c52f43e72d
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111767 91177308-0d34-0410-b5e6-96231b3b80d8
154 lines
3.2 KiB
C++
154 lines
3.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// allocator:
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// template <class... Args> void construct(pointer p, Args&&... args);
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#include <memory>
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#include <new>
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#include <cstdlib>
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#include <cassert>
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int new_called = 0;
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void* operator new(std::size_t s) throw(std::bad_alloc)
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{
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++new_called;
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assert(s == 3 * sizeof(int));
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return std::malloc(s);
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}
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void operator delete(void* p) throw()
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{
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--new_called;
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std::free(p);
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}
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int A_constructed = 0;
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struct A
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{
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int data;
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A() {++A_constructed;}
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A(const A&) {++A_constructed;}
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explicit A(int) {++A_constructed;}
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A(int, int*) {++A_constructed;}
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~A() {--A_constructed;}
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};
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int move_only_constructed = 0;
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class move_only
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{
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int data;
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#ifdef _LIBCPP_MOVE
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move_only(const move_only&);
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move_only& operator=(const move_only&);
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#else // _LIBCPP_MOVE
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move_only(move_only&);
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move_only& operator=(move_only&);
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#endif // _LIBCPP_MOVE
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public:
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#ifdef _LIBCPP_MOVE
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move_only(move_only&&) {++move_only_constructed;}
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move_only& operator=(move_only&&) {}
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#else // _LIBCPP_MOVE
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operator std::__rv<move_only> () {return std::__rv<move_only>(*this);}
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move_only(std::__rv<move_only>) {++move_only_constructed;}
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#endif // _LIBCPP_MOVE
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move_only() {++move_only_constructed;}
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~move_only() {--move_only_constructed;}
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};
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int main()
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{
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{
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std::allocator<A> a;
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assert(new_called == 0);
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assert(A_constructed == 0);
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A* ap = a.allocate(3);
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assert(new_called == 1);
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assert(A_constructed == 0);
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a.construct(ap);
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assert(new_called == 1);
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assert(A_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(A_constructed == 0);
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a.construct(ap, A());
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assert(new_called == 1);
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assert(A_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(A_constructed == 0);
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a.construct(ap, 5);
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assert(new_called == 1);
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assert(A_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(A_constructed == 0);
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a.construct(ap, 5, (int*)0);
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assert(new_called == 1);
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assert(A_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(A_constructed == 0);
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a.deallocate(ap, 3);
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assert(new_called == 0);
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assert(A_constructed == 0);
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}
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{
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std::allocator<move_only> a;
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assert(new_called == 0);
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assert(move_only_constructed == 0);
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move_only* ap = a.allocate(3);
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assert(new_called == 1);
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assert(move_only_constructed == 0);
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a.construct(ap);
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assert(new_called == 1);
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assert(move_only_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(move_only_constructed == 0);
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a.construct(ap, move_only());
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assert(new_called == 1);
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assert(move_only_constructed == 1);
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a.destroy(ap);
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assert(new_called == 1);
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assert(move_only_constructed == 0);
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a.deallocate(ap, 3);
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assert(new_called == 0);
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assert(move_only_constructed == 0);
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}
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}
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