pattern.r3.rule
*debug-rules*clj
*identity-rule-post-processor*clj
Transform the resulting value or env of a successful identity rule.
See *post-processor* for details.
The value and orig-value arguments will be identical.
Transform the resulting value or env of a successful identity rule. See [[*post-processor*]] for details. The value and orig-value arguments will be identical.
*post-processor*clj
Transform the resulting value or env of a successful rule in the context of the original value and env.
Argument and return signature:
(fn [rule value orig-value env orig-env] [value env])
Set to nil to skip post-processing.
See also *identity-rule-post-processor*, [[raw]], and others.
Transform the resulting value or env of a successful rule in the context of the original value and env. Argument and return signature: (fn [rule value orig-value env orig-env] [value env]) Set to nil to skip post-processing. See also [[*identity-rule-post-processor*]], [[raw]], and others.
dict-handlerclj
(dict-handler match-procedure)do-pattern-replaceclj
(do-pattern-replace pattern)invoke-ruleclj
(invoke-rule rule data env {:keys [on-match on-result]} succeed fail)make-ruleclj
(make-rule orig-pattern handler)(make-rule orig-pattern handler metadata)(make-rule orig-pattern handler ->get-values post-process metadata)Compiler for rules. Returns a function that when called with a datum either returns the original value or if the pattern matches and the handler returns a value, return the value returned by the handler.
Rules are meant to be combined via the combinators library.
By default, calls the handler with a simple dictionary of matches - configured
via the dict-handler arg transformer -, but a custom arg transformation can
be specified by providing ->get-values, which is called with the compiled
match-procedure at compile time, then the result of that is called with the
results dictionary and applied to the handler.
Note that the [[rule]] macro enables splicing even in simple quoted rules, but
that is only possible with a macro. To get the same behaviour with the
make-rule function directly, either use the pattern/quo macro to turn spliceable
syntax quoted lists into regular quoted lists by stripping the namespace from
all symbols, or use regular syntax-quoted lists.
Compiler for rules. Returns a function that when called with a datum either returns the original value or if the pattern matches and the handler returns a value, return the value returned by the handler. Rules are meant to be combined via the combinators library. By default, calls the handler with a simple dictionary of matches - configured via the [[dict-handler]] arg transformer -, but a custom arg transformation can be specified by providing ->get-values, which is called with the compiled match-procedure at compile time, then the result of that is called with the results dictionary and applied to the handler. Note that the [[rule]] macro enables splicing even in simple quoted rules, but that is only possible with a macro. To get the same behaviour with the make-rule function directly, either use the [[pattern/quo]] macro to turn spliceable syntax quoted lists into regular quoted lists by stripping the namespace from all symbols, or use regular syntax-quoted lists.
post-processclj
(post-process rule value orig-value env orig-env)RebuildRulecljprotocol
-rebuild-ruleclj
(-rebuild-rule rule match-procedure handler)Rebuild a rule with the same value extraction and post-processing.
Optionally specify replacement match-procedure or replacement handler.
Metadata may be updated the usual way.
Rebuild a rule with the same value extraction and post-processing. Optionally specify replacement match-procedure or replacement handler. Metadata may be updated the usual way.
rule-nameclj
(rule-name rule)Get the name or pattern to identify the rule.
Get the name or pattern to identify the rule.
run-ruleclj
(run-rule rule datum env)(run-rule rule datum events env)Runs a rule and returns either the successfully updated value or the original if the rule fails.
Runs a rule and returns either the successfully updated value or the original if the rule fails.
unwrapclj
(unwrap original x)If a value was marked as (success x), unwraps and returns x.
If a value was marked as (success x), unwraps and returns x.
unwrap-envclj
(unwrap-env env x)cljdoc is a website building & hosting documentation for Clojure/Script libraries
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