b05f0599c0
The C++03 version of function tried to default construct the allocator in the uses allocator constructors when no allocation was performed. These constructors would fail to compile when used with allocators that had no default constructor. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@239708 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
4.2 KiB
C++
125 lines
4.2 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 dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// class function<R(ArgTypes...)>
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// template<class A> function(allocator_arg_t, const A&, const function&);
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#include <functional>
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#include <cassert>
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#include "min_allocator.h"
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#include "test_allocator.h"
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#include "count_new.hpp"
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#include "../function_types.h"
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class DummyClass {};
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template <class FuncType, class AllocType>
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void test_FunctionObject(AllocType& alloc)
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{
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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// Construct function from FunctionObject.
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std::function<FuncType> f = FunctionObject();
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assert(FunctionObject::count == 1);
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assert(globalMemCounter.checkOutstandingNewEq(1));
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assert(f.template target<FunctionObject>());
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assert(f.template target<FuncType>() == 0);
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assert(f.template target<FuncType*>() == 0);
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// Copy function with allocator
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std::function<FuncType> f2(std::allocator_arg, alloc, f);
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assert(FunctionObject::count == 2);
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assert(globalMemCounter.checkOutstandingNewEq(2));
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assert(f2.template target<FunctionObject>());
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assert(f2.template target<FuncType>() == 0);
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assert(f2.template target<FuncType*>() == 0);
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}
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assert(FunctionObject::count == 0);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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}
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template <class FuncType, class AllocType>
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void test_FreeFunction(AllocType& alloc)
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{
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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// Construct function from function pointer.
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FuncType* target = &FreeFunction;
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std::function<FuncType> f = target;
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f.template target<FuncType*>());
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assert(*f.template target<FuncType*>() == target);
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assert(f.template target<FuncType>() == 0);
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// Copy function with allocator
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std::function<FuncType> f2(std::allocator_arg, alloc, f);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f2.template target<FuncType*>());
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assert(*f2.template target<FuncType*>() == target);
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assert(f2.template target<FuncType>() == 0);
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}
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assert(globalMemCounter.checkOutstandingNewEq(0));
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}
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template <class TargetType, class FuncType, class AllocType>
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void test_MemFunClass(AllocType& alloc)
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{
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assert(globalMemCounter.checkOutstandingNewEq(0));
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{
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// Construct function from function pointer.
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TargetType target = &MemFunClass::foo;
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std::function<FuncType> f = target;
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f.template target<TargetType>());
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assert(*f.template target<TargetType>() == target);
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assert(f.template target<FuncType*>() == 0);
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// Copy function with allocator
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std::function<FuncType> f2(std::allocator_arg, alloc, f);
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assert(globalMemCounter.checkOutstandingNewEq(0));
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assert(f2.template target<TargetType>());
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assert(*f2.template target<TargetType>() == target);
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assert(f2.template target<FuncType*>() == 0);
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}
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assert(globalMemCounter.checkOutstandingNewEq(0));
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}
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template <class Alloc>
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void test_for_alloc(Alloc& alloc)
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{
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// Large FunctionObject -- Allocation should occur
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test_FunctionObject<int()>(alloc);
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test_FunctionObject<int(int)>(alloc);
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test_FunctionObject<int(int, int)>(alloc);
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test_FunctionObject<int(int, int, int)>(alloc);
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// Free function -- No allocation should occur
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test_FreeFunction<int()>(alloc);
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test_FreeFunction<int(int)>(alloc);
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test_FreeFunction<int(int, int)>(alloc);
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test_FreeFunction<int(int, int, int)>(alloc);
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// Member function -- No allocation should occur.
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test_MemFunClass<int(MemFunClass::*)() const, int(MemFunClass&)>(alloc);
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test_MemFunClass<int(MemFunClass::*)(int) const, int(MemFunClass&, int)>(alloc);
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test_MemFunClass<int(MemFunClass::*)(int, int) const, int(MemFunClass&, int, int)>(alloc);
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}
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int main()
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{
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{
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bare_allocator<DummyClass> alloc;
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test_for_alloc(alloc);
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}
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{
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non_default_test_allocator<DummyClass> alloc(42);
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test_for_alloc(alloc);
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}
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}
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