mirror of
https://github.com/microsoft/GSL.git
synced 2024-11-03 17:56:43 -05:00
2b51b8767a
This patch adds support for std::unique_ptr and std::shared_ptr to the gsl::span class instead of having to manually grab the pointer via get(). For reference, this is part of the following issue: https://github.com/Microsoft/GSL/issues/402
1452 lines
37 KiB
C++
1452 lines
37 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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//
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// This code is licensed under the MIT License (MIT).
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <UnitTest++/UnitTest++.h>
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#include <gsl/span>
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#include <iostream>
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#include <list>
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#include <regex>
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using namespace std;
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using namespace gsl;
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namespace
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{
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struct BaseClass
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{
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};
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struct DerivedClass : BaseClass
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{
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};
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}
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SUITE(span_tests)
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{
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TEST(default_constructor)
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{
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{
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span<int> s;
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int> cs;
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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span<int, 0> s;
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int, 0> cs;
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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#ifdef CONFIRM_COMPILATION_ERRORS
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span<int, 1> s;
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CHECK(s.length() == 1 && s.data() == nullptr); // explains why it can't compile
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#endif
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}
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{
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span<int> s{};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int> cs{};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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}
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TEST(size_optimization)
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{
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{
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span<int> s;
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CHECK(sizeof(s) == sizeof(int*) + sizeof(ptrdiff_t));
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}
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{
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span<int, 0> s;
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CHECK(sizeof(s) == sizeof(int*));
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}
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}
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TEST(from_nullptr_constructor)
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{
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{
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span<int> s = nullptr;
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int> cs = nullptr;
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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span<int, 0> s = nullptr;
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int, 0> cs = nullptr;
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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#ifdef CONFIRM_COMPILATION_ERRORS
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span<int, 1> s = nullptr;
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CHECK(s.length() == 1 && s.data() == nullptr); // explains why it can't compile
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#endif
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}
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{
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span<int> s{nullptr};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int> cs{nullptr};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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span<int*> s{nullptr};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int*> cs{nullptr};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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}
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TEST(from_nullptr_length_constructor)
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{
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{
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span<int> s{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int> cs{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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span<int, 0> s{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int, 0> cs{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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{
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auto workaround_macro = []() { span<int, 1> s{ nullptr, static_cast<span<int>::index_type>(0) }; };
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CHECK_THROW(workaround_macro(), fail_fast);
