Function: proc_set

Syntax

proc_set (<ident>)

Type

numeric

Returns

Whether or not a procedure or function has been set, i.e. whether executing it will have any effect. If it has, the value returned by this function is one, otherwise zero is returned. This function applies only to procedures and functions. For other types of identifier a zero value is returned.

Some system procedures, e.g. some graphic window menubar callbacks, invoke a default action if not set. Calling this function on such procedures will yield zero if they have not been overridden by an assignment.

Parameters

• <ident>
  A function or procedure name.

Examples

window w=wgraphic
tell proc_set(w.delete) ;# Yields 0
w.delete = {
    args w= window
    !Deleting window
    wdelete w
}
tell proc_set(w.delete) ;# Yields 1.

See Also