forked from mirrors/gecko-dev
142 lines
3.6 KiB
C++
142 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Assertions.h"
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#include "mozilla/FunctionRef.h"
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#include "mozilla/UniquePtr.h"
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#define CHECK(c) \
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do { \
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bool cond = !!(c); \
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MOZ_RELEASE_ASSERT(cond, "Failed assertion: " #c); \
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} while (false)
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int addConstRefs(const int& arg1, const int& arg2) { return arg1 + arg2; }
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void incrementPointer(int* arg) { (*arg)++; }
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int increment(int arg) { return arg + 1; }
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int incrementUnique(mozilla::UniquePtr<int> ptr) { return *ptr + 1; }
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static bool helloWorldCalled = false;
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void helloWorld() { helloWorldCalled = true; }
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struct S {
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static int increment(int arg) { return arg + 1; }
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};
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struct Incrementor {
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int operator()(int arg) { return arg + 1; }
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};
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static void TestNonmemberFunction() {
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mozilla::FunctionRef<int(int)> f(&increment);
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CHECK(f(42) == 43);
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}
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static void TestStaticMemberFunction() {
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mozilla::FunctionRef<int(int)> f(&S::increment);
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CHECK(f(42) == 43);
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}
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static void TestFunctionObject() {
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auto incrementor = Incrementor();
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mozilla::FunctionRef<int(int)> f(incrementor);
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CHECK(f(42) == 43);
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}
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static void TestLambda() {
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// Test non-capturing lambda
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auto lambda1 = [](int arg) { return arg + 1; };
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mozilla::FunctionRef<int(int)> f(lambda1);
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CHECK(f(42) == 43);
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// Test capturing lambda
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int one = 1;
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auto lambda2 = [one](int arg) { return arg + one; };
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mozilla::FunctionRef<int(int)> g(lambda2);
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CHECK(g(42) == 43);
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mozilla::FunctionRef<int(int)> h([](int arg) { return arg + 1; });
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CHECK(h(42) == 43);
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}
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static void TestOperatorBool() {
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mozilla::FunctionRef<int(int)> f1;
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CHECK(!static_cast<bool>(f1));
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mozilla::FunctionRef<int(int)> f2 = increment;
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CHECK(static_cast<bool>(f2));
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mozilla::FunctionRef<int(int)> f3 = nullptr;
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CHECK(!static_cast<bool>(f3));
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}
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static void TestReferenceParameters() {
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mozilla::FunctionRef<int(const int&, const int&)> f = &addConstRefs;
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int x = 1;
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int y = 2;
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CHECK(f(x, y) == 3);
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}
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static void TestVoidNoParameters() {
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mozilla::FunctionRef<void()> f = &helloWorld;
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CHECK(!helloWorldCalled);
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f();
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CHECK(helloWorldCalled);
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}
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static void TestPointerParameters() {
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mozilla::FunctionRef<void(int*)> f = &incrementPointer;
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int x = 1;
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f(&x);
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CHECK(x == 2);
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}
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static void TestImplicitFunctorTypeConversion() {
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auto incrementor = Incrementor();
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mozilla::FunctionRef<long(short)> f = incrementor;
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short x = 1;
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CHECK(f(x) == 2);
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}
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static void TestImplicitLambdaTypeConversion() {
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mozilla::FunctionRef<long(short)> f = [](short arg) { return arg + 1; };
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short x = 1;
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CHECK(f(x) == 2);
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}
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static void TestImplicitFunctionPointerTypeConversion() {
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mozilla::FunctionRef<long(short)> f = &increment;
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short x = 1;
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CHECK(f(x) == 2);
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}
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static void TestMoveOnlyArguments() {
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mozilla::FunctionRef<int(mozilla::UniquePtr<int>)> f(&incrementUnique);
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CHECK(f(mozilla::MakeUnique<int>(5)) == 6);
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}
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int main() {
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TestNonmemberFunction();
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TestStaticMemberFunction();
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TestFunctionObject();
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TestLambda();
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TestOperatorBool();
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TestReferenceParameters();
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TestPointerParameters();
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TestVoidNoParameters();
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TestImplicitFunctorTypeConversion();
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TestImplicitLambdaTypeConversion();
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TestImplicitFunctionPointerTypeConversion();
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TestMoveOnlyArguments();
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printf("TestFunctionRef OK!\n");
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return 0;
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}
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