Use upstream libaddressinput in Chrome.

third_party/libaddressinput/chromium/cpp/include/libaddressinput/util/internal/move.h

Index: third_party/libaddressinput/chromium/cpp/include/libaddressinput/util/internal/move.h
diff --git a/third_party/libaddressinput/chromium/cpp/include/libaddressinput/util/internal/move.h b/third_party/libaddressinput/chromium/cpp/include/libaddressinput/util/internal/move.h
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-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef I18N_ADDRESSINPUT_UTIL_INTERNAL_MOVE_H_
-#define I18N_ADDRESSINPUT_UTIL_INTERNAL_MOVE_H_
-
-// Macro with the boilerplate that makes a type move-only in C++03.
-//
-// USAGE
-//
-// This macro should be used instead of DISALLOW_COPY_AND_ASSIGN to create
-// a "move-only" type.  Unlike DISALLOW_COPY_AND_ASSIGN, this macro should be
-// the first line in a class declaration.
-//
-// A class using this macro must call .Pass() (or somehow be an r-value already)
-// before it can be:
-//
-//   * Passed as a function argument
-//   * Used as the right-hand side of an assignment
-//   * Returned from a function
-//
-// Each class will still need to define their own "move constructor" and "move
-// operator=" to make this useful.  Here's an example of the macro, the move
-// constructor, and the move operator= from the scoped_ptr class:
-//
-//  template <typename T>
-//  class scoped_ptr {
-//     MOVE_ONLY_TYPE_FOR_CPP_03(scoped_ptr, RValue)
-//   public:
-//    scoped_ptr(RValue& other) : ptr_(other.release()) { }
-//    scoped_ptr& operator=(RValue& other) {
-//      swap(other);
-//      return *this;
-//    }
-//  };
-//
-// Note that the constructor must NOT be marked explicit.
-//
-// For consistency, the second parameter to the macro should always be RValue
-// unless you have a strong reason to do otherwise.  It is only exposed as a
-// macro parameter so that the move constructor and move operator= don't look
-// like they're using a phantom type.
-//
-//
-// HOW THIS WORKS
-//
-// For a thorough explanation of this technique, see:
-//
-//   http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Move_Constructor
-//
-// The summary is that we take advantage of 2 properties:
-//
-//   1) non-const references will not bind to r-values.
-//   2) C++ can apply one user-defined conversion when initializing a
-//      variable.
-//
-// The first lets us disable the copy constructor and assignment operator
-// by declaring private version of them with a non-const reference parameter.
-//
-// For l-values, direct initialization still fails like in
-// DISALLOW_COPY_AND_ASSIGN because the copy constructor and assignment
-// operators are private.
-//
-// For r-values, the situation is different. The copy constructor and
-// assignment operator are not viable due to (1), so we are trying to call
-// a non-existent constructor and non-existing operator= rather than a private
-// one.  Since we have not committed an error quite yet, we can provide an
-// alternate conversion sequence and a constructor.  We add
-//
-//   * a private struct named "RValue"
-//   * a user-defined conversion "operator RValue()"
-//   * a "move constructor" and "move operator=" that take the RValue& as
-//     their sole parameter.
-//
-// Only r-values will trigger this sequence and execute our "move constructor"
-// or "move operator=."  L-values will match the private copy constructor and
-// operator= first giving a "private in this context" error.  This combination
-// gives us a move-only type.
-//
-// For signaling a destructive transfer of data from an l-value, we provide a
-// method named Pass() which creates an r-value for the current instance
-// triggering the move constructor or move operator=.
-//
-// Other ways to get r-values is to use the result of an expression like a
-// function call.
-//
-// Here's an example with comments explaining what gets triggered where:
-//
-//    class Foo {
-//      MOVE_ONLY_TYPE_FOR_CPP_03(Foo, RValue);
-//
-//     public:
-//       ... API ...
-//       Foo(RValue other);           // Move constructor.
-//       Foo& operator=(RValue rhs);  // Move operator=
-//    };
-//
-//    Foo MakeFoo();  // Function that returns a Foo.
-//
-//    Foo f;
-//    Foo f_copy(f);  // ERROR: Foo(Foo&) is private in this context.
-//    Foo f_assign;
-//    f_assign = f;   // ERROR: operator=(Foo&) is private in this context.
-//
-//
-//    Foo f(MakeFoo());      // R-value so alternate conversion executed.
-//    Foo f_copy(f.Pass());  // R-value so alternate conversion executed.
-//    f = f_copy.Pass();     // R-value so alternate conversion executed.
