Add support for Clojurescript

Many changes were done in order to accomplish this, however the core library
still intact. The following changes were done:

* Rename monads.test.core to monads.test.core-tests to be
  easily identified on open buffers (not having to explore the path
* Move the do macro to monads.macro namespace
* Add dev-dependencies and plugins:
  - lein-cljsbuild
  - lein-dalap
  - buster-cljs
* Test suites run successfuly both in JVM and in Javascript (including optimized version)
* Add .travis.yml automated test
* Remove reify usage because of strange bugs in cljs

.gitignore

@@ -0,0 +1,7 @@
+.lein-*
+node_modules/
+resources/js/protocol_monads_dev.js
+resources/js/protocol_monads_browser_test.js
+resources/js/protocol_monads_browser_optimized_test.js
+resources/js/protocol_monads_node_test.js
+target/

.travis.yml

@@ -0,0 +1,22 @@
+language:
+  - node_js
+  - clojure
+lein: lein2
+jdk:
+  - oraclejdk7
+node_js:
+  - "0.8"
+before_script:
+  - "export DISPLAY=:99:0"
+  - "echo 'Compile to javascript'"
+  - "lein2 cljsbuild once"
+  - "echo 'Starting buster server'"
+  - "./node_modules/buster/bin/buster-server &"
+  - "sleep 3"
+  - "echo 'Done.'"
+  - "echo 'Starting phantomjs server'"
+  - "phantomjs ./node_modules/buster/script/phantom.js &"
+  - "sleep 3"
+  - "echo 'Done.'"
+script:
+  - lein2 test && npm test

buster.js

@@ -0,0 +1,14 @@
+var config = exports;
+
+config['Browser Tests'] = {
+    environment: 'browser',
+    sources: [],
+    tests: [ "resources/js/protocol_monads_browser_test.js"
+           , "resources/js/protocol_monads_browser_optimized_test.js" ]
+};
+
+config['Node Tests'] = {
+    environment: 'node',
+    sources: [],
+    tests: ["resources/js/protocol_monads_node_test.js"]
+};

dalap_rules.clj

@@ -0,0 +1,14 @@
+{
+  ["src/clj/monads/core.clj" "src/cljs/monads/core.cljs"]
+  ['clojure.lang.PersistentList 'List
+   'clojure.lang.PersistentList$EmptyList 'EmptyList
+   'clojure.lang.PersistentVector 'PersistentVector
+   'clojure.lang.PersistentHashSet 'PersistentHashSet
+   'clojure.lang.LazySeq 'LazySeq
+   'clojure.lang.IFn 'IFn
+   'clojure.lang.IDeref 'IDeref
+   'deref '-deref
+   'invoke '-invoke]
+  ["test/clj/monads/test/core_test.clj" "test/cljs/monads/test/core_test.cljs"]
+  []
+}

package.json

@@ -0,0 +1,8 @@
+{
+    "name": "protocol-monads",
+    "description": "",
+    "version": "1.0.0",
+    "author": "",
+    "dependencies" : { "buster" : "0.6.12" },
+    "scripts": { "test": "buster-test -e node && buster-test -e browser" }
+}

project.clj

@@ -1,3 +1,43 @@
-(defproject net.clojure/monads "1.0.0"
+(defproject net.clojure/monads "1.0.1-SNAPSHOT"
   :description "A protocol based implementation of monads"
-  :dependencies [[org.clojure/clojure "1.4.0"]])
+  :dependencies [[org.clojure/clojure "1.4.0"]]
+  :source-paths ["src/clj"]
+  :test-paths ["test/clj"]
+  :profiles {:dev {:dependencies [[com.birdseye-sw/buster-cljs "0.1.0"]]
+                   :plugins [[lein-cljsbuild "0.2.9"]
+                             [com.birdseye-sw/lein-dalap "0.1.0"]]}}
+  :hooks [leiningen.dalap]
+
+  :cljsbuild
+  {:builds
+   [{:id :dev
+     :source-path "src/cljs"
+     :compiler
+     {:output-to "resources/js/protocol_monads_dev.js"
+      :optimizations :simple
+      :pretty-print true}}
+    {:id :browser-test
+     :source-path "test/cljs"
+     :compiler
+     {:output-to "resources/js/protocol_monads_browser_test.js"
+      :libraries ["resources/js/protocol_monads_dev.js"]
+      :externs ["externs/buster.js"]
+      :optimizations :simple
+      :pretty-print true}}
+    {:id :browser-test-optimized
+     :source-path "test/cljs"
+     :compiler
+     {:output-to "resources/js/protocol_monads_browser_optimized_test.js"
+      :libraries ["resources/js/protocol_monads_dev.js"]
+      :externs ["externs/buster.js"]
+      :optimizations :advanced}}
+    {:id :node-test
+     :source-path "test/cljs"
+     :compiler
+     {:output-to "resources/js/protocol_monads_node_test.js"
+      :libraries ["resources/js/protocol_monads_dev.js"]
+      :externs ["externs/buster.js"]
+      :optimizations :simple
+      :pretty-print true}}]}
+
+  )

src/monads/core.clj → src/clj/monads/core.clj

@@ -6,6 +6,7 @@
 ;   the terms of this license.
 ;   You must not remove this notice, or any other, from this software.
 