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}
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{
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auto workaround_macro = []() { span<int> s{nullptr, 1}; };
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CHECK_THROW(workaround_macro(), fail_fast);
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auto const_workaround_macro = []() { span<const int> cs{nullptr, 1}; };
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CHECK_THROW(const_workaround_macro(), fail_fast);
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}
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{
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auto workaround_macro = []() { span<int, 0> s{nullptr, 1}; };
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CHECK_THROW(workaround_macro(), fail_fast);
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auto const_workaround_macro = []() { span<const int, 0> s{nullptr, 1}; };
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CHECK_THROW(const_workaround_macro(), fail_fast);
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}
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{
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span<int*> s{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(s.length() == 0 && s.data() == nullptr);
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span<const int*> cs{nullptr, static_cast<span<int>::index_type>(0)};
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CHECK(cs.length() == 0 && cs.data() == nullptr);
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}
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}
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TEST(from_pointer_length_constructor)
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{
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int arr[4] = {1, 2, 3, 4};
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{
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span<int> s{&arr[0], 2};
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CHECK(s.length() == 2 && s.data() == &arr[0]);
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CHECK(s[0] == 1 && s[1] == 2);
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}
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{
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span<int, 2> s{&arr[0], 2};
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CHECK(s.length() == 2 && s.data() == &arr[0]);
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CHECK(s[0] == 1 && s[1] == 2);
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}
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{
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int* p = nullptr;
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span<int> s{p, static_cast<span<int>::index_type>(0)};
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CHECK(s.length() == 0 && s.data() == nullptr);
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}
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{
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int* p = nullptr;
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auto workaround_macro = [=]() { span<int> s{p, 2}; };
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CHECK_THROW(workaround_macro(), fail_fast);
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}
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}
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TEST(from_pointer_pointer_constructor)
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{
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int arr[4] = {1, 2, 3, 4};
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{
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span<int> s{&arr[0], &arr[2]};
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CHECK(s.length() == 2 && s.data() == &arr[0]);
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CHECK(s[0] == 1 && s[1] == 2);
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}
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{
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span<int, 2> s{&arr[0], &arr[2]};
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CHECK(s.length() == 2 && s.data() == &arr[0]);
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CHECK(s[0] == 1 && s[1] == 2);
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}
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{
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span<int> s{&arr[0], &arr[0]};
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CHECK(s.length() == 0 && s.data() == &arr[0]);
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}
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{
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span<int, 0> s{&arr[0], &arr[0]};
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CHECK(s.length() == 0 && s.data() == &arr[0]);
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}
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// this will fail the std::distance() precondition, which asserts on MSVC debug builds
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//{
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// auto workaround_macro = [&]() { span<int> s{&arr[1], &arr[0]}; };
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// CHECK_THROW(workaround_macro(), fail_fast);
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//}
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// this will fail the std::distance() precondition, which asserts on MSVC debug builds
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//{
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// int* p = nullptr;
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// auto workaround_macro = [&]() { span<int> s{&arr[0], p}; };
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// CHECK_THROW(workaround_macro(), fail_fast);
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//}
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{
