//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <functional>
// class function<R(ArgTypes...)>
// R operator()(ArgTypes... args) const
// This test runs in C++03, but we have deprecated using std::function in C++03.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX03_FUNCTION
// Address Sanitizer doesn't instrument weak symbols on Linux. When a key
// function is defined for bad_function_call's vtable, its typeinfo and vtable
// will be defined as strong symbols in the library and weak symbols in other
// translation units. Only the strong symbol will be instrumented, increasing
// its size (due to the redzone) and leading to a serious ODR violation
// resulting in a crash.
// Some relevant bugs:
// https://github.com/google/sanitizers/issues/1017
// https://github.com/google/sanitizers/issues/619
// https://github.com/google/sanitizers/issues/398
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68016
// UNSUPPORTED: asan
#include <functional>
#include <cassert>
#include "test_macros.h"
int count = 0;
// 0 args, return int
int f_int_0()
{
return 3;
}
struct A_int_0
{
int operator()() {return 4;}
};
void test_int_0()
{
// function
{
std::function<int ()> r1(f_int_0);
assert(r1() == 3);
}
// function pointer
{
int (*fp)() = f_int_0;
std::function<int ()> r1(fp);
assert(r1() == 3);
}
// functor
{
A_int_0 a0;
std::function<int ()> r1(a0);
assert(r1() == 4);
}
}
// 0 args, return void
void f_void_0()
{
++count;
}
struct A_void_0
{
void operator()() {++count;}
};
void
test_void_0()
{
int save_count = count;
// function
{
std::function<void ()> r1(f_void_0);
r1();
assert(count == save_count+1);
save_count = count;
}
// function pointer
{
void (*fp)() = f_void_0;
std::function<void ()> r1(fp);
r1();
assert(count == save_count+1);
save_count = count;
}
// functor
{
A_void_0 a0;
std::function<void ()> r1(a0);
r1();
assert(count == save_count+1);
save_count = count;
}
}
// 1 arg, return void
void f_void_1(int i)
{
count += i;
}
struct A_void_1
{
void operator()(int i)
{
count += i;
}
void mem1() {++count;}
void mem2() const {++count;}
};
void
test_void_1()
{
int save_count = count;
// function
{
std::function<void (int)> r1(f_void_1);
int i = 2;
r1(i);
assert(count == save_count+2);
save_count = count;
}
// function pointer
{
void (*fp)(int) = f_void_1;
std::function<void (int)> r1(fp);
int i = 3;
r1(i);
assert(count == save_count+3);
save_count = count;
}
// functor
{
A_void_1 a0;
std::function<void (int)> r1(a0);
int i = 4;
r1(i);
assert(count == save_count+4);
save_count = count;
}
// member function pointer
{
void (A_void_1::*fp)() = &A_void_1::mem1;
std::function<void (A_void_1)> r1(fp);
A_void_1 a;
r1(a);
assert(count == save_count+1);
save_count = count;
A_void_1* ap = &a;
std::function<void (A_void_1*)> r2 = fp;
r2(ap);
assert(count == save_count+1);
save_count = count;
}
// const member function pointer
{
void (A_void_1::*fp)() const = &A_void_1::mem2;
std::function<void (A_void_1)> r1(fp);
A_void_1 a;
r1(a);
assert(count == save_count+1);
save_count = count;
std::function<void (A_void_1*)> r2(fp);
A_void_1* ap = &a;
r2(ap);
assert(count == save_count+1);
save_count = count;
}
}
// 1 arg, return int
int f_int_1(int i)
{
return i + 1;
}
struct A_int_1
{
A_int_1() : data_(5) {}
int operator()(int i)
{
return i - 1;
}
int mem1() {return 3;}
int mem2() const {return 4;}
int data_;
};
void
test_int_1()
{
// function
{
std::function<int (int)> r1(f_int_1);
int i = 2;
assert(r1(i) == 3);
}
// function pointer
{
int (*fp)(int) = f_int_1;
