copy.pass.cpp
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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
//
//===----------------------------------------------------------------------===//
// <deque>
// Optimization for deque::iterators
// template <class InputIterator, class OutputIterator>
// OutputIterator
// copy(InputIterator first, InputIterator last, OutputIterator result);
#include <deque>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "min_allocator.h"
template <class C>
C
make(int size, int start = 0 )
{
const int b = 4096 / sizeof(int);
int init = 0;
if (start > 0)
{
init = (start+1) / b + ((start+1) % b != 0);
init *= b;
--init;
}
C c(init, 0);
for (int i = 0; i < init-start; ++i)
c.pop_back();
for (int i = 0; i < size; ++i)
c.push_back(i);
for (int i = 0; i < start; ++i)
c.pop_front();
return c;
}
template <class C>
void testN(int start, int N)
{
typedef typename C::iterator I;
typedef typename C::const_iterator CI;
typedef random_access_iterator<I> RAI;
typedef random_access_iterator<CI> RACI;
typedef input_iterator<CI> ICI;
C c1 = make<C>(N, start);
C c2 = make<C>(N);
assert(std::copy(c1.cbegin(), c1.cend(), c2.begin()) == c2.end());
assert(c1 == c2);
assert(std::copy(c2.cbegin(), c2.cend(), c1.begin()) == c1.end());
assert(c1 == c2);
assert(std::copy(c1.cbegin(), c1.cend(), RAI(c2.begin())) == RAI(c2.end()));
assert(c1 == c2);
assert(std::copy(c2.cbegin(), c2.cend(), RAI(c1.begin())) == RAI(c1.end()));
assert(c1 == c2);
assert(std::copy(RACI(c1.cbegin()), RACI(c1.cend()), c2.begin()) == c2.end());
assert(c1 == c2);
assert(std::copy(ICI(c2.cbegin()), ICI(c2.cend()), c1.begin()) == c1.end());
assert(c1 == c2);
}
int main(int, char**)
{
{
int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
const int N = sizeof(rng)/sizeof(rng[0]);
for (int i = 0; i < N; ++i)
for (int j = 0; j < N; ++j)
testN<std::deque<int> >(rng[i], rng[j]);
}
#if TEST_STD_VER >= 11
{
int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
const int N = sizeof(rng)/sizeof(rng[0]);
for (int i = 0; i < N; ++i)
for (int j = 0; j < N; ++j)
testN<std::deque<int, min_allocator<int>> >(rng[i], rng[j]);
}
#endif
return 0;
}