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;; This code was used to generate the clojure.lang.FnInvokers class in
;; Clojure 1.12. This code is not intended to be reused but might be
;; useful in the future as a template for other code gen.
(ns gen-fn-invokers
(:require
[clojure.string :as str]))
(def header
"/**
* Copyright (c) Rich Hickey. All rights reserved.
* The use and distribution terms for this software are covered by the
* Eclipse Public License 1.0 (https://opensource.org/license/epl-1-0)
* 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.
**/
package clojure.lang;
public class FnInvokers {
// Encode invoker param/return class to code for method name
static char encodeInvokerType(Class c) {
if(Long.TYPE.equals(c)) {
return 'L';
} else if(Double.TYPE.equals(c)) {
return 'D';
} else if(Integer.TYPE.equals(c)) {
return 'I';
} else if(Short.TYPE.equals(c)) {
return 'S';
} else if(Byte.TYPE.equals(c)) {
return 'B';
} else if(Float.TYPE.equals(c)) {
return 'F';
} else {
return 'O';
}
}
")
(def footer
"}")
(def invokeO-format
" public static Object invoke%sO(IFn f0%s) {
return f0.invoke(%s);
}")
(def invokeO-with-l-or-d-arg-format
" public static Object invoke%sO(IFn f0%s) {
if(f0 instanceof IFn.%sO) {
return ((IFn.%sO)f0).invokePrim(%s);
} else {
return f0.invoke(%s);
}
}")
(def invokeD-format
" public static double invoke%sD(IFn f0%s) {
if(f0 instanceof IFn.%sD) {
return ((IFn.%sD)f0).invokePrim(%s);
} else {
return RT.doubleCast(f0.invoke(%s));
}
}")
(def invokeF-format
" public static float invoke%sF(IFn f0%s) {
if(f0 instanceof IFn.%sD) {
return RT.floatCast(((IFn.%sD)f0).invokePrim(%s));
} else {
return RT.floatCast(f0.invoke(%s));
}
}")
(def invokeL-format
" public static long invoke%sL(IFn f0%s) {
if(f0 instanceof IFn.%sL) {
return ((IFn.%sL)f0).invokePrim(%s);
} else {
return RT.longCast(f0.invoke(%s));
}
}")
(def invokeI-format
" public static int invoke%sI(IFn f0%s) {
if(f0 instanceof IFn.%sL) {
return RT.intCast(((IFn.%sL)f0).invokePrim(%s));
} else {
return RT.intCast(f0.invoke(%s));
}
}")
(def invokeS-format
" public static short invoke%sS(IFn f0%s) {
if(f0 instanceof IFn.%sL) {
return RT.shortCast(((IFn.%sL)f0).invokePrim(%s));
} else {
return RT.shortCast(f0.invoke(%s));
}
}")
(def invokeB-format
" public static byte invoke%sB(IFn f0%s) {
if(f0 instanceof IFn.%sL) {
return RT.byteCast(((IFn.%sL)f0).invokePrim(%s));
} else {
return RT.byteCast(f0.invoke(%s));
}
}")
(def alphabet (map char (range 97 122)))
(def arg-types {:D ", double "
:L ", long "
:O ", Object "})
(defn gen-invoke [sig]
(let [formatter (str (last sig))
args (map str (butlast sig))
arg-types (map #(get arg-types (keyword %)) args)
fn-vars (str/join "" (map #(str %1 %2) arg-types (take (count args) alphabet)))
fn-vars-sans-type (str/join ", " (take (count args) alphabet))
arg-str (str/join args)]
(case formatter
"O" (if (some #{"D" "L"} args)
(format invokeO-with-l-or-d-arg-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
(format invokeO-format arg-str fn-vars fn-vars-sans-type))
"L" (format invokeL-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
"I" (format invokeI-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
"S" (format invokeS-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
"B" (format invokeB-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
"D" (format invokeD-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type)
"F" (format invokeF-format arg-str fn-vars arg-str arg-str fn-vars-sans-type fn-vars-sans-type))))
(defn sigs [args return-types]
(let [fun-sig-reducer (fn [res ret]
(mapcat seq [res (map (fn [params]
(str params ret)) args)]))]
(reduce fun-sig-reducer [] return-types)))
(defn gen-sigs []
(let [small-rets ["L" "I" "S" "B" "D" "F" "O"]
zero-arity (sigs [""] small-rets)
single-arity (sigs ["L" "D" "O"] small-rets)
two-arity (sigs ["LL" "LO" "OL" "DD" "LD" "DL" "OO" "OD" "DO"] small-rets)
big-rets ["O"]
three-arity (sigs ["OOO"] big-rets)
four-arity (sigs ["OOOO"] big-rets)
five-arity (sigs ["OOOOO"] big-rets)
six-arity (sigs ["OOOOOO"] big-rets)
seven-arity (sigs ["OOOOOOO"] big-rets)
eight-arity (sigs ["OOOOOOOO"] big-rets)
nine-arity (sigs ["OOOOOOOOO"] big-rets)
ten-arity (sigs ["OOOOOOOOOO"] big-rets)]
(mapcat seq [zero-arity single-arity two-arity three-arity four-arity five-arity six-arity seven-arity eight-arity nine-arity ten-arity])))
(defn gen-invokers []
(let [sb (StringBuilder. ^String header)
invoker-signatures (gen-sigs)]
(doseq [sig invoker-signatures]
(.append sb (gen-invoke sig))
(.append sb "\n\n"))
(.append sb footer)
(spit "src/jvm/clojure/lang/FnInvokers.java" (.toString sb))))
(comment
(gen-invokers)
)
|
