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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
//
//===----------------------------------------------------------------------===//
// <functional>
// REQUIRES: c++03 || c++11 || c++14
// class function<R(ArgTypes...)>
// template<class F, class A> function(allocator_arg_t, const A&, F);
// This test runs in C++03, but we have deprecated using std::function in C++03.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
#include <functional>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
#include "test_allocator.h"
#include "count_new.h"
#include "../function_types.h"
#if TEST_STD_VER >= 11
struct RValueCallable {
template <class ...Args>
void operator()(Args&&...) && {}
};
struct LValueCallable {
template <class ...Args>
void operator()(Args&&...) & {}
};
#endif
class DummyClass {};
template <class FuncType, class AllocType>
void test_FunctionObject(AllocType& alloc)
{
assert(globalMemCounter.checkOutstandingNewEq(0));
{
FunctionObject target;
assert(FunctionObject::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(0));
std::function<FuncType> f2(std::allocator_arg, alloc, target);
assert(FunctionObject::count == 2);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(f2.template target<FunctionObject>());
assert(f2.template target<FuncType>() == 0);
assert(f2.template target<FuncType*>() == 0);
}
assert(FunctionObject::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
}
template <class FuncType, class AllocType>
void test_FreeFunction(AllocType& alloc)
{
assert(globalMemCounter.checkOutstandingNewEq(0));
{
FuncType* target = &FreeFunction;
assert(globalMemCounter.checkOutstandingNewEq(0));
std::function<FuncType> f2(std::allocator_arg, alloc, target);
// The allocator may not fit in the small object buffer, if we allocated
// check it was done via the allocator.
assert(globalMemCounter.checkOutstandingNewEq(test_alloc_base::alloc_count));
assert(f2.template target<FuncType*>());
assert(*f2.template target<FuncType*>() == target);
assert(f2.template target<FuncType>() == 0);
assert(f2.template target<DummyClass>() == 0);
}
assert(globalMemCounter.checkOutstandingNewEq(0));
}
template <class TargetType, class FuncType, class AllocType>
void test_MemFunClass(AllocType& alloc)
{
assert(globalMemCounter.checkOutstandingNewEq(0));
{
TargetType target = &MemFunClass::foo;
assert(globalMemCounter.checkOutstandingNewEq(0));
std::function<FuncType> f2(std::allocator_arg, alloc, target);
assert(globalMemCounter.checkOutstandingNewEq(test_alloc_base::alloc_count));
assert(f2.template target<TargetType>());
assert(*f2.template target<TargetType>() == target);
assert(f2.template target<FuncType*>() == 0);
}
assert(globalMemCounter.checkOutstandingNewEq(0));
}
template <class Alloc>
void test_for_alloc(Alloc& alloc) {
test_FunctionObject<int()>(alloc);
test_FunctionObject<int(int)>(alloc);
test_FunctionObject<int(int, int)>(alloc);
test_FunctionObject<int(int, int, int)>(alloc);
test_FreeFunction<int()>(alloc);
test_FreeFunction<int(int)>(alloc);
test_FreeFunction<int(int, int)>(alloc);
test_FreeFunction<int(int, int, int)>(alloc);
test_MemFunClass<int(MemFunClass::*)() const, int(MemFunClass&)>(alloc);
test_MemFunClass<int(MemFunClass::*)(int) const, int(MemFunClass&, int)>(alloc);
test_MemFunClass<int(MemFunClass::*)(int, int) const, int(MemFunClass&, int, int)>(alloc);
}
int main(int, char**)
{
globalMemCounter.reset();
{
bare_allocator<DummyClass> bare_alloc;
test_for_alloc(bare_alloc);
}
{
non_default_test_allocator<DummyClass> non_default_alloc(42);
test_for_alloc(non_default_alloc);
}
#if TEST_STD_VER >= 11
{
using Fn = std::function<void(int, int, int)>;
static_assert(std::is_constructible<Fn, std::allocator_arg_t, std::allocator<int>, LValueCallable&>::value, "");
static_assert(std::is_constructible<Fn, std::allocator_arg_t, std::allocator<int>, LValueCallable>::value, "");
static_assert(!std::is_constructible<Fn, std::allocator_arg_t, std::allocator<int>, RValueCallable&>::value, "");
static_assert(!std::is_constructible<Fn, std::allocator_arg_t, std::allocator<int>, RValueCallable>::value, "");
}
#endif
return 0;
}
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