9 Dispatch🔗
This module provides syntax for building a role-aware dispatch
function.
(dispatch-rules+roles dispatch-clause ... maybe-else-clause)
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| dispatch-clause | | = | | [dispatch-pattern maybe-method maybe-roles maybe-name dispatch-fun] | | | | | | | | dispatch-pattern | | = | | () | | | | | | | (string . dispatch-pattern) | | | | | | | (bidi-match-expander ... . dispatch-pattern) | | | | | | | (bidi-match-expander . dispatch-pattern) | | | | | | | | maybe-method | | = | | | | | | | | | #:method method | | | | | | | | maybe-roles | | = | | | | | | | | | #:roles (role ...) | | | | | | | | maybe-name | | = | | | | | | | | | #:name name | | | | | | | | maybe-else-clause | | = | | | | | | | | | [else else-fun] | | | | | | | | method | | = | | pat | | | | | | | | role | | = | | id | | | | | | | | name | | = | | symbol? |
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Like
dispatch-rules but each
dispatch-clause takes
an optional list of roles and an optional name.
Returns three values: the first being a dispatcher function like in
dispatch-rules, the second a function that can generate
reverse URIs and the third a function that, given a
request, can return the required set of roles for the
matching dispatch-fun.
Reverse URI generation is different from dispatch-rules in
that the first argument is a symbol representing the name of the
route rather than the specific dispatch-fun that was used.
This helps avoid deep dependency chains between routes. The name
for a route is either the value passed to maybe-name or the
name of its dispatch function.