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;; Copyright (c) Eduardo Julian. All rights reserved.
;; This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
;; If a copy of the MPL was not distributed with this file,
;; You can obtain one at http://mozilla.org/MPL/2.0/.
(ns lux.host.generics
(:require (clojure [string :as string]
[template :refer [do-template]])
clojure.core.match
clojure.core.match.array
(lux [base :as & :refer [|do return* return fail fail* |let |case]]))
(:import java.util.regex.Pattern))
(do-template [<name> <old-sep> <new-sep>]
(let [regex (-> <old-sep> Pattern/quote re-pattern)]
(defn <name> [old]
(string/replace old regex <new-sep>)))
;; ->class
^String ->bytecode-class-name "." "/"
;; ->class-name
^String ->class-name "/" "."
)
;; ->type-signature
(defn ->type-signature [class]
(case class
"void" "V"
"boolean" "Z"
"byte" "B"
"short" "S"
"int" "I"
"long" "J"
"float" "F"
"double" "D"
"char" "C"
;; else
(let [class* (->bytecode-class-name class)]
(if (.startsWith class* "[")
class*
(str "L" class* ";")))
))
(defn super-class-name [super]
"(-> GenericSuperClassDecl Text)"
(|let [[super-name super-params] super]
super-name))
(defn class-decl-params->signature [params]
(if (&/|empty? params)
""
(str "<" (->> params (&/|interpose " ") (&/fold str "")) ">")))
(defn gclass->signature [super]
"(-> GenericClass Text)"
(|case super
(&/$GenericTypeVar name)
(str "T" name ";")
(&/$GenericWildcard)
"*"
(&/$GenericClass name params)
(case name
"void" "V"
"boolean" "Z"
"byte" "B"
"short" "S"
"int" "I"
"long" "L"
"float" "F"
"double" "D"
"char" "C"
(let [params* (if (&/|empty? params)
""
(str "<" (->> params (&/|map gclass->signature) (&/|interpose " ") (&/fold str "")) ">"))]
(str "L" (->bytecode-class-name name) params* ";")))
(&/$GenericArray param)
(str "[" (gclass->signature param))))
(defn gsuper-decl->signature [super]
"(-> GenericSuperClassDecl Text)"
(|let [[super-name super-params] super
params* (if (&/|empty? super-params)
""
(str "<" (->> super-params (&/|map gclass->signature) (&/|interpose " ") (&/fold str "")) ">"))]
(str "L" (->bytecode-class-name super-name) params* ";")))
(defn gclass-decl->signature [class-decl supers]
"(-> GenericClassDecl (List GenericSuperClassDecl) Text)"
(|let [[class-name class-vars] class-decl
vars-section (class-decl-params->signature class-vars)
super-section (->> (&/|map gsuper-decl->signature supers) (&/|interpose " ") (&/fold str ""))]
(str vars-section super-section)))
(let [object-simple-signature (->type-signature "java.lang.Object")]
(defn gclass->simple-signature [gclass]
"(-> GenericClass Text)"
(|case gclass
(&/$GenericTypeVar name)
object-simple-signature
(&/$GenericWildcard)
object-simple-signature
(&/$GenericClass name params)
(->type-signature name)
(&/$GenericArray param)
(str "[" (gclass->simple-signature param))
_
(assert false (str 'gclass->simple-signature " " (&/adt->text gclass))))))
(defn gclass->class-name [gclass]
"(-> GenericClass Text)"
(|case gclass
(&/$GenericTypeVar name)
(->bytecode-class-name "java.lang.Object")
(&/$GenericWildcard)
(->bytecode-class-name "java.lang.Object")
(&/$GenericClass name params)
(->bytecode-class-name name)
(&/$GenericArray param)
(str "[" (gclass->class-name param))
_
(assert false (str 'gclass->class-name " " (&/adt->text gclass)))))
;; TODO: CLEAN THIS UP, IT'S DOING A HACK BY TREATING GCLASSES AS GVARS
(let [object-bc-name (->bytecode-class-name "java.lang.Object")]
(defn gclass->bytecode-class-name* [gclass type-env]
"(-> GenericClass Text)"
(|case gclass
(&/$GenericTypeVar name)
object-bc-name
(&/$GenericWildcard)
object-bc-name
(&/$GenericClass name params)
(if (&/|get name type-env)
object-bc-name
(->bytecode-class-name name))
(&/$GenericArray param)
(assert false "gclass->bytecode-class-name doesn't work on arrays."))))
(let [object-bc-name (->bytecode-class-name "java.lang.Object")]
(defn gclass->bytecode-class-name [gclass]
"(-> GenericClass Text)"
(|case gclass
(&/$GenericTypeVar name)
object-bc-name
(&/$GenericWildcard)
object-bc-name
(&/$GenericClass name params)
(->bytecode-class-name name)
(&/$GenericArray param)
(assert false "gclass->bytecode-class-name doesn't work on arrays."))))
(defn method-signatures [method-decl]
(|let [[=name =anns =gvars =exceptions =inputs =output] method-decl
simple-signature (str "(" (&/fold str "" (&/|map gclass->simple-signature =inputs)) ")" (gclass->simple-signature =output))
generic-signature (str (if (&/|empty? =gvars)
""
(str "<" (->> =gvars (&/|interpose " ") (&/fold str "")) ">"))
"(" (&/fold str "" (&/|map gclass->signature =inputs)) ")"
(gclass->signature =output)
(->> =exceptions (&/|map gclass->signature) (&/|interpose " ") (&/fold str "")))]
(&/T [simple-signature generic-signature])))
|
