VerifyReadOnly()

VerifyReadOnly([ClassName, LineFile, LineNumber, Source])

VerifyReadOnly()

Check to see if current derived instance is readonly and throws an error if an attempt is made to change a value of a readonly instance.

Parameters

ClassName

Optional name of class calling method, Default to the calling class name

LineFile

Optional, The File that called the method. Defaults to A_LineFile

LineNumber

Optional, The Line that the error was thrown on. Defaults to A_LineNumber

Source

Optional, A Source related to the error. Defaults to A_ThisFunc
Can be any Object or var

Throws

Throw MfNotSupportedException if derived class is set to read only

Remarks

Protected method
When Applied as in the example below MfNotSupportedException will be throw if instance is Readonly.

Example

Class MfInteger extends MfPrimitive
{
   ; ... other code
   Add(value) {
       this.VerifyIsInstance(this, A_LineFile, A_LineNumber, A_ThisFunc) ; MfObject protected method
       this.VerifyReadOnly(this, A_LineFile, A_LineNumber, A_ThisFunc)   ; MfPrimitive protected method
       if (MfNull.IsNull(value)) {
           ex := new MfArgumentNullException("value")
           ex.SetProp(A_LineFile, A_LineNumber, A_ThisFunc)
           throw ex
       }
       ; ... other code
   }
}