v8  6.8.275(node10.15.3)
V8 is Google's open source JavaScript engine
PropertyCallbackInfo< T > Class Template Reference

#include <v8.h>

Public Member Functions

V8_INLINE IsolateGetIsolate () const
 
V8_INLINE Local< ValueData () const
 
V8_INLINE Local< ObjectThis () const
 
V8_INLINE Local< ObjectHolder () const
 
V8_INLINE ReturnValue< T > GetReturnValue () const
 
V8_INLINE bool ShouldThrowOnError () const
 

Static Public Attributes

static const int kArgsLength = 7
 

Protected Member Functions

V8_INLINE PropertyCallbackInfo (internal::Object **args)
 

Protected Attributes

internal::Object ** args_
 

Static Protected Attributes

static const int kShouldThrowOnErrorIndex = 0
 
static const int kHolderIndex = 1
 
static const int kIsolateIndex = 2
 
static const int kReturnValueDefaultValueIndex = 3
 
static const int kReturnValueIndex = 4
 
static const int kDataIndex = 5
 
static const int kThisIndex = 6
 

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 135 of file v8.h.

Constructor & Destructor Documentation

◆ PropertyCallbackInfo()

V8_INLINE PropertyCallbackInfo ( internal::Object **  args)
inlineprotected

Definition at line 4000 of file v8.h.

Member Function Documentation

◆ Data()

Local< Value > Data ( ) const
Returns
The data set in the configuration, i.e., in NamedPropertyHandlerConfiguration or IndexedPropertyHandlerConfiguration.

Definition at line 10350 of file v8.h.

◆ GetIsolate()

Isolate * GetIsolate ( ) const
Returns
The isolate of the property access.

Definition at line 10344 of file v8.h.

◆ GetReturnValue()

ReturnValue< T > GetReturnValue ( ) const
Returns
The return value of the callback. Can be changed by calling Set().
info.GetReturnValue().Set(...)

Definition at line 10368 of file v8.h.

◆ Holder()

Local< Object > Holder ( ) const
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 10362 of file v8.h.

◆ ShouldThrowOnError()

bool ShouldThrowOnError ( ) const
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 10373 of file v8.h.

◆ This()

Local< Object > This ( ) const
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,
auto context = info.GetIsolate()->GetCurrentContext();
info.This()
->GetRealNamedProperty(context, v8_str("a"))
.ToLocalChecked();
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);
}
templ->InstanceTemplate()->SetHandler(
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 10356 of file v8.h.

Friends And Related Function Documentation

◆ internal::CustomArguments< PropertyCallbackInfo >

Definition at line 3991 of file v8.h.

◆ internal::PropertyCallbackArguments

friend class internal::PropertyCallbackArguments
friend

Definition at line 3990 of file v8.h.

◆ MacroAssembler

friend class MacroAssembler
friend

Definition at line 3989 of file v8.h.

Field Documentation

◆ args_

internal::Object** args_
protected

Definition at line 4001 of file v8.h.

◆ kArgsLength

const int kArgsLength = 7
static

Definition at line 3986 of file v8.h.

◆ kDataIndex

const int kDataIndex = 5
staticprotected

Definition at line 3997 of file v8.h.

◆ kHolderIndex

const int kHolderIndex = 1
staticprotected

Definition at line 3993 of file v8.h.

◆ kIsolateIndex

const int kIsolateIndex = 2
staticprotected

Definition at line 3994 of file v8.h.

◆ kReturnValueDefaultValueIndex

const int kReturnValueDefaultValueIndex = 3
staticprotected

Definition at line 3995 of file v8.h.

◆ kReturnValueIndex

const int kReturnValueIndex = 4
staticprotected

Definition at line 3996 of file v8.h.

◆ kShouldThrowOnErrorIndex

const int kShouldThrowOnErrorIndex = 0
staticprotected

Definition at line 3992 of file v8.h.

◆ kThisIndex

const int kThisIndex = 6
staticprotected

Definition at line 3998 of file v8.h.


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