home *** CD-ROM | disk | FTP | other *** search
- unknown cmdName ?arg arg ...?
- This command doesn't actually exist as part of Tcl, but
- Tcl will invoke it if it does exist. If the Tcl
- interpreter encounters a command name for which there
- is not a defined command, then Tcl checks for the
- existence of a command named unknown. If there is no
- such command, then the interpeter returns an error. If
- the unknown command exists, then it is invoked with
- arguments consisting of the fully-substituted name and
- arguments for the original non-existent command. The
- unknown command typically does things like searching
- through library directories for a command procedure
- with the name cmdName, or expanding abbreviated command
- names to full-length, or automatically executing
- unknown commands as UNIX sub-processes. In some cases
- (such as expanding abbreviations) unknown will change
- the original command slightly and then (re-)execute it.
- The result of the unknown command is used as the result
- for the original non-existent command.
-