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5088cf5194
absl::variant, and related types The corresponding headers are removed from cc files, but kept in headers to prevent breakages from transitive dependencies. PiperOrigin-RevId: 872421685 Change-Id: I867d4c3f7c9e422289c63816d44719b0530fb0a6
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// Copyright 2023 The Abseil Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/strings/has_ostream_operator.h"
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#include <optional>
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#include <ostream>
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#include <string>
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#include "gtest/gtest.h"
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namespace {
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struct TypeWithoutOstreamOp {};
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struct TypeWithOstreamOp {
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friend std::ostream& operator<<(std::ostream& os, const TypeWithOstreamOp&) {
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return os;
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}
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};
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TEST(HasOstreamOperatorTest, Works) {
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EXPECT_TRUE(absl::HasOstreamOperator<int>::value);
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EXPECT_TRUE(absl::HasOstreamOperator<std::string>::value);
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EXPECT_FALSE(absl::HasOstreamOperator<std::optional<int>>::value);
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EXPECT_FALSE(absl::HasOstreamOperator<TypeWithoutOstreamOp>::value);
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EXPECT_TRUE(absl::HasOstreamOperator<TypeWithOstreamOp>::value);
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}
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} // namespace
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