v8::MaybeLocal< T > Class Template Reference

#include <v8.h>

Public Member Functions
	MaybeLocal ()
template<class S >
	MaybeLocal (Local< S > that)
bool	IsEmpty () const
template<class S >
bool	ToLocal (Local< S > *out) const
Local< T >	ToLocalChecked ()
template<class S >
Local< S >	FromMaybe (Local< S > default_value) const

Detailed Description

template<class T>
class v8::MaybeLocal< T >

A MaybeLocal<> is a wrapper around Local<> that enforces a check whether the Local<> is empty before it can be used.

If an API method returns a MaybeLocal<>, the API method can potentially fail either because an exception is thrown, or because an exception is pending, e.g. because a previous API call threw an exception that hasn't been caught yet, or because a TerminateExecution exception was thrown. In that case, an empty MaybeLocal is returned.

Examples

process.cc, and shell.cc.

Constructor & Destructor Documentation

MaybeLocal() [1/2]

template<class T >

v8::MaybeLocal< T >::MaybeLocal ( )

inline

MaybeLocal() [2/2]

template<class T >

template<class S >

v8::MaybeLocal< T >::MaybeLocal ( Local< S >  that )

inline

Member Function Documentation

FromMaybe()

template<class T >

template<class S >

Local< S > v8::MaybeLocal< T >::FromMaybe ( Local< S >  default_value ) const

inline

Converts this MaybeLocal<> to a Local<>, using a default value if this MaybeLocal<> is empty.

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IsEmpty()

template<class T >

bool v8::MaybeLocal< T >::IsEmpty ( ) const

inline

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ToLocal()

template<class T >

template<class S >

bool v8::MaybeLocal< T >::ToLocal ( Local< S > *  out ) const

inline

Converts this MaybeLocal<> to a Local<>. If this MaybeLocal<> is empty, |false| is returned and |out| is left untouched.

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ToLocalChecked()

template<class T >

Local< T > v8::MaybeLocal< T >::ToLocalChecked

inline

Converts this MaybeLocal<> to a Local<>. If this MaybeLocal<> is empty, V8 will crash the process.

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

• include/v8.h