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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "mozilla/Function.h"
using mozilla::function;
#define CHECK(c) \
do { \
bool cond = !!(c); \
MOZ_RELEASE_ASSERT(cond, "Failed assertion: " #c); \
} while (false)
struct ConvertibleToInt
{
operator int() const { return 42; }
};
int increment(int arg) { return arg + 1; }
struct S {
S() {}
static int increment(int arg) { return arg + 1; }
int decrement(int arg) { return arg - 1;}
int sum(int arg1, int arg2) const { return arg1 + arg2;}
};
struct Incrementor {
int operator()(int arg) { return arg + 1; }
};
static void
TestNonmemberFunction()
{
function<int(int)> f = &increment;
CHECK(f(42) == 43);
}
static void
TestStaticMemberFunction()
{
function<int(int)> f = &S::increment;
CHECK(f(42) == 43);
}
static void
TestFunctionObject()
{
function<int(int)> f = Incrementor();
CHECK(f(42) == 43);
}
static void
TestLambda()
{
// Test non-capturing lambda
function<int(int)> f = [](int arg){ return arg + 1; };
CHECK(f(42) == 43);
// Test capturing lambda
int one = 1;
function<int(int)> g = [one](int arg){ return arg + one; };
CHECK(g(42) == 43);
}
static void
TestDefaultConstructionAndAssignmentLater()
{
function<int(int)> f; // allowed
// Would get an assertion if we tried calling f now.
f = &increment;
CHECK(f(42) == 43);
}
static void
TestReassignment()
{
function<int(int)> f = &increment;
CHECK(f(42) == 43);
f = [](int arg){ return arg + 2; };
CHECK(f(42) == 44);
}
static void
TestMemberFunction()
{
function<int(S&, int)> f = &S::decrement;
S s;
CHECK((f(s, 1) == 0));
}
static void
TestConstMemberFunction()
{
function<int(const S*, int, int)> f = &S::sum;
const S s;
CHECK((f(&s, 1, 1) == 2));
}
int
main()
{
TestNonmemberFunction();
TestStaticMemberFunction();
TestFunctionObject();
TestLambda();
TestDefaultConstructionAndAssignmentLater();
TestReassignment();
TestMemberFunction();
TestConstMemberFunction();
return 0;
}
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