defntly.core
defn-update-bodyclj/s
(defn-update-body f args)Return a defn form where the body is updated by f.
f receives name and body and returns an updated body.
It supports all the defn arguments (doctrings, metadata, multi-artities etc..)
It is meant to by used to create defn like macros.
Based on https://blog.klipse.tech/clojure/2019/03/08/spec-custom-defn.html
Example:
We create a defn-try macro that automatically wraps the function body in a try/catch form.
(defn wrap-try [name body] `((try ~@body (catch :default ~'e (throw (str "Exception caught in function " ~name ": " ~'e))))))
(defmacro defn-try [& args] (defn-update-body wrap-try args))
We use defn-try exactly like defn:
(defn-try foo [a b] (+ a b))
is macroexpanded into:
(defn foo [a b] (try (+ a b) (catch java.lang.Throwable e (throw (str "Exception caught in function " "foo" ": " e)))))
Return a `defn` form where the body is updated by `f`.
`f` receives `name` and `body` and returns an updated body.
It supports all the `defn` arguments (doctrings, metadata, multi-artities etc..)
It is meant to by used to create `defn` like macros.
Based on https://blog.klipse.tech/clojure/2019/03/08/spec-custom-defn.html
Example:
We create a `defn-try` macro that automatically wraps the function body in a `try/catch` form.
(defn wrap-try [name body]
`((try ~@body
(catch :default ~'e
(throw (str "Exception caught in function " ~name ": " ~'e))))))
(defmacro defn-try [& args]
(defn-update-body wrap-try args))
We use `defn-try` exactly like `defn`:
(defn-try foo [a b]
(+ a b))
is macroexpanded into:
(defn foo [a b]
(try
(+ a b)
(catch
java.lang.Throwable
e
(throw (str "Exception caught in function " "foo" ": " e)))))cljdoc is a website building & hosting documentation for Clojure/Script libraries
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