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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.compiler.lux
(:require (clojure [string :as string]
[set :as set]
[template :refer [do-template]])
clojure.core.match
clojure.core.match.array
(lux [base :as & :refer [|do return* return fail fail* |let |case]]
[type :as &type]
[lexer :as &lexer]
[parser :as &parser]
[analyser :as &analyser]
[host :as &host])
[lux.host.generics :as &host-generics]
(lux.analyser [base :as &a]
[module :as &a-module]
[meta :as &a-meta])
(lux.compiler [base :as &&]
[lambda :as &&lambda]
[type :as &&type]))
(:import (org.objectweb.asm Opcodes
Label
ClassWriter
MethodVisitor)))
;; [Exports]
(defn compile-bool [compile ?value]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (.visitFieldInsn *writer* Opcodes/GETSTATIC "java/lang/Boolean" (if ?value "TRUE" "FALSE") "Ljava/lang/Boolean;")]]
(return &/unit-tag)))
(do-template [<name> <class> <sig> <caster>]
(defn <name> [compile value]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (doto *writer*
(.visitTypeInsn Opcodes/NEW <class>)
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (<caster> value))
(.visitMethodInsn Opcodes/INVOKESPECIAL <class> "<init>" <sig>))]]
(return &/unit-tag)))
compile-int "java/lang/Long" "(J)V" long
compile-real "java/lang/Double" "(D)V" double
compile-char "java/lang/Character" "(C)V" char
)
(defn compile-text [compile ?value]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (.visitLdcInsn *writer* ?value)]]
(return &/unit-tag)))
(defn compile-tuple [compile ?elems]
(|do [^MethodVisitor *writer* &/get-writer
:let [num-elems (&/|length ?elems)]]
(|case num-elems
0
(|do [:let [_ (.visitLdcInsn *writer* &/unit-tag)]]
(return &/unit-tag))
1
(compile (&/|head ?elems))
_
(|do [:let [_ (doto *writer*
(.visitLdcInsn (int (inc num-elems)))
(.visitTypeInsn Opcodes/ANEWARRAY "java/lang/Object"))]
_ (&/map2% (fn [idx elem]
(|do [:let [_ (doto *writer*
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int idx)))]
ret (compile elem)
:let [_ (.visitInsn *writer* Opcodes/AASTORE)]]
(return ret)))
(&/|range num-elems) ?elems)
:let [_ (doto *writer*
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int num-elems))
(.visitLdcInsn &/product-tag)
(.visitInsn Opcodes/AASTORE))]]
(return &/unit-tag)))))
(defn compile-variant [compile ?tag tail? ?value]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (doto *writer*
(.visitLdcInsn (int 4))
(.visitTypeInsn Opcodes/ANEWARRAY "java/lang/Object")
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 0))
(.visitLdcInsn &/sum-tag)
(.visitInsn Opcodes/AASTORE)
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 1))
(.visitLdcInsn (int ?tag))
(&&/wrap-int)
(.visitInsn Opcodes/AASTORE)
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 2))
(.visitFieldInsn Opcodes/GETSTATIC "java/lang/Boolean" (if tail? "TRUE" "FALSE") "Ljava/lang/Boolean;")
(.visitInsn Opcodes/AASTORE)
(.visitInsn Opcodes/DUP)
(.visitLdcInsn (int 3)))]
_ (compile ?value)
:let [_ (.visitInsn *writer* Opcodes/AASTORE)]]
(return &/unit-tag)))
(defn compile-local [compile ?idx]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (.visitVarInsn *writer* Opcodes/ALOAD (int ?idx))]]
(return &/unit-tag)))
(defn compile-captured [compile ?scope ?captured-id ?source]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (doto *writer*
(.visitVarInsn Opcodes/ALOAD 0)
(.visitFieldInsn Opcodes/GETFIELD
(str (&host/->module-class (&/|head ?scope)) "/" (&host/location (&/|tail ?scope)))
(str &&/closure-prefix ?captured-id)
"Ljava/lang/Object;"))]]
(return &/unit-tag)))
(defn compile-global [compile ?owner-class ?name]
(|do [^MethodVisitor *writer* &/get-writer
:let [_ (.visitFieldInsn *writer* Opcodes/GETSTATIC (str (&host/->module-class ?owner-class) "/" (&host/def-name ?name)) &/value-field "Ljava/lang/Object;")]]
(return &/unit-tag)))
(defn compile-apply [compile ?fn ?args]
(|do [^MethodVisitor *writer* &/get-writer
_ (compile ?fn)
_ (&/map% (fn [?arg]
(|do [=arg (compile ?arg)
:let [_ (.visitMethodInsn *writer* Opcodes/INVOKEINTERFACE &&/function-class "apply" &&/apply-signature)]]
(return =arg)))
?args)]
(return &/unit-tag)))
(defn ^:private compile-def-type [compile ?body]
