revert as workaround for compiler error with old clang < 17
commit 940af9f2c87b436559b97c53763aa9eaaf1254eb
Author: Jeremy Roman <[email protected]>
Date: Wed Nov 15 16:24:54 2023 +0000
Use C++20 features to simplify blink::NativeValueTraitsBase.
These allow some of the metaprogramming bits to be simplified a little.
Change-Id: I052b4397586d21348401616e1792afdb9662f975
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5030335
Reviewed-by: Yuki Shiino <[email protected]>
Commit-Queue: Jeremy Roman <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1224978}
--- a/third_party/blink/renderer/bindings/core/v8/native_value_traits.h
+++ b/third_party/blink/renderer/bindings/core/v8/native_value_traits.h
@@ -5,7 +5,6 @@
#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_NATIVE_VALUE_TRAITS_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_NATIVE_VALUE_TRAITS_H_
-#include <concepts>
#include <type_traits>
#include "third_party/blink/renderer/bindings/core/v8/idl_types_base.h"
@@ -31,7 +30,7 @@ class ExceptionState;
// return toInt32(isolate, value, exceptionState, NormalConversion);
// }
// }
-template <typename T>
+template <typename T, typename SFINAEHelper = void>
struct NativeValueTraits;
// This declaration serves only as a blueprint for specializations: the
@@ -46,15 +45,22 @@ struct NativeValueTraits;
namespace bindings {
+template <typename T, typename = void>
+struct NativeValueTraitsHasIsNull : std::false_type {};
+
template <typename T>
-struct ImplTypeFor {
- using type = T;
-};
+struct NativeValueTraitsHasIsNull<
+ T,
+ std::void_t<decltype(std::declval<T>().IsNull())>> : std::true_type {};
template <typename T>
- requires std::derived_from<T, IDLBase>
-struct ImplTypeFor<T> {
- using type = typename T::ImplType;
+struct NativeValueTraitsHasNullValue {
+ // true if |T| supports IDL null value.
+ static constexpr bool value =
+ // ScriptValue, String, and union types have IsNull member function.
+ bindings::NativeValueTraitsHasIsNull<T>::value ||
+ // Pointer types have nullptr as IDL null value.
+ std::is_pointer<T>::value;
};
} // namespace bindings
@@ -72,17 +78,37 @@ struct ImplTypeFor<T> {
// If present, |NullValue()| will be used when converting from the nullable type
// T?, and should be used if the impl type has an existing "null" state. If not
// present, WTF::Optional will be used to wrap the type.
-template <typename T>
+template <typename T, typename SFINAEHelper = void>
struct NativeValueTraitsBase {
STATIC_ONLY(NativeValueTraitsBase);
- using ImplType = bindings::ImplTypeFor<T>::type;
+ using ImplType = T;
+
+ static constexpr bool has_null_value =
+ bindings::NativeValueTraitsHasNullValue<ImplType>::value;
+
+ template <typename... ExtraArgs>
+ static decltype(auto) ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state,
+ ExtraArgs... extra_args) {
+ return NativeValueTraits<std::remove_pointer_t<T>>::NativeValue(
+ isolate, value, exception_state,
+ std::forward<ExtraArgs>(extra_args)...);
+ }
+};
+
+template <typename T>
+struct NativeValueTraitsBase<
+ T,
+ std::enable_if_t<std::is_base_of<IDLBase, T>::value>> {
+ STATIC_ONLY(NativeValueTraitsBase);
+
+ using ImplType = typename T::ImplType;
- // Pointer types have nullptr as IDL null value.
- // ScriptValue, String, and union types have IsNull member function.
