constructed;}
~A() {--A_constructed;}
};
int move_only_constructed = 0;
class move_only
{
int data;
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
move_only(const move_only&);
move_only& operator=(const move_only&);
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
move_only(move_only&);
move_only& operator=(move_only&);
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
public:
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
move_only(move_only&&) {++move_only_constructed;}
move_only& operator=(move_only&&) {return *this;}
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
operator std::__rv<move_only> () {return std::__rv<move_only>(*this);}
move_only(std::__rv<move_only>) {++move_only_constructed;}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
move_only() {++move_only_constructed;}
~move_only() {--move_only_constructed;}
};
int main()
{
{
std::allocator<A> a;
assert(new_called == 0);
assert(A_constructed == 0);
A* ap = a.allocate(3);
assert(new_called == 1);
assert(A_constructed == 0);
a.construct(ap);
assert(new_called == 1);
assert(A_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(A_constructed == 0);
a.construct(ap, A());
assert(new_called == 1);
assert(A_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(A_constructed == 0);
a.construct(ap, 5);
assert(new_called == 1);
assert(A_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(A_constructed == 0);
a.construct(ap, 5, (int*)0);
assert(new_called == 1);
assert(A_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(A_constructed == 0);
a.deallocate(ap, 3);
assert(new_called == 0);
assert(A_constructed == 0);
}
{
std::allocator<move_only> a;
assert(new_called == 0);
assert(move_only_constructed == 0);
move_only* ap = a.allocate(3);
assert(new_called == 1);
assert(move_only_constructed == 0);
a.construct(ap);
assert(new_called == 1);
assert(move_only_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(move_only_constructed == 0);
a.construct(ap, move_only());
assert(new_called == 1);
assert(move_only_constructed == 1);
a.destroy(ap);
assert(new_called == 1);
assert(move_only_constructed == 0);
a.deallocate(ap, 3);
assert(new_called == 0);
assert(move_only_constructed == 0);
}
}
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