PropertyCallbackInfo< T > Class Template Reference

#include <v8-function-callback.h>

Public Member Functions
V8_INLINE Isolate *	GetIsolate () const
V8_INLINE Local< Value >	Data () const
V8_INLINE Local< Object >	This () const
V8_INLINE Local< Object >	Holder () const
V8_INLINE ReturnValue< T >	GetReturnValue () const
V8_INLINE bool	ShouldThrowOnError () const

Friends
class	MacroAssembler
class	internal::PropertyCallbackArguments
class	internal::CustomArguments< PropertyCallbackInfo >

Detailed Description

template<typename T>
class v8::PropertyCallbackInfo< T >

The information passed to a property callback about the context of the property access.

Definition at line 167 of file v8-function-callback.h.

Member Function Documentation

Data()

template<typename T >

Local< Value > Data

Returns

The data set in the configuration, i.e., in NamedPropertyHandlerConfiguration or IndexedPropertyHandlerConfiguration.

Definition at line 470 of file v8-function-callback.h.

GetIsolate()

template<typename T >

Isolate * GetIsolate

Returns

The isolate of the property access.

Definition at line 465 of file v8-function-callback.h.

GetReturnValue()

template<typename T >

ReturnValue< T > GetReturnValue

Returns

The return value of the callback. Can be changed by calling Set().

info.GetReturnValue().Set(...)

Definition at line 485 of file v8-function-callback.h.

Holder()

template<typename T >

Local< Object > Holder

Returns

The object in the prototype chain of the receiver that has the interceptor. Suppose you have x and its prototype is y, and y has an interceptor. Then info.This() is x and info.Holder() is y. The Holder() could be a hidden object (the global object, rather than the global proxy).

Note

For security reasons, do not pass the object back into the runtime.

Definition at line 480 of file v8-function-callback.h.

ShouldThrowOnError()

template<typename T >

bool ShouldThrowOnError

Returns

True if the intercepted function should throw if an error occurs. Usually, true corresponds to ‘'use strict’`.

Note

Always false when intercepting Reflect.set() independent of the language mode.

Definition at line 490 of file v8-function-callback.h.

References v8::internal::ShouldThrowOnError().

This()

template<typename T >

Local< Object > This

Returns

The receiver. In many cases, this is the object on which the property access was intercepted. When using Reflect.get, Function.prototype.call, or similar functions, it is the object passed in as receiver or thisArg.

void GetterCallback(Local<Name> name,
                    const v8::PropertyCallbackInfo<v8::Value>& info) {
   auto context = info.GetIsolate()->GetCurrentContext();
 
   v8::Local<v8::Value> a_this =
       info.This()
           ->GetRealNamedProperty(context, v8_str("a"))
           .ToLocalChecked();
   v8::Local<v8::Value> a_holder =
       info.Holder()
           ->GetRealNamedProperty(context, v8_str("a"))
           .ToLocalChecked();
 
  CHECK(v8_str("r")->Equals(context, a_this).FromJust());
  CHECK(v8_str("obj")->Equals(context, a_holder).FromJust());
 
  info.GetReturnValue().Set(name);
}
 
v8::Local<v8::FunctionTemplate> templ =
v8::FunctionTemplate::New(isolate);
templ->InstanceTemplate()->SetHandler(
    v8::NamedPropertyHandlerConfiguration(GetterCallback));
LocalContext env;
env->Global()
    ->Set(env.local(), v8_str("obj"), templ->GetFunction(env.local())
                                         .ToLocalChecked()
                                         ->NewInstance(env.local())
                                         .ToLocalChecked())
    .FromJust();
 
CompileRun("obj.a = 'obj'; var r = {a: 'r'}; Reflect.get(obj, 'x', r)");

Definition at line 475 of file v8-function-callback.h.

Friends And Related Symbol Documentation

internal::CustomArguments< PropertyCallbackInfo >

template<typename T >

friend class internal::CustomArguments< PropertyCallbackInfo >

friend

Definition at line 256 of file v8-function-callback.h.

internal::PropertyCallbackArguments

template<typename T >

friend class internal::PropertyCallbackArguments

friend

Definition at line 256 of file v8-function-callback.h.

MacroAssembler

template<typename T >

friend class MacroAssembler

friend

Definition at line 255 of file v8-function-callback.h.

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The documentation for this class was generated from the following file:

• include/v8-function-callback.h