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int* p = nullptr;
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span<int> s{ p, p };
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CHECK(s.length() == 0 && s.data() == nullptr);
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}
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{
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int* p = nullptr;
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span<int, 0> s{ p, p };
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CHECK(s.length() == 0 && s.data() == nullptr);
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}
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// this will fail the std::distance() precondition, which asserts on MSVC debug builds
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//{
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// int* p = nullptr;
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// auto workaround_macro = [&]() { span<int> s{&arr[0], p}; };
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// CHECK_THROW(workaround_macro(), fail_fast);
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//}
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}
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TEST(from_array_constructor)
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{
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int arr[5] = {1, 2, 3, 4, 5};
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{
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span<int> s{arr};
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CHECK(s.length() == 5 && s.data() == &arr[0]);
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}
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{
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span<int, 5> s{arr};
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CHECK(s.length() == 5 && s.data() == &arr[0]);
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}
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int arr2d[2][3] = { 1, 2, 3, 4, 5, 6 };
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#ifdef CONFIRM_COMPILATION_ERRORS
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{
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span<int, 6> s{arr};
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}
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{
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span<int, 0> s{arr};
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CHECK(s.length() == 0 && s.data() == &arr[0]);
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}
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{
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span<int> s{arr2d};
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CHECK(s.length() == 6 && s.data() == &arr2d[0][0]);
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CHECK(s[0] == 1 && s[5] == 6);
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}
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{
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span<int, 0> s{arr2d};
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CHECK(s.length() == 0 && s.data() == &arr2d[0][0]);
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}
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{
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span<int, 6> s{ arr2d };
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}
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#endif
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{
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span<int[3]> s{ &(arr2d[0]), 1 };
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CHECK(s.length() == 1 && s.data() == &arr2d[0]);
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}
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int arr3d[2][3][2] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};
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#ifdef CONFIRM_COMPILATION_ERRORS
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{
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span<int> s{arr3d};
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CHECK(s.length() == 12 && s.data() == &arr3d[0][0][0]);
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CHECK(s[0] == 1 && s[11] == 12);
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}
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{
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span<int, 0> s{arr3d};
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CHECK(s.length() == 0 && s.data() == &arr3d[0][0][0]);
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}
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{
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span<int, 11> s{arr3d};
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}
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{
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span<int, 12> s{arr3d};
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CHECK(s.length() == 12 && s.data() == &arr3d[0][0][0]);
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CHECK(s[0] == 1 && s[5] == 6);
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}
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#endif
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{
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span<int[3][2]> s{&arr3d[0], 1};
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CHECK(s.length() == 1 && s.data() == &arr3d[0]);
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}
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}
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TEST(from_dynamic_array_constructor)
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{
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double(*arr)[3][4] = new double[100][3][4];
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{
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span<double> s(&arr[0][0][0], 10);
