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7c3769df62
to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@351648 91177308-0d34-0410-b5e6-96231b3b80d8
413 lines
8.2 KiB
C++
413 lines
8.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// R operator()(ArgTypes... args) const
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#include <functional>
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#include <cassert>
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int count = 0;
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// 0 args, return int
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int f_int_0()
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{
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return 3;
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}
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struct A_int_0
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{
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int operator()() {return 4;}
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};
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void test_int_0()
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{
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// function
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{
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std::function<int ()> r1(f_int_0);
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assert(r1() == 3);
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}
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// function pointer
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{
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int (*fp)() = f_int_0;
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std::function<int ()> r1(fp);
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assert(r1() == 3);
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}
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// functor
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{
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A_int_0 a0;
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std::function<int ()> r1(a0);
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assert(r1() == 4);
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}
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}
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// 0 args, return void
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void f_void_0()
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{
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++count;
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}
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struct A_void_0
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{
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void operator()() {++count;}
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};
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void
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test_void_0()
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{
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int save_count = count;
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// function
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{
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std::function<void ()> r1(f_void_0);
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r1();
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assert(count == save_count+1);
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save_count = count;
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}
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// function pointer
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{
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void (*fp)() = f_void_0;
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std::function<void ()> r1(fp);
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r1();
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assert(count == save_count+1);
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save_count = count;
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}
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// functor
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{
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A_void_0 a0;
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std::function<void ()> r1(a0);
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r1();
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assert(count == save_count+1);
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save_count = count;
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}
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}
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// 1 arg, return void
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void f_void_1(int i)
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{
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count += i;
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}
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struct A_void_1
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{
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void operator()(int i)
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{
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count += i;
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}
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void mem1() {++count;}
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void mem2() const {++count;}
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};
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void
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test_void_1()
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{
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int save_count = count;
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// function
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{
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std::function<void (int)> r1(f_void_1);
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int i = 2;
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r1(i);
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assert(count == save_count+2);
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save_count = count;
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}
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// function pointer
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{
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void (*fp)(int) = f_void_1;
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std::function<void (int)> r1(fp);
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int i = 3;
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r1(i);
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assert(count == save_count+3);
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save_count = count;
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}
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// functor
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{
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A_void_1 a0;
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std::function<void (int)> r1(a0);
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int i = 4;
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r1(i);
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assert(count == save_count+4);
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save_count = count;
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}
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// member function pointer
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{
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void (A_void_1::*fp)() = &A_void_1::mem1;
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std::function<void (A_void_1)> r1(fp);
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A_void_1 a;
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r1(a);
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assert(count == save_count+1);
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save_count = count;
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A_void_1* ap = &a;
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std::function<void (A_void_1*)> r2 = fp;
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r2(ap);
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assert(count == save_count+1);
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save_count = count;
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}
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// const member function pointer
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{
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void (A_void_1::*fp)() const = &A_void_1::mem2;
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std::function<void (A_void_1)> r1(fp);
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A_void_1 a;
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r1(a);
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assert(count == save_count+1);
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save_count = count;
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std::function<void (A_void_1*)> r2(fp);
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A_void_1* ap = &a;
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r2(ap);
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assert(count == save_count+1);
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save_count = count;
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}
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}
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// 1 arg, return int
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int f_int_1(int i)
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{
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return i + 1;
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}
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struct A_int_1
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{
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A_int_1() : data_(5) {}
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int operator()(int i)
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{
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return i - 1;
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}
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int mem1() {return 3;}
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int mem2() const {return 4;}
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int data_;
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};
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void
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test_int_1()
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{
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// function
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{
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std::function<int (int)> r1(f_int_1);
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int i = 2;
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assert(r1(i) == 3);
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}
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// function pointer
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{
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int (*fp)(int) = f_int_1;
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std::function<int (int)> r1(fp);
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int i = 3;
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assert(r1(i) == 4);
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}
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// functor
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{
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A_int_1 a0;
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std::function<int (int)> r1(a0);
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int i = 4;
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assert(r1(i) == 3);
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}
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// member function pointer
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{
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int (A_int_1::*fp)() = &A_int_1::mem1;
