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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <list>
// template <class Pred> void remove_if(Pred pred); // before C++20
// template <class Pred> size_type remove_if(Pred pred); // c++20 and later
#include <list>
#include <cassert>
#include <functional>
#include "test_macros.h"
#include "min_allocator.h"
#include "counting_predicates.h"
bool even(int i)
{
return i % 2 == 0;
}
bool g(int i)
{
return i < 3;
}
struct PredLWG526 {
PredLWG526 (int i) : i_(i) {};
~PredLWG526() { i_ = -32767; }
bool operator() (const PredLWG526 &p) const { return p.i_ == i_; }
bool operator==(int i) const { return i == i_;}
int i_;
};
typedef unary_counting_predicate<bool(*)(int), int> Predicate;
int main(int, char**)
{
{
int a1[] = {1, 2, 3, 4};
int a2[] = {3, 4};
typedef std::list<int> L;
L c(a1, a1+4);
Predicate cp(g);
#if TEST_STD_VER > 17
ASSERT_SAME_TYPE(L::size_type, decltype(c.remove_if(std::ref(cp))));
assert(c.remove_if(std::ref(cp)) == 2);
#else
ASSERT_SAME_TYPE(void, decltype(c.remove_if(std::ref(cp))));
c.remove_if(std::ref(cp));
#endif
assert(c == std::list<int>(a2, a2+2));
assert(cp.count() == 4);
}
{
int a1[] = {1, 2, 3, 4};
int a2[] = {1, 3};
std::list<int> c(a1, a1+4);
Predicate cp(even);
#if TEST_STD_VER > 17
assert(c.remove_if(std::ref(cp)) == 2);
#else
c.remove_if(std::ref(cp));
#endif
assert(c == std::list<int>(a2, a2+2));
assert(cp.count() == 4);
}
{ // LWG issue #526
int a1[] = {1, 2, 1, 3, 5, 8, 11};
int a2[] = {2, 3, 5, 8, 11};
std::list<PredLWG526> c(a1, a1 + 7);
c.remove_if(std::ref(c.front()));
assert(c.size() == 5);
for (size_t i = 0; i < c.size(); ++i)
{
assert(c.front() == a2[i]);
c.pop_front();
}
}
#if TEST_STD_VER >= 11
{
int a1[] = {1, 2, 3, 4};
int a2[] = {3, 4};
std::list<int, min_allocator<int>> c(a1, a1+4);
Predicate cp(g);
#if TEST_STD_VER > 17
assert(c.remove_if(std::ref(cp)) == 2);
#else
c.remove_if(std::ref(cp));
#endif
assert((c == std::list<int, min_allocator<int>>(a2, a2+2)));
assert(cp.count() == 4);
}
#endif
return 0;
}
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