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(ns tojs
(:import (clojure.lang Compiler Compiler$C))
(:require [clojure.contrib.duck-streams :as ds]))
(defn vstr [v]
(let [sb (StringBuilder.)
lvl (fn lvl [v]
(doseq i v
(if (vector? i)
(lvl i)
(.append sb (str i)))))]
(lvl v)
(str sb)))
(def *arity-check* false)
(defmulti tojs (fn [e ctx] (class e)))
(defmethod tojs clojure.lang.Var [e ctx]
(let [{:keys [name ns]} ^e]
(str (Compiler/munge (str (.getName ns))) "." (Compiler/munge (str name)))))
(defmethod tojs clojure.lang.Compiler$DefExpr [e ctx]
(str (tojs (.var e) ctx) "=" (tojs (.init e) ctx) ";\n"))
(defn fnmethod [fm maxm ctx]
(let [lm (into {} (map (fn [[lb lb] i] [lb (str (.name lb) "_" i)])
(.locals fm) (iterate inc 0)))
thisfn (some #(when (= (.name %) (:fnname ctx)) %) (keys lm))
mainvars (vals (reduce dissoc lm (cons thisfn (when (= fm maxm)
(.reqParms fm)))))]
(.reqParms maxm)
(vstr [(when mainvars ["var " (vec (interpose "," mainvars)) ";\n"])
(when thisfn ["var " (lm thisfn) "=arguments.callee;\n"])
(when (not= fm maxm)
(vec (for [lb (.reqParms fm)]
[(lm lb) "=arguments[" (dec (.idx lb)) "];\n"])))
(when-let lb (.restParm fm)
["var " (lm lb) "=clojure.JS.rest_args(arguments,"
(count (.reqParms fm)) ");\n"])
"var _rtn,_cnt;do{_cnt=0;\n_rtn="
(tojs (.body fm) (merge-with merge ctx {:localmap lm}))
";\n}while(_cnt);return _rtn;"])))
(defmethod tojs clojure.lang.Compiler$FnExpr [e ctx]
(let [maxm (or (.variadicMethod e)
(-> (into (sorted-map)
(for [fm (.methods e)
:when (not= fm (.variadicMethod e))]
[(count (.reqParms fm)) fm]))
last val))
manym (< 1 (count (.methods e)))
newctx (assoc ctx :fnname (.thisName e))]
(vstr ["(function("
(vec (interpose "," (map #(vector (.name %) "_" (.idx %))
(.reqParms maxm))))
"){\n"
(vec (for [fm (.methods e) :when (not= fm (.variadicMethod e))]
[(when manym
["if(arguments.length==" (count (.reqParms fm)) "){\n"])
(fnmethod fm maxm newctx)
(when manym "}\n")]))
(if (.variadicMethod e)
[(fnmethod (.variadicMethod e) maxm newctx) "\n"]
(when *arity-check*
["throw \"Wrong number of args passed to: "
(.thisName e) "\";\n"]))
"})"])))
(defmethod tojs clojure.lang.Compiler$BodyExpr [e ctx]
(apply str (interpose ",\n" (map #(tojs % ctx) (.exprs e)))))
(defmethod tojs clojure.lang.Compiler$LetExpr [e ctx]
(let [inits (vec (for [bi (.bindingInits e)]
["(" ((:localmap ctx) (.binding bi))
"=" (tojs (.init bi) ctx) "),\n"]))]
(if (.isLoop e)
(vstr ["((function(){var _rtn,_cnt;"
inits "0;"
"do{_cnt=0;\n_rtn=" (tojs (.body e) ctx)
"}while(_cnt);return _rtn;})())"])
(vstr ["(" inits (tojs (.body e) ctx) ")"]))))
(defmethod tojs clojure.lang.Compiler$VectorExpr [e ctx]
(vstr ["clojure.JS.lit_vector(["
(vec (interpose "," (map #(tojs % ctx) (.args e))))
"])"]))
(defn const-str [c]
(cond
(string? c) (str \" c \")
(keyword? c) (str \" c \")
(symbol? c) (str \" \' c \")
(class? c) (.getCanonicalName c)
(list? c) (vstr ["clojure.JS.lit_list(["
(vec (interpose "," (map const-str c)))
"])"])
:else (str c)))
(defmethod tojs clojure.lang.Compiler$ConstantExpr [e ctx]
(const-str (.v e)))
(defmethod tojs clojure.lang.Compiler$UnresolvedVarExpr [e ctx]
(vstr ["clojure.JS.resolveVar("
(if-let ns (namespace (.symbol e))
[\" (Compiler/munge ns) \"]
"null")
",\"" (Compiler/munge (name (.symbol e)))
"\"," (Compiler/munge (name (.name *ns*)))
")"]))
(defmethod tojs clojure.lang.Compiler$InvokeExpr [e ctx]
(vstr [(tojs (.fexpr e) ctx)
"("
(vec (interpose "," (map #(tojs % ctx) (.args e))))
")"]))
(defmethod tojs clojure.lang.Compiler$LocalBindingExpr [e ctx]
((:localmap ctx) (.b e)))
(defmethod tojs clojure.lang.Compiler$NilExpr [e ctx]
"null")
(defmethod tojs clojure.lang.Compiler$EmptyExpr [e ctx]
(str (.getCanonicalName (class (.coll e))) ".EMPTY"))
(defmethod tojs clojure.lang.Compiler$StringExpr [e ctx]
(const-str (.str e)))
(defmethod tojs clojure.lang.Compiler$VarExpr [e ctx]
(tojs (.var e) ctx))
(defmethod tojs clojure.lang.Compiler$TheVarExpr [e ctx]
; XXX not really right
