    Copyright ( c )   , Rich Hickey & contributors .
;;   The use and distribution terms for this software are covered by the
;;   Eclipse Public License 1.0 (-1.0.php)
;;   which can be found in the file epl-v10.html at the root of this distribution.
;;   By using this software in any fashion, you are agreeing to be bound by
;;   the terms of this license.
;;   You must not remove this notice, or any other, from this software.

(ns cljs.tools.reader.impl.utils
  (:refer-clojure :exclude [char])
  (:require
   [clojure.string :as string]
   [goog.string :as gstring]))

(defn char [x]
  (when-not (nil? x)
    (cljs.core/char x)))

(defn ^boolean ex-info? [ex]
  (instance? cljs.core.ExceptionInfo ex))

(defrecord ReaderConditional [splicing? form])

(defn ^boolean reader-conditional?
  "Return true if the value is the data representation of a reader conditional"
  [value]
  (instance? ReaderConditional value))

(defn reader-conditional
  "Construct a data representation of a reader conditional.
  If true, splicing? indicates read-cond-splicing."
  [form splicing?]
  (ReaderConditional. splicing? form))

(extend-protocol IPrintWithWriter
  ReaderConditional
  (-pr-writer [coll writer opts]
    (-write writer (str "#?" (when (:splicing? coll) "@")))
    (pr-writer (:form coll) writer opts)))

(def ws-rx #"[\s]")

(defn ^boolean whitespace?
  "Checks whether a given character is whitespace"
  [ch]
  (when-not (nil? ch)
    (if (identical? ch \,)
      true
      (.test ws-rx ch))))

(defn ^boolean numeric?
  "Checks whether a given character is numeric"
  [ch]
  (when-not (nil? ch)
    (gstring/isNumeric ch)))

(defn ^boolean newline?
  "Checks whether the character is a newline"
  [c]
  (or (identical? \newline c)
      (identical? "\n" c)
      (nil? c)))

(defn desugar-meta
  "Resolves syntactical sugar in metadata" ;; could be combined with some other desugar?
  [f]
  (cond
    (keyword? f) {f true}
    (symbol? f)  {:tag f}
    (string? f)  {:tag f}
    :else        f))

(def last-id (atom 0))

(defn next-id
  []
  (swap! last-id inc))

   The use and distribution terms for this software are covered by the
   Eclipse Public License 1.0 (-1.0.php)
   which can be found in the file epl-v10.html at the root of this distribution.
   By using this software in any fashion, you are agreeing to be bound by
   the terms of this license.
   You must not remove this notice, or any other, from this software.
 could be combined with some other desugar?
    Copyright ( c )   , Rich Hickey & contributors .

(ns cljs.tools.reader.impl.utils
  (:refer-clojure :exclude [char])
  (:require
   [clojure.string :as string]
   [goog.string :as gstring]))

(defn char [x]
  (when-not (nil? x)
    (cljs.core/char x)))

(defn ^boolean ex-info? [ex]
  (instance? cljs.core.ExceptionInfo ex))

(defrecord ReaderConditional [splicing? form])

(defn ^boolean reader-conditional?
  "Return true if the value is the data representation of a reader conditional"
  [value]
  (instance? ReaderConditional value))

(defn reader-conditional
  "Construct a data representation of a reader conditional.
  If true, splicing? indicates read-cond-splicing."
  [form splicing?]
  (ReaderConditional. splicing? form))

(extend-protocol IPrintWithWriter
  ReaderConditional
  (-pr-writer [coll writer opts]
    (-write writer (str "#?" (when (:splicing? coll) "@")))
    (pr-writer (:form coll) writer opts)))

(def ws-rx #"[\s]")

(defn ^boolean whitespace?
  "Checks whether a given character is whitespace"
  [ch]
  (when-not (nil? ch)
    (if (identical? ch \,)
      true
      (.test ws-rx ch))))

(defn ^boolean numeric?
  "Checks whether a given character is numeric"
  [ch]
  (when-not (nil? ch)
    (gstring/isNumeric ch)))

(defn ^boolean newline?
  "Checks whether the character is a newline"
  [c]
  (or (identical? \newline c)
      (identical? "\n" c)
      (nil? c)))

(defn desugar-meta
  [f]
  (cond
    (keyword? f) {f true}
    (symbol? f)  {:tag f}
    (string? f)  {:tag f}
    :else        f))

(def last-id (atom 0))

(defn next-id
  []
  (swap! last-id inc))