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CHECK(s.length() == 10 && s.data() == &arr[0][0][0]);
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}
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delete[] arr;
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}
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TEST(from_std_array_constructor)
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{
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std::array<int, 4> arr = {1, 2, 3, 4};
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{
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span<int> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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span<const int> cs{arr};
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CHECK(cs.size() == narrow_cast<ptrdiff_t>(arr.size()) && cs.data() == arr.data());
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}
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{
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span<int, 4> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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span<const int, 4> cs{arr};
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CHECK(cs.size() == narrow_cast<ptrdiff_t>(arr.size()) && cs.data() == arr.data());
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}
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#ifdef CONFIRM_COMPILATION_ERRORS
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{
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span<int, 2> s{arr};
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CHECK(s.size() == 2 && s.data() == arr.data());
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span<const int, 2> cs{arr};
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CHECK(cs.size() == 2 && cs.data() == arr.data());
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}
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{
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span<int, 0> s{arr};
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CHECK(s.size() == 0 && s.data() == arr.data());
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span<const int, 0> cs{arr};
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CHECK(cs.size() == 0 && cs.data() == arr.data());
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}
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{
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span<int, 5> s{arr};
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}
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{
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auto get_an_array = []()->std::array<int, 4> { return{1, 2, 3, 4}; };
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auto take_a_span = [](span<int> s) { static_cast<void>(s); };
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// try to take a temporary std::array
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take_a_span(get_an_array());
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}
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#endif
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{
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auto get_an_array = []() -> std::array<int, 4> { return { 1, 2, 3, 4 }; };
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auto take_a_span = [](span<const int> s) { static_cast<void>(s); };
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// try to take a temporary std::array
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take_a_span(get_an_array());
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}
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}
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TEST(from_const_std_array_constructor)
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{
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const std::array<int, 4> arr = {1, 2, 3, 4};
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{
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span<const int> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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}
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{
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span<const int, 4> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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}
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#ifdef CONFIRM_COMPILATION_ERRORS
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{
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span<const int, 2> s{arr};
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CHECK(s.size() == 2 && s.data() == arr.data());
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}
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{
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span<const int, 0> s{arr};
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CHECK(s.size() == 0 && s.data() == arr.data());
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}
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{
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span<const int, 5> s{arr};
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}
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#endif
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{
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auto get_an_array = []() -> const std::array<int, 4> { return {1, 2, 3, 4}; };
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auto take_a_span = [](span<const int> s) { static_cast<void>(s); };
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// try to take a temporary std::array
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take_a_span(get_an_array());
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}
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}
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TEST(from_std_array_const_constructor)
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{
