__OBJMODMETHOD()

Modify (replace) a METHOD in an already existing class

Syntax

__objModMethod( <oObject>, <cMethodName>, <nFuncPtr> ) --> oObject

Arguments

<oObject> is the object to work on.

<cMethodName> is the symbol name of the METHOD to modify.

<nFuncPtr> is a pointer to a new function to associate with the method.

Returns

__objModMethod() return a reference to <oObject>.

Description

__objModMethod() is a low level class support function that modify a METHOD in an object and replace it with a new function. is unchanged if a symbol with the name does not exist in . __objModMethod() is used in inheritance mechanism.

Note that is a special pointer to a function that was created using the @ operator, see example below.

Examples

// create a new THappy class and add a Smile method
oHappy := TClass():New( "THappy" )
__objAddMethod( oHappy, "Smile", @MySmile() )
? oHappy:Smile( 1 ) // :)
? oHappy:Smile( 2 ) // ;)
// replace Smile method with a new function
__objAddMethod( oHappy, "Smile", @YourSmile() )
? oHappy:Smile( 1 ) // *SMILE*
? oHappy:Smile( 2 ) // *WINK*
STATIC FUNCTION MySmile( nType )
LOCAL cSmile
DO CASE
CASE nType == 1
cSmile := ":)"
CASE nType == 2
cSmile := ";)"
ENDCASE
RETURN cSmile
STATIC FUNCTION YourSmile( nType )
LOCAL cSmile
DO CASE
CASE nType == 1
cSmile := "*SMILE*"
CASE nType == 2
cSmile := "*WINK*"
ENDCASE
RETURN cSmile

Status

Ready

Compliance

__objModMethod() is a Harbour extension.

Files

Library is rtl

See Also