class="keyword">of</span> int</span></code></div><div class="spec-doc"><p>This can be used to avoid scattering exit invocations all over the codebase</p></div></div><div class="odoc-spec"><div class="spec type" id="type-error" class="anchored"><a href="#type-error" class="anchor"></a><code><span><span class="keyword">type</span> error</span><span> = </span></code><table><tr id="type-error.ExternalError" class="anchored"><td class="def variant constructor"><a href="#type-error.ExternalError" class="anchor"><