+
 (ns monads.core
   (:refer-clojure :exclude [do seq map])
   (:require [clojure.set :as set]))
@@ -21,33 +22,6 @@
 (defn plus [[mv & mvs]]
   (plus-step mv mvs))
 
-(defmacro do
-  "Monad comprehension. Takes the name of a monad (like vector, hash-set),
-   a vector of steps given as binding-form/monadic-expression pairs, and
-   a result value specified by expr. The monadic-expression terms can use
-   the binding variables of the previous steps.
-   If the monad contains a definition of m-zero, the step list can also
-   contain conditions of the form :when p, where the predicate p can
-   contain the binding variables from all previous steps.
-   A clause of the form :let [binding-form expr ...], where the bindings
-   are given as a vector as for the use in let, establishes additional
-   bindings that can be used in the following steps."
-  [result bindings expr]
-  (let [steps (partition 2 bindings)]
-    `(monads.core/bind (~result nil)
-                       (fn [_#]
-                         ~(reduce (fn [expr [sym mv]]
-                                    (cond
-                                     (= :when sym) `(if ~mv
-                                                      ~expr
-                                                      (monads.core/zero (~result nil)))
-                                     (= :let sym) `(let ~mv
-                                                     ~expr)
-                                     :else `(monads.core/bind ~mv (fn [~sym]
-                                                                     ~expr))))
-                                  `(monads.core/do-result (~result nil) ~expr)
-                                  (reverse steps))))))
-
 (defn- comprehend [f mvs]
   (let [mv (first mvs)
         rest-steps (reduce (fn [steps mv]
@@ -138,7 +112,8 @@
   (writer-m-combine [c1 c2] (concat c1 c2)))
 
 ;; Monads describing multi-valued computations, i.e. computations
-;; that can yield multiple values. 
+;; that can yield multiple values.
+
 (extend-type clojure.lang.PersistentList$EmptyList
   Monad
   (do-result [_ v]
@@ -185,6 +160,27 @@
        (clojure.core/seq ls) (lazy-concat (first l) (rest ls))
        :else (list)))))
 
+
+#_(:cljs
+   (extend-type Range
+     Monad
+     (do-result [_ v]
+       (list v))
+     (bind [mv f]
+       (mapcat f mv))
+
+     MonadZero
+     (zero [_]
+       [])
+     (plus-step [mv mvs]
+       (lazy-concat mv mvs))
+
+     MonadWriter
+     (writer-m-empty [_] (list))
+     (writer-m-add [c v] (conj c v))
+     (writer-m-combine [c1 c2] (concat c1 c2))))
+
+
 (extend-type clojure.lang.LazySeq
   Monad
   (do-result [_ v]
@@ -281,20 +277,21 @@
   [v]
   (state-monad. v nil nil))
 
+(deftype StateMonadFn [f]
+  clojure.lang.IFn
+  (invoke [_ s]
+    [s (f s)])
+  Monad
+  (do-result [_ v]
+    (state-monad. v nil nil))
+  (bind [mv f1]
+    (state-monad. nil mv f1)))
+
 (defn update-state
   "Return a state-monad value that replaces the current state by the
    result of f applied to the current state and that returns the old state."
   [f]
-  (reify
-    clojure.lang.IFn
-    (invoke [_ s]
-      [s (f s)])
-
-    Monad
-    (do-result [_ v]
-      (state-monad. v nil nil))
-    (bind [mv f]
-      (state-monad. nil mv f))))
+  (StateMonadFn. f))
 
 (defn set-state
   "Return a state-monad value that replaces the current state by s and

src/clj/monads/macros.clj

@@ -0,0 +1,35 @@
+;   Copyright (c) Jim Duey. All rights reserved.
+;   The use and distribution terms for this software are covered by the
+;   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-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 monads.macros)
+
+(defmacro do
+  "Monad comprehension. Takes the name of a monad (like vector, hash-set),
+   a vector of steps given as binding-form/monadic-expression pairs, and
+   a result value specified by expr. The monadic-expression terms can use
+   the binding variables of the previous steps.
+   If the monad contains a definition of m-zero, the step list can also
+   contain conditions of the form :when p, where the predicate p can
+   contain the binding variables from all previous steps.
+   A clause of the form :let [binding-form expr ...], where the bindings
+   are given as a vector as for the use in let, establishes additional
+   bindings that can be used in the following steps."
+  [result bindings expr]
+  (let [steps (partition 2 bindings)]
+    `(monads.core/bind (~result nil)
+                       (fn [_#]
+                         ~(reduce (fn [expr [sym mv]]
+                                    (cond
+                                     (= :when sym) `(if ~mv
+                                                      ~expr
+                                                      (monads.core/zero (~result nil)))
+                                     (= :let sym) `(let ~mv
+                                                     ~expr)
+                                     :else `(monads.core/bind ~mv (fn [~sym]
+                                                                    ~expr))))
+                                  `(monads.core/do-result (~result nil) ~expr)
+                                  (reverse steps))))))