//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <forward_list>
// void splice_after(const_iterator p, forward_list&& x,
// const_iterator first, const_iterator last);
#include <stddef.h>
#include <forward_list>
#include <cassert>
#include <iterator>
#include "test_macros.h"
#include "min_allocator.h"
typedef std::ptrdiff_t T;
const T t1[] = {0, 1, 2, 3, 4, 5, 6, 7};
const T t2[] = {10, 11, 12, 13, 14, 15};
const std::ptrdiff_t size_t1 = std::end(t1) - std::begin(t1);
const std::ptrdiff_t size_t2 = std::end(t2) - std::begin(t2);
template <class C>
void
testd(const C& c, std::ptrdiff_t p, ptrdiff_t f, ptrdiff_t l)
{
typename C::const_iterator i = c.begin();
std::ptrdiff_t n1 = 0;
for (; n1 < p; ++n1, ++i)
assert(*i == t1[n1]);
for (std::ptrdiff_t n2 = f; n2 < l-1; ++n2, ++i)
assert(*i == t2[n2]);
for (; n1 < size_t1; ++n1, ++i)
assert(*i == t1[n1]);
assert(std::distance(c.begin(), c.end()) == size_t1 + (l > f+1 ? l-1-f : 0));
}
template <class C>
void
tests(const C& c, std::ptrdiff_t p, ptrdiff_t f, ptrdiff_t l)
{
typename C::const_iterator i = c.begin();
std::ptrdiff_t n = 0;
std::ptrdiff_t d = l > f+1 ? l-1-f : 0;
if (d == 0 || p == f)
{
for (n = 0; n < size_t1; ++n, ++i)
assert(*i == t1[n]);
}
else if (p < f)
{
for (n = 0; n < p; ++n, ++i)
assert(*i == t1[n]);
for (n = f; n < l-1; ++n, ++i)
assert(*i == t1[n]);
for (n = p; n < f; ++n, ++i)
assert(*i == t1[n]);
for (n = l-1; n < size_t1; ++n, ++i)
assert(*i == t1[n]);
}
else // p > f
{
for (n = 0; n < f; ++n, ++i)
assert(*i == t1[n]);
for (n = l-1; n < p; ++n, ++i)
assert(*i == t1[n]);
for (n = f; n < l-1; ++n, ++i)
assert(*i == t1[n]);
for (n = p; n < size_t1; ++n, ++i)
assert(*i == t1[n]);
}
assert(std::distance(c.begin(), c.end()) == size_t1);
}
int main(int, char**)
{
{
// splicing different containers
typedef std::forward_list<T> C;
for (std::ptrdiff_t f = 0; f <= size_t2+1; ++f)
{
for (std::ptrdiff_t l = f; l <= size_t2+1; ++l)
{
for (std::ptrdiff_t p = 0; p <= size_t1; ++p)
{
C c1(std::begin(t1), std::end(t1));
C c2(std::begin(t2), std::end(t2));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c2),
std::next(c2.cbefore_begin(), f), std::next(c2.cbefore_begin(), l));
testd(c1, p, f, l);
}
}
}
// splicing within same container
for (std::ptrdiff_t f = 0; f <= size_t1+1; ++f)
{
for (std::ptrdiff_t l = f; l <= size_t1; ++l)
{
for (std::ptrdiff_t p = 0; p <= f; ++p)
{
C c1(std::begin(t1), std::end(t1));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c1),
std::next(c1.cbefore_begin(), f), std::next(c1.cbefore_begin(), l));
tests(c1, p, f, l);
}
for (std::ptrdiff_t p = l; p <= size_t1; ++p)
{
C c1(std::begin(t1), std::end(t1));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c1),
std::next(c1.cbefore_begin(), f), std::next(c1.cbefore_begin(), l));
tests(c1, p, f, l);
}
}
}
}
#if TEST_STD_VER >= 11
{
// splicing different containers
typedef std::forward_list<T, min_allocator<T>> C;
for (std::ptrdiff_t f = 0; f <= size_t2+1; ++f)
{
for (std::ptrdiff_t l = f; l <= size_t2+1; ++l)
{
for (std::ptrdiff_t p = 0; p <= size_t1; ++p)
{
C c1(std::begin(t1), std::end(t1));
C c2(std::begin(t2), std::end(t2));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c2),
std::next(c2.cbefore_begin(), f), std::next(c2.cbefore_begin(), l));
testd(c1, p, f, l);
}
}
}
// splicing within same container
for (std::ptrdiff_t f = 0; f <= size_t1+1; ++f)
{
for (std::ptrdiff_t l = f; l <= size_t1; ++l)
{
for (std::ptrdiff_t p = 0; p <= f; ++p)
{
C c1(std::begin(t1), std::end(t1));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c1),
std::next(c1.cbefore_begin(), f), std::next(c1.cbefore_begin(), l));
tests(c1, p, f, l);
}
for (std::ptrdiff_t p = l; p <= size_t1; ++p)
{
C c1(std::begin(t1), std::end(t1));
c1.splice_after(std::next(c1.cbefore_begin(), p), std::move(c1),
std::next(c1.cbefore_begin(), f), std::next(c1.cbefore_begin(), l));
tests(c1, p, f, l);
}
}
}
}
#endif
return 0;
}