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