From: Martin DeMello <martindemello@...>
Date: 2008-02-23T05:42:28+09:00
Subject: nice pattern for running a series of error checks

came up with this while refactoring some code:

case
when test_1; report_error test_1
when test_2; report_error test_2
when test_3; report_error test_3
else; do_success

the nice thing is that it automatically exits the structure at the
first failing test.

martin