4 Program Control

Non-Local Exits and Cleanup Clauses

Non-local exits allow the direct transfer of control to a previous point in program execution. The normal chain of function returns is aborted.

Cleanup clauses are bodies which are guaranteed to execute, even if the program segment of which they are a part is aborted by a non-local exit.

Non-local exits and cleanup clauses are implemented by the block statement. A complete description of the block statement is given on page 390.

Dylan Reference Manual - 17 OCT 1995