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std::function<int (A_int_1)> r1(fp);
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A_int_1 a;
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assert(r1(a) == 3);
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std::function<int (A_int_1*)> r2(fp);
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A_int_1* ap = &a;
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assert(r2(ap) == 3);
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}
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// const member function pointer
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{
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int (A_int_1::*fp)() const = &A_int_1::mem2;
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std::function<int (A_int_1)> r1(fp);
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A_int_1 a;
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assert(r1(a) == 4);
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std::function<int (A_int_1*)> r2(fp);
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A_int_1* ap = &a;
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assert(r2(ap) == 4);
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}
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// member data pointer
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{
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int A_int_1::*fp = &A_int_1::data_;
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std::function<int& (A_int_1&)> r1(fp);
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A_int_1 a;
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assert(r1(a) == 5);
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r1(a) = 6;
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assert(r1(a) == 6);
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std::function<int& (A_int_1*)> r2(fp);
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A_int_1* ap = &a;
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assert(r2(ap) == 6);
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r2(ap) = 7;
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assert(r2(ap) == 7);
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}
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}
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// 2 arg, return void
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void f_void_2(int i, int j)
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{
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count += i+j;
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}
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struct A_void_2
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{
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void operator()(int i, int j)
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{
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count += i+j;
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}
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void mem1(int i) {count += i;}
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void mem2(int i) const {count += i;}
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};
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void
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test_void_2()
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{
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int save_count = count;
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// function
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{
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std::function<void (int, int)> r1(f_void_2);
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int i = 2;
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int j = 3;
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r1(i, j);
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assert(count == save_count+5);
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save_count = count;
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}
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// function pointer
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{
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void (*fp)(int, int) = f_void_2;
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std::function<void (int, int)> r1(fp);
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int i = 3;
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int j = 4;
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r1(i, j);
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assert(count == save_count+7);
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save_count = count;
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}
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// functor
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{
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A_void_2 a0;
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std::function<void (int, int)> r1(a0);
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int i = 4;
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int j = 5;
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r1(i, j);
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assert(count == save_count+9);
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save_count = count;
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}
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// member function pointer
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{
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void (A_void_2::*fp)(int) = &A_void_2::mem1;
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std::function<void (A_void_2, int)> r1(fp);
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A_void_2 a;
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int i = 3;
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r1(a, i);
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assert(count == save_count+3);
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save_count = count;
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std::function<void (A_void_2*, int)> r2(fp);
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A_void_2* ap = &a;
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r2(ap, i);
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assert(count == save_count+3);
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save_count = count;
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}
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// const member function pointer
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{
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void (A_void_2::*fp)(int) const = &A_void_2::mem2;
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std::function<void (A_void_2, int)> r1(fp);
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A_void_2 a;
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int i = 4;
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r1(a, i);
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assert(count == save_count+4);
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save_count = count;
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std::function<void (A_void_2*, int)> r2(fp);
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A_void_2* ap = &a;
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r2(ap, i);
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assert(count == save_count+4);
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save_count = count;
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}
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}
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// 2 arg, return int
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int f_int_2(int i, int j)
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{
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return i+j;
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}
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struct A_int_2
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{
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int operator()(int i, int j)
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{
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return i+j;
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}
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int mem1(int i) {return i+1;}
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int mem2(int i) const {return i+2;}
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};
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void test_int_2()
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{
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// function
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{
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std::function<int (int, int)> r1(f_int_2);
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int i = 2;
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int j = 3;
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assert(r1(i, j) == i+j);
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}
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// function pointer
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{
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int (*fp)(int, int) = f_int_2;
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std::function<int (int, int)> r1(fp);
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int i = 3;
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int j = 4;
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assert(r1(i, j) == i+j);
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}
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// functor
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{
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A_int_2 a0;
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std::function<int (int, int)> r1(a0);
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int i = 4;
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int j = 5;
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assert(r1(i, j) == i+j);
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}
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// member function pointer
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{
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int(A_int_2::*fp)(int) = &A_int_2::mem1;
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std::function<int (A_int_2, int)> r1(fp);
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A_int_2 a;
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int i = 3;
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assert(r1(a, i) == i+1);
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std::function<int (A_int_2*, int)> r2(fp);
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A_int_2* ap = &a;
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assert(r2(ap, i) == i+1);
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}
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// const member function pointer
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{
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int (A_int_2::*fp)(int) const = &A_int_2::mem2;
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std::function<int (A_int_2, int)> r1(fp);
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A_int_2 a;
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int i = 4;
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assert(r1(a, i) == i+2);
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std::function<int (A_int_2*, int)> r2(fp);
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A_int_2* ap = &a;
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assert(r2(ap, i) == i+2);
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}
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}
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int main()
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{
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test_void_0();
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test_int_0();
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test_void_1();
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test_int_1();
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test_void_2();
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test_int_2();
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}
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