(|do [:let [?def-type (|case ?body
[[?def-type ?def-cursor] (&a/$ann ?def-value ?type-expr ?def-value-type)]
?type-expr
[[?def-type ?def-cursor] ?def-value]
(if (&type/type= &type/Type ?def-type)
(&/T [(&/T [?def-type ?def-cursor])
(&/V &a/$tuple (&/|list))])
(&&type/type->analysis ?def-type)))]]
(compile ?def-type)))
(defn ^:private compile-def-meta [compile ?meta]
(|let [analysis (&&type/defmeta->analysis ?meta)]
(compile analysis)))
(let [class-flags (+ Opcodes/ACC_PUBLIC Opcodes/ACC_FINAL Opcodes/ACC_SUPER)
field-flags (+ Opcodes/ACC_PUBLIC Opcodes/ACC_FINAL Opcodes/ACC_STATIC)]
(defn compile-def [compile ?name ?body ?meta]
(|do [module-name &/get-module-name
class-loader &/loader]
(|case (&a-meta/meta-get &a-meta/alias-tag ?meta)
(&/$Some (&/$IdentM [r-module r-name]))
(if (= 1 (&/|length ?meta))
(|do [:let [current-class (&host-generics/->class-name (str (&host/->module-class r-module) "/" (&host/def-name r-name)))
def-class (&&/load-class! class-loader current-class)
def-type (-> def-class (.getField &/type-field) (.get nil))
def-meta ?meta
def-value (-> def-class (.getField &/value-field) (.get nil))]
_ (&a-module/define module-name ?name def-type def-meta def-value)]
(return &/unit-tag))
(fail (str "[Compilation Error] Aliases cannot contain meta-data: " module-name ";" ?name)))
(&/$Some _)
(fail "[Compilation Error] Invalid syntax for lux;alias meta-data. Must be an Ident.")
_
(|do [:let [=value-type (&a/expr-type* ?body)]
^ClassWriter *writer* &/get-writer
[file-name _ _] &/cursor
:let [datum-sig "Ljava/lang/Object;"
def-name (&host/def-name ?name)
current-class (str (&host/->module-class module-name) "/" def-name)
=class (doto (new ClassWriter ClassWriter/COMPUTE_MAXS)
(.visit &host/bytecode-version class-flags
current-class nil "java/lang/Object" (into-array [&&/function-class]))
(-> (.visitField field-flags &/name-field "Ljava/lang/String;" nil ?name)
(doto (.visitEnd)))
(-> (.visitField field-flags &/type-field datum-sig nil nil)
(doto (.visitEnd)))
(-> (.visitField field-flags &/meta-field datum-sig nil nil)
(doto (.visitEnd)))
(-> (.visitField field-flags &/value-field datum-sig nil nil)
(doto (.visitEnd)))
(.visitSource file-name nil))]
_ (&/with-writer (.visitMethod =class Opcodes/ACC_PUBLIC "<clinit>" "()V" nil nil)
(|do [^MethodVisitor **writer** &/get-writer
:let [_ (.visitCode **writer**)]
_ (compile-def-type compile ?body)
:let [_ (.visitFieldInsn **writer** Opcodes/PUTSTATIC current-class &/type-field datum-sig)]
_ (compile-def-meta compile ?meta)
:let [_ (.visitFieldInsn **writer** Opcodes/PUTSTATIC current-class &/meta-field datum-sig)]
_ (compile ?body)
:let [_ (.visitFieldInsn **writer** Opcodes/PUTSTATIC current-class &/value-field datum-sig)]
:let [_ (doto **writer**
(.visitInsn Opcodes/RETURN)
(.visitMaxs 0 0)
(.visitEnd))]]
(return &/unit-tag)))
:let [_ (.visitEnd *writer*)]
_ (&&/save-class! def-name (.toByteArray =class))
:let [def-class (&&/load-class! class-loader (&host-generics/->class-name current-class))
[def-type is-type?] (|case (&a-meta/meta-get &a-meta/type?-tag ?meta)
(&/$Some (&/$BoolM true))
(&/T [&type/Type
true])
_
(if (&type/type= &type/Type =value-type)
(&/T [&type/Type
false])
(&/T [(-> def-class (.getField &/type-field) (.get nil))
false])))
def-meta ?meta
def-value (-> def-class (.getField &/value-field) (.get nil))]
_ (&a-module/define module-name ?name def-type def-meta def-value)
_ (|case (&/T [is-type? (&a-meta/meta-get &a-meta/tags-tag def-meta)])
[true (&/$Some (&/$ListM tags*))]
(|do [tags (&/map% (fn [tag*]
(|case tag*
(&/$TextM tag)
(return tag)
_
(fail "[Compiler Error] Incorrect format for tags.")))
tags*)
_ (&a-module/declare-tags module-name tags def-value)]
(return &/unit-tag))
[false (&/$Some _)]
(fail "[Compiler Error] Can't define tags for non-type.")
[true (&/$Some _)]
(fail "[Compiler Error] Incorrect format for tags.")
[_ (&/$None)]
(return &/unit-tag))
:let [_ (println 'DEF (str module-name ";" ?name))]]
(return &/unit-tag))))))
(defn compile-ann [compile ?value-ex ?type-ex ?value-type]
(compile ?value-ex))
(defn compile-coerce [compile ?value-ex ?type-ex ?value-type]
(compile ?value-ex))
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