static constexpr bool has_null_value =
- std::is_pointer_v<ImplType> ||
- requires(ImplType value) { value.IsNull(); };
+ bindings::NativeValueTraitsHasNullValue<ImplType>::value;
// This should only be true for certain subclasses of ScriptWrappable
// that satisfy the assumptions of CreateIDLSequenceFromV8ArraySlow() with
--- a/third_party/blink/renderer/bindings/core/v8/native_value_traits_buffer_sources.cc
+++ b/third_party/blink/renderer/bindings/core/v8/native_value_traits_buffer_sources.cc
@@ -7,7 +7,6 @@
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/web_feature.h"
-#include "third_party/blink/renderer/core/typed_arrays/flexible_array_buffer_view.h"
#include "third_party/blink/renderer/core/typed_arrays/typed_flexible_array_buffer_view.h"
namespace blink {
@@ -698,11 +697,12 @@ DOMArrayBufferBase* NativeValueTraits<
// ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-NotShared<T> NativeValueTraits<NotShared<T>>::NativeValue(
- v8::Isolate* isolate,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+NotShared<T> NativeValueTraits<
+ NotShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ NativeValue(v8::Isolate* isolate,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return NativeValueImpl<
RecipeTrait<NotShared<T>>, ToDOMViewType<T, kNotShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kCheck,
@@ -711,12 +711,13 @@ NotShared<T> NativeValueTraits<NotShared
}
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-NotShared<T> NativeValueTraits<NotShared<T>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+NotShared<T> NativeValueTraits<
+ NotShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<
RecipeTrait<NotShared<T>>, ToDOMViewType<T, kNotShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kCheck,
@@ -727,11 +728,12 @@ NotShared<T> NativeValueTraits<NotShared
// [AllowShared] ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T> NativeValueTraits<MaybeShared<T>>::NativeValue(
- v8::Isolate* isolate,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ MaybeShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ NativeValue(v8::Isolate* isolate,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return NativeValueImpl<RecipeTrait<MaybeShared<T>>,
ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kCheck,
@@ -740,12 +742,13 @@ MaybeShared<T> NativeValueTraits<MaybeSh
}
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T> NativeValueTraits<MaybeShared<T>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ MaybeShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<RecipeTrait<MaybeShared<T>>,
ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kCheck,
@@ -756,12 +759,12 @@ MaybeShared<T> NativeValueTraits<MaybeSh
// [AllowShared, BufferSourceTypeNoSizeLimit] ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T>
-NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>::NativeValue(
- v8::Isolate* isolate,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ NativeValue(v8::Isolate* isolate,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return NativeValueImpl<
RecipeTrait<MaybeShared<T>>, ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kDoNotCheck,
@@ -770,12 +773,13 @@ NativeValueTraits<IDLBufferSourceTypeNoS
}
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T> NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<
- MaybeShared<T>>>::ArgumentValue(v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<
RecipeTrait<MaybeShared<T>>, ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNotNullable, BufferSizeCheck::kDoNotCheck,
@@ -786,11 +790,12 @@ MaybeShared<T> NativeValueTraits<IDLBuff
// Nullable ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-NotShared<T> NativeValueTraits<IDLNullable<NotShared<T>>>::NativeValue(
- v8::Isolate* isolate,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+NotShared<T> NativeValueTraits<
+ IDLNullable<NotShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ NativeValue(v8::Isolate* isolate,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return NativeValueImpl<
RecipeTrait<NotShared<T>>, ToDOMViewType<T, kNotShared>,
Nullablity::kIsNullable, BufferSizeCheck::kCheck,
@@ -799,12 +804,13 @@ NotShared<T> NativeValueTraits<IDLNullab
}
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-NotShared<T> NativeValueTraits<IDLNullable<NotShared<T>>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+NotShared<T> NativeValueTraits<
+ IDLNullable<NotShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<
RecipeTrait<NotShared<T>>, ToDOMViewType<T, kNotShared>,
Nullablity::kIsNullable, BufferSizeCheck::kCheck,
@@ -815,11 +821,12 @@ NotShared<T> NativeValueTraits<IDLNullab
// Nullable [AllowShared] ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T> NativeValueTraits<IDLNullable<MaybeShared<T>>>::NativeValue(
- v8::Isolate* isolate,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ IDLNullable<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ NativeValue(v8::Isolate* isolate,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return NativeValueImpl<RecipeTrait<MaybeShared<T>>,
ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNullable, BufferSizeCheck::kCheck,
@@ -828,12 +835,13 @@ MaybeShared<T> NativeValueTraits<IDLNull
}
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T> NativeValueTraits<IDLNullable<MaybeShared<T>>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+MaybeShared<T> NativeValueTraits<
+ IDLNullable<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<RecipeTrait<MaybeShared<T>>,
