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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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <any>
// template <class ValueType>
// any& operator=(ValueType&&);
// Test value copy and move assignment.
#include <any>
#include <cassert>
#include "any_helpers.h"
#include "count_new.hpp"
#include "test_macros.h"
using std::any;
using std::any_cast;
template <class LHS, class RHS>
void test_assign_value() {
assert(LHS::count == 0);
assert(RHS::count == 0);
LHS::reset();
RHS::reset();
{
any lhs(LHS(1));
any const rhs(RHS(2));
assert(LHS::count == 1);
assert(RHS::count == 1);
assert(RHS::copied == 0);
lhs = rhs;
assert(RHS::copied == 1);
assert(LHS::count == 0);
assert(RHS::count == 2);
assertContains<RHS>(lhs, 2);
assertContains<RHS>(rhs, 2);
}
assert(LHS::count == 0);
assert(RHS::count == 0);
LHS::reset();
RHS::reset();
{
any lhs(LHS(1));
any rhs(RHS(2));
assert(LHS::count == 1);
assert(RHS::count == 1);
assert(RHS::moved == 1);
lhs = std::move(rhs);
assert(RHS::moved >= 1);
assert(RHS::copied == 0);
assert(LHS::count == 0);
assert(RHS::count == 1 + rhs.has_value());
LIBCPP_ASSERT(!rhs.has_value());
assertContains<RHS>(lhs, 2);
if (rhs.has_value())
assertContains<RHS>(rhs, 0);
}
assert(LHS::count == 0);
assert(RHS::count == 0);
}
template <class RHS>
void test_assign_value_empty() {
assert(RHS::count == 0);
RHS::reset();
{
any lhs;
RHS rhs(42);
assert(RHS::count == 1);
assert(RHS::copied == 0);
lhs = rhs;
assert(RHS::count == 2);
assert(RHS::copied == 1);
assert(RHS::moved >= 0);
assertContains<RHS>(lhs, 42);
}
assert(RHS::count == 0);
RHS::reset();
{
any lhs;
RHS rhs(42);
assert(RHS::count == 1);
assert(RHS::moved == 0);
lhs = std::move(rhs);
assert(RHS::count == 2);
assert(RHS::copied == 0);
assert(RHS::moved >= 1);
assertContains<RHS>(lhs, 42);
}
assert(RHS::count == 0);
RHS::reset();
}
template <class Tp, bool Move = false>
void test_assign_throws() {
#if !defined(TEST_HAS_NO_EXCEPTIONS)
auto try_throw =
[](any& lhs, auto&& rhs) {
try {
Move ? lhs = std::move(rhs)
: lhs = rhs;
assert(false);
} catch (my_any_exception const &) {
// do nothing
} catch (...) {
assert(false);
}
};
// const lvalue to empty
{
any lhs;
Tp rhs(1);
assert(Tp::count == 1);
try_throw(lhs, rhs);
assert(Tp::count == 1);
assertEmpty<Tp>(lhs);
}
{
any lhs((small(2)));
Tp rhs(1);
assert(small::count == 1);
assert(Tp::count == 1);
try_throw(lhs, rhs);
assert(small::count == 1);
assert(Tp::count == 1);
assertContains<small>(lhs, 2);
}
{
any lhs((large(2)));
Tp rhs(1);
assert(large::count == 1);
assert(Tp::count == 1);
try_throw(lhs, rhs);
assert(large::count == 1);
assert(Tp::count == 1);
assertContains<large>(lhs, 2);
}
#endif
}
// Test that any& operator=(ValueType&&) is *never* selected for:
// * std::in_place type.
// * Non-copyable types
void test_sfinae_constraints() {
{ // Only the constructors are required to SFINAE on in_place_t
using Tag = std::in_place_type_t<int>;
using RawTag = std::remove_reference_t<Tag>;
static_assert(std::is_assignable<std::any, RawTag&&>::value, "");
}
{
struct Dummy { Dummy() = delete; };
using T = std::in_place_type_t<Dummy>;
static_assert(std::is_assignable<std::any, T>::value, "");
}
{
// Test that the ValueType&& constructor SFINAE's away when the
// argument is non-copyable
struct NoCopy {
NoCopy() = default;
NoCopy(NoCopy const&) = delete;
NoCopy(NoCopy&&) = default;
};
static_assert(!std::is_assignable<std::any, NoCopy>::value, "");
static_assert(!std::is_assignable<std::any, NoCopy&>::value, "");
}
}
int main() {
test_assign_value<small1, small2>();
test_assign_value<large1, large2>();
test_assign_value<small, large>();
test_assign_value<large, small>();
test_assign_value_empty<small>();
test_assign_value_empty<large>();
test_assign_throws<small_throws_on_copy>();
test_assign_throws<large_throws_on_copy>();
test_assign_throws<throws_on_move, /* Move = */ true>();
test_sfinae_constraints();
}
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