// Copyright 2022 The Abseil 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. // // ----------------------------------------------------------------------------- // File: log/internal/nullguard.h // ----------------------------------------------------------------------------- // // NullGuard exists such that NullGuard<T>::Guard(v) returns v, unless passed a // nullptr_t, or a null char* or const char*, in which case it returns "(null)". // This allows streaming NullGuard<T>::Guard(v) to an output stream without // hitting undefined behavior for null values.
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