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// Copyright 2022 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include "pw_polyfill/standard.h"
#if PW_CXX_STANDARD_IS_SUPPORTED(20)
#include <span>
#include "gtest/gtest.h"
#include "pw_span/span.h"
namespace {
constexpr int kCArray[5] = {0, 1, 2, 3, 4};
void TakesPwSpan(pw::span<const int>) {}
void TakesStdSpan(std::span<const int>) {}
TEST(SpanCompatibility, CallFunction) {
TakesPwSpan(std::span<const int>(kCArray));
TakesStdSpan(pw::span<const int>(kCArray));
}
TEST(SpanCompatibility, StdToPwConversions) {
std::span<const int> std_span(kCArray);
pw::span<const int> pw_span(std_span);
EXPECT_EQ(std_span.data(), pw_span.data());
EXPECT_EQ(std_span.size(), pw_span.size());
pw_span = std_span;
EXPECT_EQ(std_span.data(), pw_span.data());
EXPECT_EQ(std_span.size(), pw_span.size());
}
TEST(SpanCompatibility, PwToStdConversions) {
pw::span<const int> pw_span(kCArray);
std::span<const int> std_span(pw_span);
EXPECT_EQ(std_span.data(), pw_span.data());
EXPECT_EQ(std_span.size(), pw_span.size());
std_span = pw_span;
EXPECT_EQ(std_span.data(), pw_span.data());
EXPECT_EQ(std_span.size(), pw_span.size());
}
TEST(SpanCompatibility, SameArray) {
pw::span<const int> pw_span(kCArray);
std::span<const int> std_span(kCArray);
EXPECT_EQ(std_span.data(), pw_span.data());
EXPECT_EQ(std_span.size(), pw_span.size());
EXPECT_EQ(std_span[0], 0);
EXPECT_EQ(pw_span[0], 0);
EXPECT_EQ(std_span[4], 4);
EXPECT_EQ(pw_span[4], 4);
}
} // namespace
#endif // PW_CXX_STANDARD_IS_SUPPORTED(20)