Add a variable to a class instance at runtime: Difference between revisions

ELENA does not support adding a variablefield at run-time but it can be simulated with the help of a group object

<lang elena>#subjectdefine foosystem.

#class FieldContainerExtender

#field theValuetheObject.

#methodconstructor foo'setnew : anObject

theValuetheObject := anObject.

#method foo'get = theValuetheField.

#symbol Programprogram =

anObject := Extender new:anObject &= FieldContainer.

anObject foo'set &foo:"bar".

'program'Outputconsole << anObject << ".foo=" << anObject foo.

'program'inputconsole getreadChar.