~@ unquote splicing

syntaxsince v0.0-1853 in clojureEdit

Like ~ unquote, except the result is spliced (i.e. [a b] => a b)

  • `(foo ~@x) => (cljs.user/foo a b) (if x is [a b])

Examples:

(def foo '[a b c])
`(~@foo)
;;=> (a b c)

See Also:

Reader code @ tools.reader:src/main/clojure/clojure/tools/reader.clj
(defn- read-unquote
  [rdr comma opts pending-forms]
  (if-let [ch (peek-char rdr)]
    (if (identical? \@ ch)
      ((wrapping-reader 'clojure.core/unquote-splicing) (doto rdr read-char) \@ opts pending-forms)
      ((wrapping-reader 'clojure.core/unquote) rdr \~ opts pending-forms))))
Reader table @ tools.reader:src/main/clojure/clojure/tools/reader.clj
(defn- macros [ch]
  (case ch
    \" read-string*
    \: read-keyword
    \; read-comment
    \' (wrapping-reader 'quote)
    \@ (wrapping-reader 'clojure.core/deref)
    \^ read-meta
    \` read-syntax-quote ;;(wrapping-reader 'syntax-quote)
    \~ read-unquote
    \( read-list
    \) read-unmatched-delimiter
    \[ read-vector
    \] read-unmatched-delimiter
    \{ read-map
    \} read-unmatched-delimiter
    \\ read-char*
    \% read-arg
    \# read-dispatch
    nil))