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1.3.0 permalink

1.2.0
1.3.0

with-in-str

clojure.core

(with-in-str s & body)

Evaluates body in a context in which *in* is bound to a fresh
StringReader initialized with the string s.

1 Example top

link | changes
```
;; Given you have a function that will read from *in*
(defn prompt [question]
  (println question)
  (read-line))

user=> (prompt "How old are you?")
How old are you?
34                   ; <== This is what you enter
"34"                 ; <== This is returned by the function

;; You can now simulate entering your age at the prompt by using with-in-str

user=> (with-in-str "34" (prompt "How old are you?"))
How old are you?
"34"                 ; <== The function now returns immediately 
```
;; Given you have a function that will read from *in* (defn prompt [question] (println question) (read-line)) user=> (prompt "How old are you?") How old are you? 34 ; <== This is what you enter "34" ; <== This is returned by the function ;; You can now simulate entering your age at the prompt by using with-in-str user=> (with-in-str "34" (prompt "How old are you?")) How old are you? "34" ; <== The function now returns immediately

Source clojure/core.clj:4177 top

(defmacro with-in-str
  "Evaluates body in a context in which *in* is bound to a fresh
  StringReader initialized with the string s."
  {:added "1.0"}
  [s & body]
  `(with-open [s# (-> (java.io.StringReader. ~s) clojure.lang.LineNumberingPushbackReader.)]
     (binding [*in* s#]
       ~@body)))

Vars in clojure.core/with-in-str:

Used in 0 other vars

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Clojure Core

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with-in-str

clojure.core

1 Example top

See Also top

Source clojure/core.clj:4177 top

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