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std::array<const int, 4> arr = {1, 2, 3, 4};
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{
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span<const int> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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}
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{
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span<const int, 4> s{arr};
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CHECK(s.size() == narrow_cast<ptrdiff_t>(arr.size()) && s.data() == arr.data());
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}
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#ifdef CONFIRM_COMPILATION_ERRORS
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{
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span<const int, 2> s{arr};
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CHECK(s.size() == 2 && s.data() == arr.data());
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}
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{
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span<const int, 0> s{arr};
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CHECK(s.size() == 0 && s.data() == arr.data());
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}
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{
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span<const int, 5> s{arr};
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}
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{
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span<int, 4> s{arr};
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}
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#endif
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}
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TEST(from_unique_pointer_construction)
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{
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{
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auto ptr = std::make_unique<int>(4);
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{
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span<int> s{ptr};
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CHECK(s.length() == 1 && s.data() == ptr.get());
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CHECK(s[0] == 4);
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}
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}
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{
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auto ptr = std::unique_ptr<int>{nullptr};
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{
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span<int> s{ptr};
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CHECK(s.length() == 0 && s.data() == nullptr);
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}
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}
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{
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auto arr = std::make_unique<int[]>(4);
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for (auto i = 0; i < 4; i++)
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arr[i] = i + 1;
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{
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span<int> s{arr, 4};
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CHECK(s.length() == 4 && s.data() == arr.get());
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CHECK(s[0] == 1 && s[1] == 2);
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}
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}
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{
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auto ptr = std::unique_ptr<int[]>{nullptr};
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{
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span<int> s{ptr, 0};
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CHECK(s.length() == 0 && s.data() == nullptr);
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}
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}
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}
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TEST(from_shared_pointer_construction)
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{
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{
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auto ptr = std::make_shared<int>(4);
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{
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span<int> s{ptr};
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CHECK(s.length() == 1 && s.data() == ptr.get());
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CHECK(s[0] == 4);
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}
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}
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{
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auto ptr = std::shared_ptr<int>{nullptr};
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|
|
{
|
|
span<int> s{ptr};
|
|
CHECK(s.length() == 0 && s.data() == nullptr);
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(from_container_constructor)
|
|
{
|
|
std::vector<int> v = {1, 2, 3};
|
|
const std::vector<int> cv = v;
|
|
|
|
{
|
|
span<int> s{v};
|
|
CHECK(s.size() == narrow_cast<std::ptrdiff_t>(v.size()) && s.data() == v.data());
|
|
|
|
span<const int> cs{v};
|
|
CHECK(cs.size() == narrow_cast<std::ptrdiff_t>(v.size()) && cs.data() == v.data());
|
|
}
|
|
|
|
std::string str = "hello";
|
|
const std::string cstr = "hello";
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
span<char> s{str};
|
|
CHECK(s.size() == narrow_cast<std::ptrdiff_t>(str.size()) && s.data() == str.data());
|
|
#endif
|
|
span<const char> cs{str};
|
|
CHECK(cs.size() == narrow_cast<std::ptrdiff_t>(str.size()) && cs.data() == str.data());
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
span<char> s{cstr};
|
|
#endif
|
|
span<const char> cs{cstr};
|
|
CHECK(cs.size() == narrow_cast<std::ptrdiff_t>(cstr.size()) &&
