Make the fuchsia mojo/public repo the source of truth.

mojo/public/cpp/bindings/type_converter.h

-// Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_TYPE_CONVERTER_H_
-#define MOJO_PUBLIC_CPP_BINDINGS_TYPE_CONVERTER_H_
-
-namespace mojo {
-
-// Specialize the following class:
-//   template <typename T, typename U> struct TypeConverter;
-// to perform type conversion for Mojom-defined structs and arrays. Here, T is
-// the target type; U is the input type.
-//
-// Specializations should implement the following interfaces:
-//   namespace mojo {
-//   template <>
-//   struct TypeConverter<X, Y> {
-//     static X Convert(const Y& input);
-//   };
-//   template <>
-//   struct TypeConverter<Y, X> {
-//     static Y Convert(const X& input);
-//   };
-//   }
-//
-// EXAMPLE:
-//
-// Suppose you have the following Mojom-defined struct:
-//
-//   module geometry {
-//   struct Point {
-//     int32 x;
-//     int32 y;
-//   };
-//   }
-//
-// Now, imagine you wanted to write a TypeConverter specialization for
-// gfx::Point. It might look like this:
-//
-//   namespace mojo {
-//   template <>
-//   struct TypeConverter<geometry::PointPtr, gfx::Point> {
-//     static geometry::PointPtr Convert(const gfx::Point& input) {
-//       geometry::PointPtr result;
-//       result->x = input.x();
-//       result->y = input.y();
-//       return result;
-//     }
-//   };
-//   template <>
-//   struct TypeConverter<gfx::Point, geometry::PointPtr> {
-//     static gfx::Point Convert(const geometry::PointPtr& input) {
-//       return input ? gfx::Point(input->x, input->y) : gfx::Point();
-//     }
-//   };
-//   }
-//
-// With the above TypeConverter defined, it is possible to write code like this:
-//
-//   void AcceptPoint(const geometry::PointPtr& input) {
-//     // With an explicit cast using the .To<> method.
-//     gfx::Point pt = input.To<gfx::Point>();
-//
-//     // With an explicit cast using the static From() method.
-//     geometry::PointPtr output = geometry::Point::From(pt);
-//
-//     // Inferring the input type using the ConvertTo helper function.
-//     gfx::Point pt2 = ConvertTo<gfx::Point>(input);
-//   }
-//
-template <typename T, typename U>
-struct TypeConverter;
-
-// The following specialization is useful when you are converting between
-// Array<POD> and std::vector<POD>.
-template <typename T>
-struct TypeConverter<T, T> {
-  static T Convert(const T& obj) { return obj; }
-};
-
-// The following helper function is useful for shorthand. The compiler can infer
-// the input type, so you can write:
-//   OutputType out = ConvertTo<OutputType>(input);
-template <typename T, typename U>
-inline T ConvertTo(const U& obj) {
-  return TypeConverter<T, U>::Convert(obj);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_BINDINGS_TYPE_CONVERTER_H_