copy_assign.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
//
//===----------------------------------------------------------------------===//
// <valarray>
// template<class T> class valarray;
// valarray& operator=(const valarray& v);
#include <valarray>
#include <cassert>
#include <cstddef>
#include "test_macros.h"
struct S
{
S() : x_(0) { default_ctor_called = true; }
S(int x) : x_(x) {}
int x_;
static bool default_ctor_called;
};
bool S::default_ctor_called = false;
bool operator==(const S& lhs, const S& rhs)
{
return lhs.x_ == rhs.x_;
}
int main(int, char**)
{
{
typedef int T;
T a[] = {1, 2, 3, 4, 5};
const unsigned N = sizeof(a)/sizeof(a[0]);
std::valarray<T> v(a, N);
std::valarray<T> v2;
v2 = v;
assert(v2.size() == v.size());
for (std::size_t i = 0; i < v2.size(); ++i)
assert(v2[i] == v[i]);
}
{
typedef double T;
T a[] = {1, 2.5, 3, 4.25, 5};
const unsigned N = sizeof(a)/sizeof(a[0]);
std::valarray<T> v(a, N);
std::valarray<T> v2;
v2 = v;
assert(v2.size() == v.size());
for (std::size_t i = 0; i < v2.size(); ++i)
assert(v2[i] == v[i]);
}
{
typedef std::valarray<double> T;
T a[] = {T(1), T(2), T(3), T(4), T(5)};
const unsigned N = sizeof(a)/sizeof(a[0]);
std::valarray<T> v(a, N);
std::valarray<T> v2(a, N-2);
v2 = v;
assert(v2.size() == v.size());
for (unsigned i = 0; i < N; ++i)
{
assert(v2[i].size() == v[i].size());
for (std::size_t j = 0; j < v[i].size(); ++j)
assert(v2[i][j] == v[i][j]);
}
}
{
typedef S T;
T a[] = {T(1), T(2), T(3), T(4), T(5)};
const unsigned N = sizeof(a)/sizeof(a[0]);
std::valarray<T> v(a, N);
std::valarray<T> v2;
v2 = v;
assert(v2.size() == v.size());
for (std::size_t i = 0; i < v2.size(); ++i)
assert(v2[i] == v[i]);
assert(!S::default_ctor_called);
}
return 0;
}