|
|
cs.data() == cstr.data());
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
auto get_temp_vector = []() -> std::vector<int> { return {}; };
|
|
auto use_span = [](span<int> s) { static_cast<void>(s); };
|
|
use_span(get_temp_vector());
|
|
#endif
|
|
}
|
|
|
|
{
|
|
auto get_temp_vector = []() -> std::vector<int> { return{}; };
|
|
auto use_span = [](span<const int> s) { static_cast<void>(s); };
|
|
use_span(get_temp_vector());
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
auto get_temp_string = []() -> std::string { return{}; };
|
|
auto use_span = [](span<char> s) { static_cast<void>(s); };
|
|
use_span(get_temp_string());
|
|
#endif
|
|
}
|
|
|
|
{
|
|
auto get_temp_string = []() -> std::string { return {}; };
|
|
auto use_span = [](span<const char> s) { static_cast<void>(s); };
|
|
use_span(get_temp_string());
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
auto get_temp_vector = []() -> const std::vector<int> { return {}; };
|
|
auto use_span = [](span<const char> s) { static_cast<void>(s); };
|
|
use_span(get_temp_vector());
|
|
#endif
|
|
}
|
|
|
|
{
|
|
auto get_temp_string = []() -> const std::string { return {}; };
|
|
auto use_span = [](span<const char> s) { static_cast<void>(s); };
|
|
use_span(get_temp_string());
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
std::map<int, int> m;
|
|
span<int> s{m};
|
|
#endif
|
|
}
|
|
}
|
|
|
|
TEST(from_convertible_span_constructor)
|
|
{
|
|
{
|
|
span<DerivedClass> avd;
|
|
span<const DerivedClass> avcd = avd;
|
|
static_cast<void>(avcd);
|
|
}
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
span<DerivedClass> avd;
|
|
span<BaseClass> avb = avd;
|
|
static_cast<void>(avb);
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
{
|
|
span<int> s;
|
|
span<unsigned int> s2 = s;
|
|
static_cast<void>(s2);
|
|
}
|
|
|
|
{
|
|
span<int> s;
|
|
span<const unsigned int> s2 = s;
|
|
static_cast<void>(s2);
|
|
}
|
|
|
|
{
|
|
span<int> s;
|
|
span<short> s2 = s;
|
|
static_cast<void>(s2);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
TEST(copy_move_and_assignment)
|
|
{
|
|
span<int> s1;
|
|
CHECK(s1.empty());
|
|
|
|
int arr[] = {3, 4, 5};
|
|
|
|
span<const int> s2 = arr;
|
|
CHECK(s2.length() == 3 && s2.data() == &arr[0]);
|
|
|
|
s2 = s1;
|
|
CHECK(s2.empty());
|
|
|
|
auto get_temp_span = [&]() -> span<int> { return {&arr[1], 2}; };
|
|
auto use_span = [&](span<const int> s) { CHECK(s.length() == 2 && s.data() == &arr[1]); };
|
|
use_span(get_temp_span());
|
|
|
|
s1 = get_temp_span();
|
|
CHECK(s1.length() == 2 && s1.data() == &arr[1]);
|
|
}
|
|
|
|
TEST(first)
|
|
{
|
|
int arr[5] = {1, 2, 3, 4, 5};
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.first<2>().length() == 2);
|
|
CHECK(av.first(2).length() == 2);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.first<0>().length() == 0);
|
|
CHECK(av.first(0).length() == 0);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.first<5>().length() == 5);
|
|
CHECK(av.first(5).length() == 5);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
CHECK(av.first<6>().length() == 6);
|
|
CHECK(av.first<-1>().length() == -1);
|
|
#endif
|
|
CHECK_THROW(av.first(6).length(), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int> av;
|
|
CHECK(av.first<0>().length() == 0);
|
|
CHECK(av.first(0).length() == 0);
|
|
}
|
|
}
|
|
|
|
TEST(last)
|
|
{
|
|
int arr[5] = {1, 2, 3, 4, 5};
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.last<2>().length() == 2);
|
|
CHECK(av.last(2).length() == 2);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.last<0>().length() == 0);
|
|
CHECK(av.last(0).length() == 0);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.last<5>().length() == 5);
|
|
CHECK(av.last(5).length() == 5);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
CHECK(av.last<6>().length() == 6);
|
|
#endif
|
|
CHECK_THROW(av.last(6).length(), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int> av;
|
|
CHECK(av.last<0>().length() == 0);
|
|
CHECK(av.last(0).length() == 0);
|
|
}
|
|
}
|
|
|
|
TEST(subspan)
|
|
{
|
|
int arr[5] = {1, 2, 3, 4, 5};
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK((av.subspan<2, 2>().length() == 2));
|
|
CHECK(av.subspan(2, 2).length() == 2);
|
|
CHECK(av.subspan(2, 3).length() == 3);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK((av.subspan<0, 0>().length() == 0));
|
|
CHECK(av.subspan(0, 0).length() == 0);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK((av.subspan<0, 5>().length() == 5));
|
|
CHECK(av.subspan(0, 5).length() == 5);
|
|
CHECK_THROW(av.subspan(0, 6).length(), fail_fast);
|
|
CHECK_THROW(av.subspan(1, 5).length(), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK((av.subspan<4, 0>().length() == 0));
|
|
CHECK(av.subspan(4, 0).length() == 0);
|
|
CHECK(av.subspan(5, 0).length() == 0);
|
|
CHECK_THROW(av.subspan(6, 0).length(), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int> av;
|
|
CHECK((av.subspan<0, 0>().length() == 0));
|
|
CHECK(av.subspan(0, 0).length() == 0);
|
|
CHECK_THROW((av.subspan<1, 0>().length()), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int> av;
|
|
CHECK(av.subspan(0).length() == 0);
|
|
CHECK_THROW(av.subspan(1).length(), fail_fast);
|
|
}
|
|
|
|
{
|
|
span<int> av = arr;
|
|
CHECK(av.subspan(0).length() == 5);
|
|
CHECK(av.subspan(1).length() == 4);
|
|
CHECK(av.subspan(4).length() == 1);
|
|
CHECK(av.subspan(5).length() == 0);
|
|
CHECK_THROW(av.subspan(6).length(), fail_fast);
|
|
auto av2 = av.subspan(1);
|
|
for (int i = 0; i < 4; ++i) CHECK(av2[i] == i + 2);
|
|
}
|
|
|
|
{
|
|
span<int, 5> av = arr;
|
|
CHECK(av.subspan(0).length() == 5);
|
|
CHECK(av.subspan(1).length() == 4);
|
|
CHECK(av.subspan(4).length() == 1);
|
|
CHECK(av.subspan(5).length() == 0);
|
|
CHECK_THROW(av.subspan(6).length(), fail_fast);
|
|
auto av2 = av.subspan(1);
|
|
for (int i = 0; i < 4; ++i) CHECK(av2[i] == i + 2);
|
|
}
|
|
}
|
|
|
|
TEST(at_call)
|
|
{
|
|
int arr[4] = {1, 2, 3, 4};
|
|
|
|
{
|
|
span<int> s = arr;
|
|
CHECK(s.at(0) == 1);
|
|
CHECK_THROW(s.at(5), fail_fast);
|
|
}
|
|
|
|
{
|
|
int arr2d[2] = {1, 6};
|
|
span<int, 2> s = arr2d;
|
|
CHECK(s.at(0) == 1);
|
