Ruby-like string interpolation in Clojure

ruby-fmt.clj

; Ruby has an awesome feature -- string interpolation. Read about it on the internet.
; On the other hand, Clojure only has cumbersome Java string formatting, which can not be
; used without pain after you've tried Ruby.

; So here's this simple macro that basically allows you to do most things you could do
; with Ruby string interpolation in Clojure.

(ns eis.stuff
  (:require [clojure.string]))

(defmacro fmt [^String string]
  (let [-re #"#\{(.*?)\}"
        fstr (clojure.string/replace string -re "%s")
        fargs (map #(read-string (second %)) (re-seq -re string))]
    `(format ~fstr ~@fargs)))

;; test the macro

(def name "Mister")
(def surname "Metaphor")
(def seq [1 2 3])

(println (fmt "Hello #{name} #{(clojure.string/join \" \" surname)}!"))
(println (fmt "Frist element of #{seq} is #{(first seq)}!"))

Батька :)

Ahoy, fellow interpolist. We use many of the same tricks :-)

Was exactly my thought! :D
BTW, I didn't know there's already a macro for interpolation in the contrib? It's called <<. Source: https://github.com/clojure/clojure-contrib/blob/62078f31f425a0bf4be6508a51ac1fa8ce09ea51/src/main/clojure/clojure/contrib/strint.clj#L49
After been pointed out to that code I felt like I've just reinvented the bicycle about my creation.

Sure, it's in old contrib, but our stuff is way better!

At least you have an understanding on how it's done!

Where is that macro in the realms of the new contrib which is now modular?

It's in clojure.core.strint : https://github.com/clojure/core.incubator/blob/master/src/main/clojure/clojure/core/strint.clj , it's updated even.

No, my mistake, it's the same macro from old contrib.

that's why I love this language :)