Info Catalog elisp: Generators elisp: Control Structures

elisp: Nonlocal Exits

 
 10.6 Nonlocal Exits
 ===================
 
 A “nonlocal exit” is a transfer of control from one point in a program
 to another remote point.  Nonlocal exits can occur in Emacs Lisp as a
 result of errors; you can also use them under explicit control.
 Nonlocal exits unbind all variable bindings made by the constructs being
 exited.
 

Menu

 
· Catch and Throw     Nonlocal exits for the program’s own purposes.
· Examples of Catch   Showing how such nonlocal exits can be written.
· Errors              How errors are signaled and handled.
· Cleanups            Arranging to run a cleanup form if an error happens.
 

Info Catalog elisp: Generators elisp: Control Structures