|
CHECK(s.at(1) == 6);
|
|
CHECK_THROW(s.at(2) ,fail_fast);
|
|
}
|
|
}
|
|
|
|
TEST(operator_function_call)
|
|
{
|
|
int arr[4] = {1, 2, 3, 4};
|
|
|
|
{
|
|
span<int> s = arr;
|
|
CHECK(s(0) == 1);
|
|
CHECK_THROW(s(5), fail_fast);
|
|
}
|
|
|
|
{
|
|
int arr2d[2] = {1, 6};
|
|
span<int, 2> s = arr2d;
|
|
CHECK(s(0) == 1);
|
|
CHECK(s(1) == 6);
|
|
CHECK_THROW(s(2) ,fail_fast);
|
|
}
|
|
}
|
|
|
|
TEST(iterator_default_init)
|
|
{
|
|
span<int>::iterator it1;
|
|
span<int>::iterator it2;
|
|
CHECK(it1 == it2);
|
|
}
|
|
|
|
TEST(const_iterator_default_init)
|
|
{
|
|
span<int>::const_iterator it1;
|
|
span<int>::const_iterator it2;
|
|
CHECK(it1 == it2);
|
|
}
|
|
|
|
TEST(iterator_conversions)
|
|
{
|
|
span<int>::iterator badIt;
|
|
span<int>::const_iterator badConstIt;
|
|
CHECK(badIt == badConstIt);
|
|
|
|
int a[] = { 1, 2, 3, 4 };
|
|
span<int> s = a;
|
|
|
|
auto it = s.begin();
|
|
auto cit = s.cbegin();
|
|
|
|
CHECK(it == cit);
|
|
CHECK(cit == it);
|
|
|
|
span<int>::const_iterator cit2 = it;
|
|
CHECK(cit2 == cit);
|
|
|
|
span<int>::const_iterator cit3 = it + 4;
|
|
CHECK(cit3 == s.cend());
|
|
}
|
|
|
|
TEST(iterator_comparisons)
|
|
{
|
|
int a[] = { 1, 2, 3, 4 };
|
|
{
|
|
span<int> s = a;
|
|
span<int>::iterator it = s.begin();
|
|
auto it2 = it + 1;
|
|
span<int>::const_iterator cit = s.cbegin();
|
|
|
|
CHECK(it == cit);
|
|
CHECK(cit == it);
|
|
CHECK(it == it);
|
|
CHECK(cit == cit);
|
|
CHECK(cit == s.begin());
|
|
CHECK(s.begin() == cit);
|
|
CHECK(s.cbegin() == cit);
|
|
CHECK(it == s.begin());
|
|
CHECK(s.begin() == it);
|
|
|
|
CHECK(it != it2);
|
|
CHECK(it2 != it);
|
|
CHECK(it != s.end());
|
|
CHECK(it2 != s.end());
|
|
CHECK(s.end() != it);
|
|
CHECK(it2 != cit);
|
|
CHECK(cit != it2);
|
|
|
|
CHECK(it < it2);
|
|
CHECK(it <= it2);
|
|
CHECK(it2 <= s.end());
|
|
CHECK(it < s.end());
|
|
CHECK(it <= cit);
|
|
CHECK(cit <= it);
|
|
CHECK(cit < it2);
|
|
CHECK(cit <= it2);
|
|
CHECK(cit < s.end());
|
|
CHECK(cit <= s.end());
|
|
|
|
CHECK(it2 > it);
|
|
CHECK(it2 >= it);
|
|
CHECK(s.end() > it2);
|
|
CHECK(s.end() >= it2);
|
|
CHECK(it2 > cit);
|
|
CHECK(it2 >= cit);
|
|
}
|
|
}
|
|
|
|
TEST(begin_end)
|
|
{
|
|
{
|
|
int a[] = { 1, 2, 3, 4 };
|
|
span<int> s = a;
|
|
|
|
span<int>::iterator it = s.begin();
|
|
span<int>::iterator it2 = std::begin(s);
|
|
CHECK(it == it2);
|
|
|
|
it = s.end();
|
|
it2 = std::end(s);
|
|
CHECK(it == it2);
|
|
}
|
|
|
|
{
|
|
int a[] = { 1, 2, 3, 4 };
|
|
span<int> s = a;
|
|
|
|
auto it = s.begin();
|
|
auto first = it;
|
|
CHECK(it == first);
|
|
CHECK(*it == 1);
|
|
|
|
auto beyond = s.end();
|
|
CHECK(it != beyond);
|
|
CHECK_THROW(*beyond, fail_fast);
|
|
|
|
CHECK(beyond - first == 4);
|
|
CHECK(first - first == 0);
|
|
CHECK(beyond - beyond == 0);
|
|
|
|
++it;
|
|
CHECK(it - first == 1);
|
|
CHECK(*it == 2);
|
|
*it = 22;
|
|
CHECK(*it == 22);
|
|
CHECK(beyond - it == 3);
|
|
|
|
it = first;
|
|
CHECK(it == first);
|
|
while (it != s.end())
|
|
{
|
|
*it = 5;
|
|
++it;
|
|
}
|
|
|
|
CHECK(it == beyond);
|
|
CHECK(it - beyond == 0);
|
|
|
|
for (auto& n : s)
|
|
{
|
|
CHECK(n == 5);
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(cbegin_cend)
|
|
{
|
|
{
|
|
int a[] = { 1, 2, 3, 4 };
|
|
span<int> s = a;
|
|
|
|
span<int>::const_iterator cit = s.cbegin();
|
|
span<int>::const_iterator cit2 = std::cbegin(s);
|
|
CHECK(cit == cit2);
|
|
|
|
cit = s.cend();
|
|
cit2 = std::cend(s);
|
|
CHECK(cit == cit2);
|
|
}
|
|
|
|
{
|
|
int a[] = {1, 2, 3, 4};
|
|
span<int> s = a;
|
|
|
|
auto it = s.cbegin();
|
|
auto first = it;
|
|
CHECK(it == first);
|
|
CHECK(*it == 1);
|
|
|
|
auto beyond = s.cend();
|
|
CHECK(it != beyond);
|
|
CHECK_THROW(*beyond, fail_fast);
|
|
|
|
CHECK(beyond - first == 4);
|
|
CHECK(first - first == 0);
|
|
CHECK(beyond - beyond == 0);
|
|
|
|
++it;
|
|
CHECK(it - first == 1);
|
|
CHECK(*it == 2);
|
|
CHECK(beyond - it == 3);
|
|
|
|
int last = 0;
|
|
it = first;
|
|
CHECK(it == first);
|
|
while (it != s.cend())
|
|
{
|
|
CHECK(*it == last + 1);
|
|
|
|
last = *it;
|
|
++it;
|
|
}
|
|
|
|
CHECK(it == beyond);
|
|
CHECK(it - beyond == 0);
|
|
}
|
|
}
|
|
|
|
TEST(rbegin_rend)
|
|
{
|
|
{
|
|
int a[] = {1, 2, 3, 4};
|
|
span<int> s = a;
|
|
|
|
auto it = s.rbegin();
|
|
auto first = it;
|
|
CHECK(it == first);
|
|
CHECK(*it == 4);
|
|
|
|
auto beyond = s.rend();
|
|
CHECK(it != beyond);
|
|
CHECK_THROW(*beyond, fail_fast);
|
|
|
|
CHECK(beyond - first == 4);
|
|
CHECK(first - first == 0);
|
|
CHECK(beyond - beyond == 0);
|
|
|
|
++it;
|
|
CHECK(it - first == 1);
|
|
CHECK(*it == 3);
|
|
*it = 22;
|
|
CHECK(*it == 22);
|
|
CHECK(beyond - it == 3);
|
|
|
|
it = first;
|
|
CHECK(it == first);
|
|
while (it != s.rend())
|
|
{
|
|
*it = 5;
|
|
++it;
|
|
}
|
|
|
|
CHECK(it == beyond);
|
|
CHECK(it - beyond == 0);
|
|
|
|
for (auto& n : s)
|
|
{
|
|
CHECK(n == 5);
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST(crbegin_crend)
|
|
{
|
|
{
|
|
int a[] = {1, 2, 3, 4};
|
|
span<int> s = a;
|
|
|
|
auto it = s.crbegin();
|
|
auto first = it;
|
|
CHECK(it == first);
|
|
CHECK(*it == 4);
|
|
|
|
auto beyond = s.crend();
|
|
CHECK(it != beyond);
|
|
CHECK_THROW(*beyond, fail_fast);
|
|
|
|
CHECK(beyond - first == 4);
|
|
CHECK(first - first == 0);
|
|
CHECK(beyond - beyond == 0);
|
|
|
|
++it;
|
|
CHECK(it - first == 1);
|
|
CHECK(*it == 3);
|
|
CHECK(beyond - it == 3);
|
|
|
|
it = first;
|
|
CHECK(it == first);
|
|
int last = 5;
|
|
while (it != s.crend())
|
|
{
|
|
CHECK(*it == last - 1);
|
|
last = *it;
|
|
|
|
++it;
|
|
}
|
|
|
|
CHECK(it == beyond);
|
|
CHECK(it - beyond == 0);
|
|
}
|
|
}
|
|
|
|
TEST(comparison_operators)
|
|
{
|
|
{
|
|
span<int> s1 = nullptr;
|
|
span<int> s2 = nullptr;
|
|
CHECK(s1 == s2);
|
|
CHECK(!(s1 != s2));
|
|
CHECK(!(s1 < s2));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s1 >= s2);
|
|
CHECK(s2 == s1);
|
|
CHECK(!(s2 != s1));
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s2 <= s1);
|
|
CHECK(!(s2 > s1));
|
|
CHECK(s2 >= s1);
|
|
}
|
|
|
|
{
|
|
int arr[] = {2, 1};
|
|
span<int> s1 = arr;
|
|
span<int> s2 = arr;
|
|
|
|
CHECK(s1 == s2);
|
|
CHECK(!(s1 != s2));
|
|
CHECK(!(s1 < s2));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s1 >= s2);