-//
-//
-// IMPLEMENTATION SUBTLETIES WITH RValue
-//
-// The RValue struct is just a container for a pointer back to the original
-// object. It should only ever be created as a temporary, and no external
-// class should ever declare it or use it in a parameter.
-//
-// It is tempting to want to use the RValue type in function parameters, but
-// excluding the limited usage here for the move constructor and move
-// operator=, doing so would mean that the function could take both r-values
-// and l-values equially which is unexpected.  See COMPARED To Boost.Move for
-// more details.
-//
-// An alternate, and incorrect, implementation of the RValue class used by
-// Boost.Move makes RValue a fieldless child of the move-only type. RValue&
-// is then used in place of RValue in the various operators.  The RValue& is
-// "created" by doing *reinterpret_cast<RValue*>(this).  This has the appeal
-// of never creating a temporary RValue struct even with optimizations
-// disabled.  Also, by virtue of inheritance you can treat the RValue
-// reference as if it were the move-only type itself.  Unfortunately,
-// using the result of this reinterpret_cast<> is actually undefined behavior
-// due to C++98 5.2.10.7. In certain compilers (e.g., NaCl) the optimizer
-// will generate non-working code.
-//
-// In optimized builds, both implementations generate the same assembly so we
-// choose the one that adheres to the standard.
-//
-//
-// WHY HAVE typedef void MoveOnlyTypeForCPP03
-//
-// Callback<>/Bind() needs to understand movable-but-not-copyable semantics
-// to call .Pass() appropriately when it is expected to transfer the value.
-// The cryptic typedef MoveOnlyTypeForCPP03 is added to make this check
-// easy and automatic in helper templates for Callback<>/Bind().
-// See IsMoveOnlyType template and its usage in base/callback_internal.h
-// for more details.
-//
-//
-// COMPARED TO C++11
-//
-// In C++11, you would implement this functionality using an r-value reference
-// and our .Pass() method would be replaced with a call to std::move().
-//
-// This emulation also has a deficiency where it uses up the single
-// user-defined conversion allowed by C++ during initialization.  This can
-// cause problems in some API edge cases.  For instance, in scoped_ptr, it is
-// impossible to make a function "void Foo(scoped_ptr<Parent> p)" accept a
-// value of type scoped_ptr<Child> even if you add a constructor to
-// scoped_ptr<> that would make it look like it should work.  C++11 does not
-// have this deficiency.
-//
-//
-// COMPARED TO Boost.Move
-//
-// Our implementation similar to Boost.Move, but we keep the RValue struct
-// private to the move-only type, and we don't use the reinterpret_cast<> hack.
-//
-// In Boost.Move, RValue is the boost::rv<> template.  This type can be used
-// when writing APIs like:
-//
-//   void MyFunc(boost::rv<Foo>& f)
-//
-// that can take advantage of rv<> to avoid extra copies of a type.  However you
-// would still be able to call this version of MyFunc with an l-value:
-//
-//   Foo f;
-//   MyFunc(f);  // Uh oh, we probably just destroyed |f| w/o calling Pass().
-//
-// unless someone is very careful to also declare a parallel override like:
-//
-//   void MyFunc(const Foo& f)
-//
-// that would catch the l-values first.  This was declared unsafe in C++11 and
-// a C++11 compiler will explicitly fail MyFunc(f).  Unfortunately, we cannot
-// ensure this in C++03.
-//
-// Since we have no need for writing such APIs yet, our implementation keeps
-// RValue private and uses a .Pass() method to do the conversion instead of
-// trying to write a version of "std::move()." Writing an API like std::move()
-// would require the RValue struct to be public.
-//
-//
-// CAVEATS
-//
-// If you include a move-only type as a field inside a class that does not
-// explicitly declare a copy constructor, the containing class's implicit
-// copy constructor will change from Containing(const Containing&) to
-// Containing(Containing&).  This can cause some unexpected errors.
-//
-//   http://llvm.org/bugs/show_bug.cgi?id=11528
-//
-// The workaround is to explicitly declare your copy constructor.
-//
-#define MOVE_ONLY_TYPE_FOR_CPP_03(type, rvalue_type) \
- private: \
-  struct rvalue_type { \
-    explicit rvalue_type(type* object) : object(object) {} \
-    type* object; \
-  }; \
-  type(type&); \
-  void operator=(type&); \
- public: \
-  operator rvalue_type() { return rvalue_type(this); } \
-  type Pass() { return type(rvalue_type(this)); } \
-  typedef void MoveOnlyTypeForCPP03; \
- private:
-
-#endif  // I18N_ADDRESSINPUT_UTIL_INTERNAL_MOVE_H_