/*
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* Copyright (C) 2019 The Android Open Source Project
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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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* http://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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*/
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#ifndef ART_RUNTIME_VERIFIER_SCOPED_NEWLINE_H_
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#define ART_RUNTIME_VERIFIER_SCOPED_NEWLINE_H_
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#include <ostream>
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#include <android-base/logging.h>
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namespace art {
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namespace verifier {
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// RAII to inject a newline after a message.
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struct ScopedNewLine {
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explicit ScopedNewLine(std::ostream& os) : stream(os) {}
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ScopedNewLine(ScopedNewLine&& other) : stream(other.stream), active(other.active) {
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other.active = false;
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}
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ScopedNewLine(ScopedNewLine&) = delete;
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ScopedNewLine& operator=(ScopedNewLine&) = delete;
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~ScopedNewLine() {
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if (active) {
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stream << std::endl;
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}
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}
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template <class T>
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ScopedNewLine& operator<<(const T& t) {
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DCHECK(active);
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stream << t;
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return *this;
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}
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ScopedNewLine& operator<<(std::ostream& (*f)(std::ostream&)) {
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DCHECK(active);
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stream << f;
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return *this;
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}
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std::ostream& stream;
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bool active = true;
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};
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} // namespace verifier
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} // namespace art
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#endif // ART_RUNTIME_VERIFIER_SCOPED_NEWLINE_H_
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