chromium/third_party/blink/renderer/bindings/core/v8/idl_types_base.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_IDL_TYPES_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_IDL_TYPES_BASE_H_

namespace blink {

// This is the base type for all Web IDL types, such as the ones defined in
// idl_types.h. It is defined in a separate location to avoid circular header
// inclusions when one only needs to check if a type inherits from IDLBase.
struct IDLBase { … };

// If a child class returns a simple type known at the time it is declared, it
// can inherit from IDLBaseHelper to avoid having to set ImplType on its own.
//
// Example:
// struct IDLDouble final : public IDLBaseHelper<double> {};
template <typename T>
struct IDLBaseHelper : public IDLBase { … };

// An utility type trait to convert an IDL type (e.g. IDLLong,
// ScriptWrappable's subclasses) to a Blink implementation type (e.g. int32_t,
// ScriptWrappable's subclasses themselves).
template <typename IDLType>
struct IDLTypeToBlinkImplType { … };
IDLTypeToBlinkImplType<IDLType>;

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_IDL_TYPES_BASE_H_