ToDOMViewType<T, kMaybeShared>,
Nullablity::kIsNullable, BufferSizeCheck::kCheck,
@@ -844,9 +852,9 @@ MaybeShared<T> NativeValueTraits<IDLNull
// Nullable [AllowShared, BufferSourceTypeNoSizeLimit] ArrayBufferView
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-MaybeShared<T>
-NativeValueTraits<IDLNullable<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>>::
+MaybeShared<T> NativeValueTraits<
+ IDLNullable<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>::
ArgumentValue(v8::Isolate* isolate,
int argument_index,
v8::Local<v8::Value> value,
@@ -861,11 +869,13 @@ NativeValueTraits<IDLNullable<IDLBufferS
// [AllowShared, FlexibleArrayBufferView] ArrayBufferView
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-T NativeValueTraits<T>::ArgumentValue(v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+T NativeValueTraits<T,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<RecipeTrait<T>, ToFlexibleArrayBufferView,
Nullablity::kIsNotNullable, BufferSizeCheck::kCheck,
ResizableAllowance::kDisallowResizable,
@@ -877,12 +887,13 @@ T NativeValueTraits<T>::ArgumentValue(v8
// ArrayBufferView
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-T NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<T>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+T NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<T>,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<
RecipeTrait<T>, ToFlexibleArrayBufferView, Nullablity::kIsNotNullable,
BufferSizeCheck::kDoNotCheck, ResizableAllowance::kDisallowResizable,
@@ -893,12 +904,13 @@ T NativeValueTraits<IDLBufferSourceTypeN
// Nullable [AllowShared, FlexibleArrayBufferView] ArrayBufferView
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-T NativeValueTraits<IDLNullable<T>>::ArgumentValue(
- v8::Isolate* isolate,
- int argument_index,
- v8::Local<v8::Value> value,
- ExceptionState& exception_state) {
+T NativeValueTraits<IDLNullable<T>,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>::
+ ArgumentValue(v8::Isolate* isolate,
+ int argument_index,
+ v8::Local<v8::Value> value,
+ ExceptionState& exception_state) {
return ArgumentValueImpl<RecipeTrait<T>, ToFlexibleArrayBufferView,
Nullablity::kIsNullable, BufferSizeCheck::kCheck,
ResizableAllowance::kDisallowResizable,
--- a/third_party/blink/renderer/bindings/core/v8/native_value_traits_impl.h
+++ b/third_party/blink/renderer/bindings/core/v8/native_value_traits_impl.h
@@ -5,9 +5,7 @@
#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_NATIVE_VALUE_TRAITS_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_NATIVE_VALUE_TRAITS_IMPL_H_
-#include <concepts>
#include <optional>
-#include <type_traits>
#include "third_party/blink/renderer/bindings/core/v8/idl_types.h"
#include "third_party/blink/renderer/bindings/core/v8/native_value_traits.h"
@@ -718,8 +716,9 @@ struct CORE_EXPORT NativeValueTraits<
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<T> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>> {
// NotShared<T> or MaybeShared<T> should be used instead.
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -731,8 +730,9 @@ struct NativeValueTraits<T> {
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<IDLNullable<T>> {
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>> {
// NotShared<T> or MaybeShared<T> should be used instead.
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -744,8 +744,9 @@ struct NativeValueTraits<IDLNullable<T>>
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<NotShared<T>>
+struct NativeValueTraits<
+ NotShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<NotShared<T>> {
static NotShared<T> NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -758,8 +759,9 @@ struct NativeValueTraits<NotShared<T>>
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<IDLNullable<NotShared<T>>>
+struct NativeValueTraits<
+ IDLNullable<NotShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<NotShared<T>> {
static NotShared<T> NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -772,8 +774,9 @@ struct NativeValueTraits<IDLNullable<Not
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<MaybeShared<T>>
+struct NativeValueTraits<
+ MaybeShared<T>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<MaybeShared<T>> {
static MaybeShared<T> NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -786,8 +789,9 @@ struct NativeValueTraits<MaybeShared<T>>
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>
+struct NativeValueTraits<
+ IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<MaybeShared<T>> {
// FlexibleArrayBufferView uses this in its implementation, so we cannot
// delete it.
@@ -802,8 +806,9 @@ struct NativeValueTraits<IDLBufferSource
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
-struct NativeValueTraits<IDLNullable<MaybeShared<T>>>
+struct NativeValueTraits<
+ IDLNullable<MaybeShared<T>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<MaybeShared<T>> {
static MaybeShared<T> NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -816,9 +821,9 @@ struct NativeValueTraits<IDLNullable<May
};
template <typename T>
- requires std::derived_from<T, DOMArrayBufferView>
struct NativeValueTraits<
- IDLNullable<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>>
+ IDLNullable<IDLBufferSourceTypeNoSizeLimit<MaybeShared<T>>>,
+ typename std::enable_if_t<std::is_base_of<DOMArrayBufferView, T>::value>>
: public NativeValueTraitsBase<MaybeShared<T>> {
// BufferSourceTypeNoSizeLimit must be used only as arguments.
