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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DDLoggedTypeTraits_h_
#define DDLoggedTypeTraits_h_
#include <type_traits>
namespace mozilla {
// Templated struct carrying compile-time information about C++ types that may
// log messages (including about their lifetime and links to other objects.)
// Classes should declare a specialization by using one of the macros below.
template <typename T>
struct DDLoggedTypeTraits;
#define DDLoggedTypeName(TYPE) \
template <> \
struct DDLoggedTypeTraits<TYPE> { \
using Type = TYPE; \
static constexpr const char* Name() { return #TYPE; } \
using HasBase = std::false_type; \
using BaseType = TYPE; \
static constexpr const char* BaseTypeName() { return ""; } \
}
#define DDLoggedTypeNameAndBase(TYPE, BASE) \
template <> \
struct DDLoggedTypeTraits<TYPE> { \
using Type = TYPE; \
static constexpr const char* Name() { return #TYPE; } \
using HasBase = std::true_type; \
using BaseType = BASE; \
static constexpr const char* BaseTypeName() { \
return DDLoggedTypeTraits<BASE>::Name(); \
} \
}
#define DDLoggedTypeCustomName(TYPE, NAME) \
template <> \
struct DDLoggedTypeTraits<TYPE> { \
using Type = TYPE; \
static constexpr const char* Name() { return #NAME; } \
using HasBase = std::false_type; \
using BaseType = TYPE; \
static constexpr const char* BaseTypeName() { return ""; } \
}
#define DDLoggedTypeCustomNameAndBase(TYPE, NAME, BASE) \
template <> \
struct DDLoggedTypeTraits<TYPE> { \
using Type = TYPE; \
static constexpr const char* Name() { return #NAME; } \
using HasBase = std::true_type; \
using BaseType = BASE; \
static constexpr const char* BaseTypeName() { \
return DDLoggedTypeTraits<BASE>::Name(); \
} \
}
// Variants with built-in forward-declaration, will only work
// - in mozilla namespace,
// - with unqualified mozilla-namespace type names.
#define DDLoggedTypeDeclName(TYPE) \
class TYPE; \
DDLoggedTypeName(TYPE);
#define DDLoggedTypeDeclNameAndBase(TYPE, BASE) \
class TYPE; \
DDLoggedTypeNameAndBase(TYPE, BASE);
#define DDLoggedTypeDeclCustomName(TYPE, NAME) \
class TYPE; \
DDLoggedTypeCustomName(TYPE, NAME);
#define DDLoggedTypeDeclCustomNameAndBase(TYPE, NAME, BASE) \
class TYPE; \
DDLoggedTypeCustomNameAndBase(TYPE, NAME, BASE);
} // namespace mozilla
// Some essential types that live outside of the media stack.
class nsPIDOMWindowInner;
class nsPIDOMWindowOuter;
namespace mozilla {
namespace dom {
class Document;
class HTMLAudioElement;
class HTMLMediaElement;
class HTMLVideoElement;
} // namespace dom
DDLoggedTypeName(nsPIDOMWindowInner);
DDLoggedTypeName(nsPIDOMWindowOuter);
DDLoggedTypeName(dom::Document);
DDLoggedTypeName(dom::HTMLMediaElement);
DDLoggedTypeNameAndBase(dom::HTMLAudioElement, dom::HTMLMediaElement);
DDLoggedTypeNameAndBase(dom::HTMLVideoElement, dom::HTMLMediaElement);
} // namespace mozilla
#endif // DDLoggedTypeTraits_h_