ad87d5f23d
This refactor includes the following changes: - Refactor similar tests using `types::for_each` to remove redundant code; - Explicitly include the missing header `type_algorithms.h` in some test files; - Some tests scattered in different test functions with ad-hoc names (e.g., `test5()`, `test6()`) but belong to the same kind are now grouped into one function (`test_struct_array()`).
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template<InputIterator InIter, OutputIterator<auto, InIter::reference> OutIter>
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// constexpr OutIter // constexpr after C++17
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// copy_n(InIter first, InIter::difference_type n, OutIter result);
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#include <algorithm>
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#include <cassert>
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#include <vector>
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "type_algorithms.h"
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#include "user_defined_integral.h"
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typedef UserDefinedIntegral<unsigned> UDI;
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class PaddedBase {
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public:
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TEST_CONSTEXPR PaddedBase(std::int16_t a, std::int8_t b) : a_(a), b_(b) {}
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std::int16_t a_;
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std::int8_t b_;
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};
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class Derived : public PaddedBase {
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public:
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TEST_CONSTEXPR Derived(std::int16_t a, std::int8_t b, std::int8_t c) : PaddedBase(a, b), c_(c) {}
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std::int8_t c_;
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};
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struct TestIterators {
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template <class InIter>
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TEST_CONSTEXPR_CXX20 void operator()() {
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types::for_each(
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types::concatenate_t<types::cpp17_input_iterator_list<int*>, types::type_list<cpp17_output_iterator<int*> > >(),
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TestImpl<InIter>());
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}
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template <class InIter>
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struct TestImpl {
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template <class OutIter>
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TEST_CONSTEXPR_CXX20 void operator()() {
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const unsigned N = 1000;
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int ia[N] = {};
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for (unsigned i = 0; i < N; ++i)
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ia[i] = i;
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int ib[N] = {0};
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OutIter r = std::copy_n(InIter(ia), UDI(N / 2), OutIter(ib));
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assert(base(r) == ib + N / 2);
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for (unsigned i = 0; i < N / 2; ++i)
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assert(ia[i] == ib[i]);
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}
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};
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};
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TEST_CONSTEXPR_CXX20 bool test_vector_bool(std::size_t N) {
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std::vector<bool> in(N, false);
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for (std::size_t i = 0; i < N; i += 2)
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in[i] = true;
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{ // Test copy with aligned bytes
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std::vector<bool> out(N);
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std::copy_n(in.begin(), N, out.begin());
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assert(in == out);
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}
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{ // Test copy with unaligned bytes
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std::vector<bool> out(N + 8);
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std::copy_n(in.begin(), N, out.begin() + 4);
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for (std::size_t i = 0; i < N; ++i)
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assert(out[i + 4] == in[i]);
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}
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return true;
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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types::for_each(types::cpp17_input_iterator_list<const int*>(), TestIterators());
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{ // Make sure that padding bits aren't copied
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Derived src(1, 2, 3);
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Derived dst(4, 5, 6);
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std::copy_n(static_cast<PaddedBase*>(&src), 1, static_cast<PaddedBase*>(&dst));
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assert(dst.a_ == 1);
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assert(dst.b_ == 2);
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assert(dst.c_ == 6);
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}
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{ // Make sure that overlapping ranges can be copied
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int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
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std::copy_n(a + 3, 7, a);
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int expected[] = {4, 5, 6, 7, 8, 9, 10, 8, 9, 10};
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assert(std::equal(a, a + 10, expected));
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}
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{ // Test vector<bool>::iterator optimization
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assert(test_vector_bool(8));
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assert(test_vector_bool(19));
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assert(test_vector_bool(32));
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assert(test_vector_bool(49));
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assert(test_vector_bool(64));
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assert(test_vector_bool(199));
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assert(test_vector_bool(256));
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}
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return true;
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}
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int main(int, char**) {
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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