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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// Throwing bad_any_cast is supported starting in macosx10.13
// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}} && !no-exceptions
// <any>
// template <class Value> any(Value &&)
// Test construction from a value.
// Concerns:
// ---------
// 1. The value is properly move/copied depending on the value category.
// 2. Both small and large values are properly handled.
#include <any>
#include <cassert>
#include "any_helpers.h"
#include "count_new.h"
#include "test_macros.h"
using std::any;
using std::any_cast;
template <class Type>
void test_copy_value_throws()
{
#if !defined(TEST_HAS_NO_EXCEPTIONS)
assert(Type::count == 0);
{
Type const t(42);
assert(Type::count == 1);
try {
any const a2(t);
assert(false);
} catch (my_any_exception const &) {
// do nothing
} catch (...) {
assert(false);
}
assert(Type::count == 1);
assert(t.value == 42);
}
assert(Type::count == 0);
#endif
}
void test_move_value_throws()
{
#if !defined(TEST_HAS_NO_EXCEPTIONS)
assert(throws_on_move::count == 0);
{
throws_on_move v;
assert(throws_on_move::count == 1);
try {
any const a(std::move(v));
assert(false);
} catch (my_any_exception const &) {
// do nothing
} catch (...) {
assert(false);
}
assert(throws_on_move::count == 1);
}
assert(throws_on_move::count == 0);
#endif
}
template <class Type>
void test_copy_move_value() {
// constructing from a small type should perform no allocations.
DisableAllocationGuard g(isSmallType<Type>()); ((void)g);
assert(Type::count == 0);
Type::reset();
{
Type t(42);
assert(Type::count == 1);
any a(t);
assert(Type::count == 2);
assert(Type::copied == 1);
assert(Type::moved == 0);
assertContains<Type>(a, 42);
}
assert(Type::count == 0);
Type::reset();
{
Type t(42);
assert(Type::count == 1);
any a(std::move(t));
assert(Type::count == 2);
assert(Type::copied == 0);
assert(Type::moved == 1);
assertContains<Type>(a, 42);
}
}
// Test that any(ValueType&&) is *never* selected for a std::in_place_type_t specialization.
void test_sfinae_constraints() {
using BadTag = std::in_place_type_t<int>;
using OKTag = std::in_place_t;
// Test that the tag type is properly handled in SFINAE
BadTag t = std::in_place_type<int>;
OKTag ot = std::in_place;
{
std::any a(t);
assertContains<int>(a, 0);
}
{
std::any a(std::move(t));
assertContains<int>(a, 0);
}
{
std::any a(ot);
assert(containsType<OKTag>(a));
}
{
struct Dummy { Dummy() = delete; };
using T = std::in_place_type_t<Dummy>;
static_assert(!std::is_constructible<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(int) {}
};
static_assert(!std::is_constructible<std::any, NoCopy>::value, "");
static_assert(!std::is_constructible<std::any, NoCopy&>::value, "");
static_assert(!std::is_convertible<NoCopy, std::any>::value, "");
}
}
int main(int, char**) {
test_copy_move_value<small>();
test_copy_move_value<large>();
test_copy_value_throws<small_throws_on_copy>();
test_copy_value_throws<large_throws_on_copy>();
test_move_value_throws();
test_sfinae_constraints();
return 0;
}
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