|
|
CHECK(s2 == s1);
|
|
CHECK(!(s2 != s1));
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s2 <= s1);
|
|
CHECK(!(s2 > s1));
|
|
CHECK(s2 >= s1);
|
|
}
|
|
|
|
{
|
|
int arr[] = {2, 1}; // bigger
|
|
|
|
span<int> s1 = nullptr;
|
|
span<int> s2 = arr;
|
|
|
|
CHECK(s1 != s2);
|
|
CHECK(s2 != s1);
|
|
CHECK(!(s1 == s2));
|
|
CHECK(!(s2 == s1));
|
|
CHECK(s1 < s2);
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s2 <= s1));
|
|
CHECK(s2 > s1);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s2 >= s1);
|
|
CHECK(!(s1 >= s2));
|
|
}
|
|
|
|
{
|
|
int arr1[] = {1, 2};
|
|
int arr2[] = {1, 2};
|
|
span<int> s1 = arr1;
|
|
span<int> s2 = arr2;
|
|
|
|
CHECK(s1 == s2);
|
|
CHECK(!(s1 != s2));
|
|
CHECK(!(s1 < s2));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s1 >= s2);
|
|
CHECK(s2 == s1);
|
|
CHECK(!(s2 != s1));
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s2 <= s1);
|
|
CHECK(!(s2 > s1));
|
|
CHECK(s2 >= s1);
|
|
}
|
|
|
|
{
|
|
int arr[] = {1, 2, 3};
|
|
|
|
span<int> s1 = {&arr[0], 2}; // shorter
|
|
span<int> s2 = arr; // longer
|
|
|
|
CHECK(s1 != s2);
|
|
CHECK(s2 != s1);
|
|
CHECK(!(s1 == s2));
|
|
CHECK(!(s2 == s1));
|
|
CHECK(s1 < s2);
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s2 <= s1));
|
|
CHECK(s2 > s1);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s2 >= s1);
|
|
CHECK(!(s1 >= s2));
|
|
}
|
|
|
|
{
|
|
int arr1[] = {1, 2}; // smaller
|
|
int arr2[] = {2, 1}; // bigger
|
|
|
|
span<int> s1 = arr1;
|
|
span<int> s2 = arr2;
|
|
|
|
CHECK(s1 != s2);
|
|
CHECK(s2 != s1);
|
|
CHECK(!(s1 == s2));
|
|
CHECK(!(s2 == s1));
|
|
CHECK(s1 < s2);
|
|
CHECK(!(s2 < s1));
|
|
CHECK(s1 <= s2);
|
|
CHECK(!(s2 <= s1));
|
|
CHECK(s2 > s1);
|
|
CHECK(!(s1 > s2));
|
|
CHECK(s2 >= s1);
|
|
CHECK(!(s1 >= s2));
|
|
}
|
|
}
|
|
|
|
TEST(as_bytes)
|
|
{
|
|
int a[] = {1, 2, 3, 4};
|
|
|
|
{
|
|
span<const int> s = a;
|
|
CHECK(s.length() == 4);
|
|
span<const byte> bs = as_bytes(s);
|
|
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
|
|
CHECK(bs.length() == s.length_bytes());
|
|
}
|
|
|
|
{
|
|
span<int> s;
|
|
auto bs = as_bytes(s);
|
|
CHECK(bs.length() == s.length());
|
|
CHECK(bs.length() == 0);
|
|
CHECK(bs.size_bytes() == 0);
|
|
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
|
|
CHECK(bs.data() == nullptr);
|
|
}
|
|
|
|
{
|
|
span<int> s = a;
|
|
auto bs = as_bytes(s);
|
|
CHECK(static_cast<const void*>(bs.data()) == static_cast<const void*>(s.data()));
|
|
CHECK(bs.length() == s.length_bytes());
|
|
}
|
|
}
|
|
|
|
TEST(as_writeable_bytes)
|
|
{
|
|
int a[] = {1, 2, 3, 4};
|
|
|
|
{
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
// you should not be able to get writeable bytes for const objects
|
|
span<const int> s = a;
|
|
CHECK(s.length() == 4);
|
|
span<const byte> bs = as_writeable_bytes(s);
|
|
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
|
|
CHECK(bs.length() == s.length_bytes());
|
|
#endif
|
|
}
|
|
|
|
{
|
|
span<int> s;
|
|
auto bs = as_writeable_bytes(s);
|
|
CHECK(bs.length() == s.length());
|
|
CHECK(bs.length() == 0);
|
|
CHECK(bs.size_bytes() == 0);
|
|
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
|
|
CHECK(bs.data() == nullptr);
|
|
}
|
|
|
|
{
|
|
span<int> s = a;
|
|
auto bs = as_writeable_bytes(s);
|
|
CHECK(static_cast<void*>(bs.data()) == static_cast<void*>(s.data()));
|
|
CHECK(bs.length() == s.length_bytes());
|
|
}
|
|
}
|
|
|
|
TEST(fixed_size_conversions)
|
|
{
|
|
int arr[] = {1, 2, 3, 4};
|
|
|
|
// converting to an span from an equal size array is ok
|
|
span<int, 4> s4 = arr;
|
|
CHECK(s4.length() == 4);
|
|
|
|
// converting to dynamic_range is always ok
|
|
{
|
|
span<int> s = s4;
|
|
CHECK(s.length() == s4.length());
|
|
static_cast<void>(s);
|
|
}
|
|
|
|
// initialization or assignment to static span that REDUCES size is NOT ok
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
{
|
|
span<int, 2> s = arr;
|
|
}
|
|
{
|
|
span<int, 2> s2 = s4;
|
|
static_cast<void>(s2);
|
|
}
|
|
#endif
|
|
|
|
// even when done dynamically
|
|
{
|
|
span<int> s = arr;
|
|
auto f = [&]() {
|
|
span<int, 2> s2 = s;
|
|
static_cast<void>(s2);
|
|
};
|
|
CHECK_THROW(f(), fail_fast);
|
|
}
|
|
|
|
// but doing so explicitly is ok
|
|
|
|
// you can convert statically
|
|
{
|
|
span<int, 2> s2 = {arr, 2};
|
|
static_cast<void>(s2);
|
|
}
|
|
{
|
|
span<int, 1> s1 = s4.first<1>();
|
|
static_cast<void>(s1);
|
|
}
|
|
|
|
// ...or dynamically
|
|
{
|
|
// NB: implicit conversion to span<int,1> from span<int>
|
|
span<int, 1> s1 = s4.first(1);
|
|
static_cast<void>(s1);
|
|
}
|
|
|
|
// initialization or assignment to static span that requires size INCREASE is not ok.
|
|
int arr2[2] = {1, 2};
|
|
|
|
#ifdef CONFIRM_COMPILATION_ERRORS
|
|
{
|
|
span<int, 4> s3 = arr2;
|
|
}
|
|
{
|
|
span<int, 2> s2 = arr2;
|
|
span<int, 4> s4a = s2;
|
|
}
|
|
#endif
|
|
{
|
|
auto f = [&]() {
|
|
span<int, 4> _s4 = {arr2, 2};
|
|
static_cast<void>(_s4);
|
|
};
|
|
CHECK_THROW(f(), fail_fast);
|
|
}
|
|
|
|
// this should fail - we are trying to assign a small dynamic span to a fixed_size larger one
|
|
span<int> av = arr2;
|
|
auto f = [&]() {
|
|
span<int, 4> _s4 = av;
|
|
static_cast<void>(_s4);
|
|
};
|
|
CHECK_THROW(f(), fail_fast);
|
|
}
|
|
|
|
TEST(interop_with_std_regex)
|
|
{
|
|
char lat[] = { '1', '2', '3', '4', '5', '6', 'E', 'F', 'G' };
|
|
span<char> s = lat;
|
|
auto f_it = s.begin() + 7;
|
|
|
|
std::match_results<span<char>::iterator> match;
|
|
|
|
std::regex_match(s.begin(), s.end(), match, std::regex(".*"));
|
|
CHECK(match.ready());
|
|
CHECK(!match.empty());
|
|
CHECK(match[0].matched);
|
|
CHECK(match[0].first == s.begin());
|
|
CHECK(match[0].second == s.end());
|
|
|
|
std::regex_search(s.begin(), s.end(), match, std::regex("F"));
|
|
CHECK(match.ready());
|
|
CHECK(!match.empty());
|
|
CHECK(match[0].matched);
|
|
CHECK(match[0].first == f_it);
|
|
CHECK(match[0].second == (f_it + 1));
|
|
}
|
|
|
|
TEST(interop_with_gsl_at)
|
|
{
|
|
int arr[5] = {1, 2, 3, 4, 5};
|
|
span<int> s{arr};
|
|
CHECK(at(s,0) == 1 && at(s,1) == 2);
|
|
}
|
|
}
|
|
|
|
int main(int, const char* []) { return UnitTest::RunAllTests(); }
|