~ unquote

syntax

since v0.0-1853

in clojure

Edit

Examples:

(def foo 1)
`~foo
;;=> 1

`(def foo ~foo)
;;=> (def cljs.user/foo 1)

See Also:

• ` syntax quote
• ~@ unquote splicing

(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))))

(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))