Type Alias JssmHookDeclaration

A parsed FSL boundary-hook declaration — the on <enter|exit> <subject> do '<action>'; form. event is the boundary crossing the hook listens for, subject is either a JssmGroupRef (a &Group) or a plain state label string, and action is the (unquoted) action name to run. The compiler routes a group subject into group_hooks and a state subject into state_hooks on JssmGenericConfig; runtime firing is a later task.

import { parse } from 'jssm';
parse("on enter &busy do 'log';")[0];
// { key:'hook_decl', event:'enter',
//   subject:{ key:'group_ref', name:'busy' }, action:'log' }
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