dev - pragma for development code

A simple idea: a single pragma to switch between development and production code behaviour.

Synopsis

use dev; # turns on strict, warnings, diagnostics
use dev 'LOGLEVEL' => 1;  # turns on logging preset
use dev 'WARNFATAL' => 1; # warnings cause death
use dev 'ONFATAL' => sub { ... }; # callbacks
no dev; # for stable production code
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Rationale

Using dev would make it simpler to turn on and off things you might want in development code, but not in production code. Also, it might encourage standardization on certain logging tools and exception handling mechanisms.