static MaybeShared<T> NativeValue(v8::Isolate* isolate,
@@ -832,8 +837,11 @@ struct NativeValueTraits<
};
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>
+ : public NativeValueTraitsBase<T> {
// FlexibleArrayBufferView must be used only as arguments.
static T NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -846,8 +854,10 @@ struct NativeValueTraits<T> : public Nat
};
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-struct NativeValueTraits<IDLBufferSourceTypeNoSizeLimit<T>>
+struct NativeValueTraits<
+ IDLBufferSourceTypeNoSizeLimit<T>,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>
: public NativeValueTraitsBase<T> {
// BufferSourceTypeNoSizeLimit and FlexibleArrayBufferView must be used only
// as arguments.
@@ -862,8 +872,11 @@ struct NativeValueTraits<IDLBufferSource
};
template <typename T>
- requires std::derived_from<T, FlexibleArrayBufferView>
-struct NativeValueTraits<IDLNullable<T>> : public NativeValueTraitsBase<T> {
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<
+ std::is_base_of<FlexibleArrayBufferView, T>::value>>
+ : public NativeValueTraitsBase<T> {
// FlexibleArrayBufferView must be used only as arguments.
static T NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -1199,8 +1212,9 @@ NativeValueTraits<IDLSequence<T>>::Nativ
}
template <typename T>
- requires NativeValueTraits<IDLSequence<T>>::has_null_value
-struct NativeValueTraits<IDLNullable<IDLSequence<T>>>
+struct NativeValueTraits<IDLNullable<IDLSequence<T>>,
+ typename std::enable_if_t<
+ NativeValueTraits<IDLSequence<T>>::has_null_value>>
: public NativeValueTraitsBase<HeapVector<AddMemberIfNeeded<T>>*> {
using ImplType = typename NativeValueTraits<IDLSequence<T>>::ImplType*;
@@ -1276,8 +1290,9 @@ struct NativeValueTraits<IDLArray<T>>
: public NativeValueTraits<IDLSequence<T>> {};
template <typename T>
- requires NativeValueTraits<IDLSequence<T>>::has_null_value
-struct NativeValueTraits<IDLNullable<IDLArray<T>>>
+struct NativeValueTraits<IDLNullable<IDLArray<T>>,
+ typename std::enable_if_t<
+ NativeValueTraits<IDLSequence<T>>::has_null_value>>
: public NativeValueTraits<IDLNullable<IDLSequence<T>>> {};
// Record types
@@ -1407,8 +1422,10 @@ struct NativeValueTraits<IDLRecord<K, V>
// Callback function types
template <typename T>
- requires std::derived_from<T, CallbackFunctionBase>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<std::is_base_of<CallbackFunctionBase, T>::value>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1431,8 +1448,9 @@ struct NativeValueTraits<T> : public Nat
};
template <typename T>
- requires std::derived_from<T, CallbackFunctionBase>
-struct NativeValueTraits<IDLNullable<T>>
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<std::is_base_of<CallbackFunctionBase, T>::value>>
: public NativeValueTraitsBase<IDLNullable<T>> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -1461,8 +1479,10 @@ struct NativeValueTraits<IDLNullable<T>>
// Callback interface types
template <typename T>
- requires std::derived_from<T, CallbackInterfaceBase>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<std::is_base_of<CallbackInterfaceBase, T>::value>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1486,8 +1506,9 @@ struct NativeValueTraits<T> : public Nat
// Interface types
template <typename T>
- requires std::derived_from<T, CallbackInterfaceBase>
-struct NativeValueTraits<IDLNullable<T>>
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<std::is_base_of<CallbackInterfaceBase, T>::value>>
: public NativeValueTraitsBase<IDLNullable<T>> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -1516,8 +1537,11 @@ struct NativeValueTraits<IDLNullable<T>>
// Dictionary types
template <typename T>
- requires std::derived_from<T, bindings::DictionaryBase>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<
+ std::is_base_of<bindings::DictionaryBase, T>::value>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1528,11 +1552,14 @@ struct NativeValueTraits<T> : public Nat
// We don't support nullable dictionary types in general since it's quite
// confusing and often misused.
