Exceptions: Difference between revisions

The Perl 6Raku equivalent to Perl 5's eval {...} is try {...}. A try block by default has a CATCH block that handles all fatal exceptions by ignoring them. If you define a CATCH block within the try, it replaces the default CATCH. It also makes the try keyword redundant, because any block can function as a try block if you put a CATCH block within it. The inside of a CATCH functions as a switch statement on the current exception.

Perl 6Rake comes with [http://design.perl6raku.org/S04.html#Phasers phasers], that are called when certain conditions in the life of a program, routine or block are met. <tt>CATCH</tt> is one of them and works nicely together with <tt>LEAVE</tt> that is called even if an exception would force the current block to be left immediately. It's a nice place to put your cleanup code.