(tojs (.var e) ctx))
(defmethod tojs clojure.lang.Compiler$KeywordExpr [e ctx]
(const-str (.k e)))
(defmethod tojs clojure.lang.Compiler$StaticFieldExpr [e ctx]
(str (.getCanonicalName (.c e)) "." (.fieldName e)))
(defmethod tojs clojure.lang.Compiler$StaticMethodExpr [e ctx]
(vstr [(.getCanonicalName (.c e)) "." (.methodName e) "("
(vec (interpose "," (map #(tojs % ctx) (.args e))))
")"]))
(defmethod tojs clojure.lang.Compiler$NewExpr [e ctx]
(vstr ["(new " (.getCanonicalName (.c e)) "("
(vec (interpose "," (map #(tojs % ctx) (.args e))))
"))"]))
(defmethod tojs clojure.lang.Compiler$InstanceMethodExpr [e ctx]
(vstr ["(" (tojs (.target e) ctx) ")." (.methodName e)
"(" (vec (interpose "," (map #(tojs % ctx) (.args e)))) ")"]))
(defmethod tojs clojure.lang.Compiler$InstanceFieldExpr [e ctx]
(vstr ["(" (tojs (.target e) ctx) ")." (.fieldName e)]))
(defmethod tojs clojure.lang.Compiler$IfExpr [e ctx]
(str "((" (tojs (.testExpr e) ctx)
")?(" (tojs (.thenExpr e) ctx)
"):(" (tojs (.elseExpr e) ctx) "))"))
(defmethod tojs clojure.lang.Compiler$RecurExpr [e ctx]
(vstr ["(_cnt=1"
(vec (map #(str ",_t" %2 "=" (tojs %1 ctx)) (.args e) (iterate inc 0)))
(vec (map #(str "," ((:localmap ctx) %1) "=_t" %2)
(.loopLocals e) (iterate inc 0)))
")"]))
(defmethod tojs clojure.lang.Compiler$MapExpr [e ctx]
(vstr ["clojure.lang.HashMap.create(["
(vec (interpose "," (map #(tojs % ctx) (.keyvals e))))
"])"]))
(defmethod tojs clojure.lang.Compiler$SetExpr [e ctx]
(vstr ["clojure.lang.HashSet.create(["
(vec (interpose "," (map #(tojs % ctx) (.keys e))))
"])"]))
(defmethod tojs clojure.lang.Compiler$BooleanExpr [e ctx]
(if (.val e) "true" "false"))
(defmethod tojs clojure.lang.Compiler$AssignExpr [e ctx]
(vstr ["(" (tojs (.target e) ctx) "=" (tojs (.val e) ctx) ")"]))
(defmethod tojs clojure.lang.Compiler$ThrowExpr [e ctx]
(vstr ["(function(){throw " (tojs (.excExpr e) ctx) "})()"]))
(defmethod tojs clojure.lang.Compiler$TryExpr [e ctx]
(vstr ["(function(){try{var _rtn="
(tojs (.tryExpr e) ctx)
"}"
(when (seq (.catchExprs e))
(when (not= 1 (count (.catchExprs e)))
(throw (Exception. "tojs only supports one catch clause per try")))
(let [cc (first (.catchExprs e))]
["\ncatch(" ((:localmap ctx) (.lb cc)) "){_rtn="
(tojs (.handler e) ctx)
"}"]))
(when (.finallyExpr e)
["\nfinally{"
(tojs (.finallyExpr e) ctx)
"}"])
"})()"]))
(defn formtojs [f]
(binding [*allow-unresolved-vars* true]
(str (tojs (Compiler/analyze Compiler$C/STATEMENT `((fn [] ~f)))
{:localmap {}})
";\n")))
(defn testboot []
(let [boot "/home/chouser/build/clojure/src/clj/clojure/boot.clj"
bootreader (java.io.PushbackReader. (ds/reader boot))
tmpns (create-ns 'tmp)]
(binding [*ns* tmpns]
(eval '(def identical? clojure/identical?))
(eval '(def *ns* nil))
(eval '(def *in* nil))
(eval '(def *out* nil))
(eval '(def *flush-on-newline* nil))
(eval '(def *print-readably* nil))
(eval '(def *agent* nil)))
(loop []
(when-let f (read bootreader)
(println "======")
(prn f)
(println "---")
(binding [*ns* tmpns]
(println (formtojs f))
(eval f))
(recur)))))
(defn filetojs [filename]
(let [reader (java.io.PushbackReader. (ds/reader filename))]
(binding [*ns* (create-ns 'tmp)]
(loop []
(when-let f (try (read reader) (catch Exception e nil))
(println "//======")
(print "//")
(prn f)
(println "//---")
(println (formtojs f))
(when (= 'ns (first f))
(eval f))
(recur))))))
(defn simple-tests []
(println (formtojs
'(defn foo
([a b c & d] (prn 3 a b c))
([c];
;(String/asd "hello")
;(.foo 55)
(let [[a b] [1 2]]
(prn a b c)
"hi")))))
(println (formtojs
'(defn foo [a]
(prn "hi")
(let [a 5]
(let [a 10]
(prn "yo")
(prn a))
(prn a))
(prn a))))
(println (formtojs
'(defn x [] (conj [] (loop [i 5] (if (pos? i) (recur (- i 2)) i))))))
;(println (formtojs '(binding [*out* 5] (set! *out* 10))))
(println (formtojs '(.replace "a/b/c" "/" ".")))
(println (formtojs '(list '(1 "str" 'sym :key) 4 "str2" 6 #{:set 9 8})))
(println (formtojs '(fn forever[] (forever)))))
;(simple-tests)
;(testboot)
(filetojs "t01.cljs")
|