template <typename T>
- requires std::derived_from<T, bindings::DictionaryBase> &&
- (std::same_as<T, GPUColorTargetState> ||
- std::same_as<T, GPURenderPassColorAttachment> ||
- std::same_as<T, GPUVertexBufferLayout>)
-struct NativeValueTraits<IDLNullable<T>> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<
+ std::is_base_of<bindings::DictionaryBase, T>::value &&
+ (std::is_same<T, GPUColorTargetState>::value ||
+ std::is_same<T, GPURenderPassColorAttachment>::value ||
+ std::is_same<T, GPUVertexBufferLayout>::value)>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1544,8 +1571,11 @@ struct NativeValueTraits<IDLNullable<T>>
// Enumeration types
template <typename T>
- requires std::derived_from<T, bindings::EnumerationBase>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<
+ std::is_base_of<bindings::EnumerationBase, T>::value>>
+ : public NativeValueTraitsBase<T> {
static T NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1555,8 +1585,10 @@ struct NativeValueTraits<T> : public Nat
// Interface types
template <typename T>
- requires std::derived_from<T, ScriptWrappable>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<std::is_base_of<ScriptWrappable, T>::value>>
+ : public NativeValueTraitsBase<T*> {
// This signifies that CreateIDLSequenceFromV8ArraySlow() may apply
// certain optimization based on assumptions about `NativeValue()`
// implementation below. For subclasses of ScriptWrappable that have
@@ -1593,8 +1625,9 @@ struct NativeValueTraits<T> : public Nat
};
template <typename T>
- requires std::derived_from<T, ScriptWrappable>
-struct NativeValueTraits<IDLNullable<T>>
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<std::is_base_of<ScriptWrappable, T>::value>>
: public NativeValueTraitsBase<IDLNullable<T>> {
static inline T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
@@ -1629,8 +1662,10 @@ struct NativeValueTraits<IDLNullable<T>>
};
template <typename T>
- requires std::derived_from<T, bindings::UnionBase>
-struct NativeValueTraits<T> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ T,
+ typename std::enable_if_t<std::is_base_of<bindings::UnionBase, T>::value>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1646,8 +1681,10 @@ struct NativeValueTraits<T> : public Nat
};
template <typename T>
- requires std::derived_from<T, bindings::UnionBase>
-struct NativeValueTraits<IDLNullable<T>> : public NativeValueTraitsBase<T*> {
+struct NativeValueTraits<
+ IDLNullable<T>,
+ typename std::enable_if_t<std::is_base_of<bindings::UnionBase, T>::value>>
+ : public NativeValueTraitsBase<T*> {
static T* NativeValue(v8::Isolate* isolate,
v8::Local<v8::Value> value,
ExceptionState& exception_state) {
@@ -1668,8 +1705,9 @@ struct NativeValueTraits<IDLNullable<T>>
// Nullable types
template <typename InnerType>
- requires(!NativeValueTraits<InnerType>::has_null_value)
-struct NativeValueTraits<IDLNullable<InnerType>>
+struct NativeValueTraits<
+ IDLNullable<InnerType>,
+ typename std::enable_if_t<!NativeValueTraits<InnerType>::has_null_value>>
: public NativeValueTraitsBase<IDLNullable<InnerType>> {
// https://webidl.spec.whatwg.org/#es-nullable-type
using ImplType =
@@ -1701,8 +1739,9 @@ struct NativeValueTraits<IDLNullable<IDL
// Optional types
template <typename T>
- requires std::is_arithmetic_v<typename NativeValueTraits<T>::ImplType>
-struct NativeValueTraits<IDLOptional<T>>
+struct NativeValueTraits<IDLOptional<T>,
+ typename std::enable_if_t<std::is_arithmetic<
+ typename NativeValueTraits<T>::ImplType>::value>>
: public NativeValueTraitsBase<typename NativeValueTraits<T>::ImplType> {
using ImplType = typename NativeValueTraits<T>::ImplType;
@@ -1724,8 +1763,9 @@ struct NativeValueTraits<IDLOptional<T>>
};
template <typename T>
- requires std::is_pointer_v<typename NativeValueTraits<T>::ImplType>
-struct NativeValueTraits<IDLOptional<T>>
+struct NativeValueTraits<IDLOptional<T>,
+ typename std::enable_if_t<std::is_pointer<
+ typename NativeValueTraits<T>::ImplType>::value>>
: public NativeValueTraitsBase<typename NativeValueTraits<T>::ImplType> {
using ImplType = typename NativeValueTraits<T>::ImplType;