std::function<int (int)> r1(fp);
int i = 3;
assert(r1(i) == 4);
}
// functor
{
A_int_1 a0;
std::function<int (int)> r1(a0);
int i = 4;
assert(r1(i) == 3);
}
// member function pointer
{
int (A_int_1::*fp)() = &A_int_1::mem1;
std::function<int (A_int_1)> r1(fp);
A_int_1 a;
assert(r1(a) == 3);
std::function<int (A_int_1*)> r2(fp);
A_int_1* ap = &a;
assert(r2(ap) == 3);
}
// const member function pointer
{
int (A_int_1::*fp)() const = &A_int_1::mem2;
std::function<int (A_int_1)> r1(fp);
A_int_1 a;
assert(r1(a) == 4);
std::function<int (A_int_1*)> r2(fp);
A_int_1* ap = &a;
assert(r2(ap) == 4);
}
// member data pointer
{
int A_int_1::*fp = &A_int_1::data_;
std::function<int& (A_int_1&)> r1(fp);
A_int_1 a;
assert(r1(a) == 5);
r1(a) = 6;
assert(r1(a) == 6);
std::function<int& (A_int_1*)> r2(fp);
A_int_1* ap = &a;
assert(r2(ap) == 6);
r2(ap) = 7;
assert(r2(ap) == 7);
}
}
// 2 arg, return void
void f_void_2(int i, int j)
{
count += i+j;
}
struct A_void_2
{
void operator()(int i, int j)
{
count += i+j;
}
void mem1(int i) {count += i;}
void mem2(int i) const {count += i;}
};
void
test_void_2()
{
int save_count = count;
// function
{
std::function<void (int, int)> r1(f_void_2);
int i = 2;
int j = 3;
r1(i, j);
assert(count == save_count+5);
save_count = count;
}
// function pointer
{
void (*fp)(int, int) = f_void_2;
std::function<void (int, int)> r1(fp);
int i = 3;
int j = 4;
r1(i, j);
assert(count == save_count+7);
save_count = count;
}
// functor
{
A_void_2 a0;
std::function<void (int, int)> r1(a0);
int i = 4;
int j = 5;
r1(i, j);
assert(count == save_count+9);
save_count = count;
}
// member function pointer
{
void (A_void_2::*fp)(int) = &A_void_2::mem1;
std::function<void (A_void_2, int)> r1(fp);
A_void_2 a;
int i = 3;
r1(a, i);
assert(count == save_count+3);
save_count = count;
std::function<void (A_void_2*, int)> r2(fp);
A_void_2* ap = &a;
r2(ap, i);
assert(count == save_count+3);
save_count = count;
}
// const member function pointer
{
void (A_void_2::*fp)(int) const = &A_void_2::mem2;
std::function<void (A_void_2, int)> r1(fp);
A_void_2 a;
int i = 4;
r1(a, i);
assert(count == save_count+4);
save_count = count;
std::function<void (A_void_2*, int)> r2(fp);
A_void_2* ap = &a;
r2(ap, i);
assert(count == save_count+4);
save_count = count;
}
}
// 2 arg, return int
int f_int_2(int i, int j)
{
return i+j;
}
struct A_int_2
{
int operator()(int i, int j)
{
return i+j;
}
int mem1(int i) {return i+1;}
int mem2(int i) const {return i+2;}
};
void test_int_2()
{
// function
{
std::function<int (int, int)> r1(f_int_2);
int i = 2;
int j = 3;
assert(r1(i, j) == i+j);
}
// function pointer
{
int (*fp)(int, int) = f_int_2;
std::function<int (int, int)> r1(fp);
int i = 3;
int j = 4;
assert(r1(i, j) == i+j);
}
// functor
{
A_int_2 a0;
std::function<int (int, int)> r1(a0);
int i = 4;
int j = 5;
assert(r1(i, j) == i+j);
}
// member function pointer
{
int(A_int_2::*fp)(int) = &A_int_2::mem1;
std::function<int (A_int_2, int)> r1(fp);
A_int_2 a;
int i = 3;
assert(r1(a, i) == i+1);
std::function<int (A_int_2*, int)> r2(fp);
A_int_2* ap = &a;
assert(r2(ap, i) == i+1);
}
// const member function pointer
{
int (A_int_2::*fp)(int) const = &A_int_2::mem2;
std::function<int (A_int_2, int)> r1(fp);
A_int_2 a;
int i = 4;
assert(r1(a, i) == i+2);
std::function<int (A_int_2*, int)> r2(fp);
A_int_2* ap = &a;
assert(r2(ap, i) == i+2);
}
}
int main(int, char**)
{
test_void_0();
test_int_0();
test_void_1();
test_int_1();
test_void_2();
test_int_2();
return 0;
}
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