KJS::Value Class Reference

#include <value.h>

Inheritance diagram for KJS::Value:

Public Member Functions
	Value (ValueImp *v)
	Value (const Value &v)
Value &	operator= (const Value &v)
bool	isValid () const
bool	isNull () const
ValueImp *	imp () const
Type	type () const
bool	isA (Type t) const
Value	toPrimitive (ExecState *exec, Type preferredType=UnspecifiedType) const
bool	toBoolean (ExecState *exec) const
double	toNumber (ExecState *exec) const
int	toInteger (ExecState *exec) const
int	toInt32 (ExecState *exec) const
unsigned int	toUInt32 (ExecState *exec) const
unsigned short	toUInt16 (ExecState *exec) const
UString	toString (ExecState *exec) const
Object	toObject (ExecState *exec) const
bool	toUInt32 (unsigned &i) const

Protected Attributes
ValueImp *	rep

Detailed Description

Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents.

Instead of using ValueImps (and derivatives) during normal program execution, you should use a Value-derived class.

Value maintains a pointer to a ValueImp object and uses a reference counting scheme to ensure that the ValueImp object is not deleted or garbage collected.

Note: The conversion operations all return values of various types - if an error occurs during conversion, an error object will instead be returned (where possible), and the execution state's exception will be set appropriately.

Definition at line 167 of file value.h.

Member Function Documentation

isA()

bool KJS::Value::isA ( Type  t ) const

inline

Checks whether or not the value is of a particular tpye.

Parameters

t	The type to compare with

Returns

true if the value is of the specified type, otherwise false

Definition at line 203 of file value.h.

isNull()

bool KJS::Value::isNull ( ) const

inline

Deprecated:

Use !isValid() instead.

Definition at line 186 of file value.h.

isValid()

bool KJS::Value::isValid ( ) const

inline

Returns whether or not this is a valid value.

An invalid value has a 0 implementation pointer and should not be used for any other operation than this check. Current use: as a distinct return value signalling failing dynamicCast() calls.

Definition at line 181 of file value.h.

toBoolean()

bool KJS::Value::toBoolean ( ExecState *  exec ) const

inline

Performs the ToBoolean type conversion operation on this value (ECMA 9.2)

Definition at line 216 of file value.h.

toInt32()

int KJS::Value::toInt32 ( ExecState *  exec ) const

inline

Performs the ToInt32 type conversion operation on this value (ECMA 9.5)

Definition at line 231 of file value.h.

toInteger()

int KJS::Value::toInteger ( ExecState *  exec ) const

inline

Performs the ToInteger type conversion operation on this value (ECMA 9.4)

Definition at line 226 of file value.h.

toNumber()

double KJS::Value::toNumber ( ExecState *  exec ) const

inline

Performs the ToNumber type conversion operation on this value (ECMA 9.3)

Definition at line 221 of file value.h.

toObject()

Object KJS::Value::toObject ( ExecState *  exec ) const

inline

Performs the ToObject type conversion operation on this value (ECMA 9.9)

Definition at line 358 of file object.h.

toPrimitive()

Value KJS::Value::toPrimitive ( ExecState *  exec, Type  preferredType = UnspecifiedType  ) const

inline

Performs the ToPrimitive type conversion operation on this value (ECMA 9.1)

Definition at line 209 of file value.h.

toString()

UString KJS::Value::toString ( ExecState *  exec ) const

inline

Performs the ToString type conversion operation on this value (ECMA 9.8)

Definition at line 246 of file value.h.

toUInt16()

unsigned short KJS::Value::toUInt16 ( ExecState *  exec ) const

inline

Performs the ToUInt16 type conversion operation on this value (ECMA 9.7)

Definition at line 241 of file value.h.

toUInt32() [1/2]

unsigned int KJS::Value::toUInt32 ( ExecState *  exec ) const

inline

Performs the ToUInt32 type conversion operation on this value (ECMA 9.6)

Definition at line 236 of file value.h.

toUInt32() [2/2]

bool KJS::Value::toUInt32 ( unsigned &  i ) const

inline

Checks if we can do a lossless conversion to UInt32.

Definition at line 256 of file value.h.

type()

Type KJS::Value::type ( ) const

inline

Returns the type of value.

This is one of UndefinedType, NullType, BooleanType, StringType, NumberType, or ObjectType.

Returns

The type of value

Definition at line 195 of file value.h.

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

• value.h
• object.h
• value.cpp