Josh Haberman
3 years ago
commit
624d29d833
113 changed files with 2157 additions and 1707 deletions
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
|
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
|
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package com.google.protobuf; |
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import static java.lang.annotation.ElementType.METHOD; |
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import static java.lang.annotation.ElementType.TYPE; |
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import static java.lang.annotation.RetentionPolicy.CLASS; |
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import java.lang.annotation.Documented; |
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import java.lang.annotation.Retention; |
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import java.lang.annotation.Target; |
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/** |
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* Indicates that the return value of the annotated method can be safely ignored. |
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* |
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* <p>This is the opposite of {@link CheckReturnValue}. It can be used inside classes or packages |
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* annotated with {@code @CheckReturnValue} to exempt specific methods from the default. |
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*/ |
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@Documented |
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@Target({METHOD, TYPE}) |
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@Retention(CLASS) |
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@interface CanIgnoreReturnValue {} |
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@ -0,0 +1,55 @@ |
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
|
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// modification, are permitted provided that the following conditions are
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// met:
|
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
|
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
|
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// this software without specific prior written permission.
|
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package com.google.protobuf; |
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import static java.lang.annotation.ElementType.CONSTRUCTOR; |
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import static java.lang.annotation.ElementType.METHOD; |
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import static java.lang.annotation.ElementType.PACKAGE; |
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import static java.lang.annotation.ElementType.TYPE; |
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import static java.lang.annotation.RetentionPolicy.RUNTIME; |
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import java.lang.annotation.Documented; |
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import java.lang.annotation.Retention; |
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import java.lang.annotation.Target; |
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/** |
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* Indicates that the return value of the annotated method must be checked. An error is triggered |
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* when one of these methods is called but the result is not used. |
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* |
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* <p>{@code @CheckReturnValue} may be applied to a class or package to indicate that all methods in |
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* that class or package must have their return values checked. For convenience, we provide an |
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* annotation, {@link CanIgnoreReturnValue}, to exempt specific methods or classes from this |
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* behavior. |
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*/ |
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@Documented |
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@Target({METHOD, CONSTRUCTOR, TYPE, PACKAGE}) |
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@Retention(RUNTIME) |
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@interface CheckReturnValue {} |
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
|
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// modification, are permitted provided that the following conditions are
|
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// met:
|
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//
|
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// * Redistributions of source code must retain the above copyright
|
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// notice, this list of conditions and the following disclaimer.
|
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// * Redistributions in binary form must reproduce the above
|
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// copyright notice, this list of conditions and the following disclaimer
|
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// in the documentation and/or other materials provided with the
|
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// distribution.
|
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// * Neither the name of Google Inc. nor the names of its
|
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// contributors may be used to endorse or promote products derived from
|
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// this software without specific prior written permission.
|
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//
|
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef GOOGLE_PROTOBUF_EXPLICITLY_CONSTRUCTED_H__ |
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#define GOOGLE_PROTOBUF_EXPLICITLY_CONSTRUCTED_H__ |
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#include <stdint.h> |
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#include <utility> |
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#include <google/protobuf/stubs/logging.h> |
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#include <google/protobuf/stubs/common.h> |
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// clang-format off
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#include <google/protobuf/port_def.inc> |
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// clang-format on
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namespace google { |
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namespace protobuf { |
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namespace internal { |
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// Wraps a variable whose constructor and destructor are explicitly
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// called. It is particularly useful for a global variable, without its
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// constructor and destructor run on start and end of the program lifetime.
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// This circumvents the initial construction order fiasco, while keeping
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// the address of the empty string a compile time constant.
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//
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// Pay special attention to the initialization state of the object.
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// 1. The object is "uninitialized" to begin with.
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// 2. Call Construct() or DefaultConstruct() only if the object is
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// uninitialized. After the call, the object becomes "initialized".
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// 3. Call get() and get_mutable() only if the object is initialized.
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// 4. Call Destruct() only if the object is initialized.
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// After the call, the object becomes uninitialized.
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template <typename T> |
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class ExplicitlyConstructed { |
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public: |
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void DefaultConstruct() { new (&union_) T(); } |
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template <typename... Args> |
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void Construct(Args&&... args) { |
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new (&union_) T(std::forward<Args>(args)...); |
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} |
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void Destruct() { get_mutable()->~T(); } |
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constexpr const T& get() const { return reinterpret_cast<const T&>(union_); } |
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T* get_mutable() { return reinterpret_cast<T*>(&union_); } |
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private: |
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union AlignedUnion { |
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alignas(T) char space[sizeof(T)]; |
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int64_t align_to_int64; |
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void* align_to_ptr; |
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} union_; |
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}; |
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} // namespace internal
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} // namespace protobuf
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} // namespace google
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#include <google/protobuf/port_undef.inc> |
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#endif // GOOGLE_PROTOBUF_EXPLICITLY_CONSTRUCTED_H__
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