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;; Copyright (c) Eduardo Julian. 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 lux.analyser.module
(:refer-clojure :exclude [alias])
(:require [clojure.string :as string]
clojure.core.match
clojure.core.match.array
(lux [base :as & :refer [|let |do return return* fail fail* |case]]
[type :as &type]
[host :as &host])
[lux.analyser.base :as &&]))
;; [Utils]
(def ^:private $DEFS 0)
(def ^:private $ALIASES 1)
(def ^:private $IMPORTS 2)
(def ^:private +init+
(&/R ;; "lux;defs"
(&/|table)
;; "lux;module-aliases"
(&/|table)
;; "lux;imports"
(&/|list)
))
;; [Exports]
(defn add-import [module]
"(-> Text (Lux (,)))"
(|do [current-module &/get-module-name]
(fn [state]
(return* (&/update$ &/$MODULES
(fn [ms]
(&/|update current-module
(fn [m] (&/update$ $IMPORTS (partial &/|cons module) m))
ms))
state)
nil))))
(defn define [module name def-data type]
(fn [state]
(|case (&/get$ &/$ENVS state)
(&/$Cons ?env (&/$Nil))
(return* (->> state
(&/update$ &/$MODULES
(fn [ms]
(&/|update module
(fn [m]
(&/update$ $DEFS
#(&/|put name (&/T false def-data) %)
m))
ms))))
nil)
_
(fail* (str "[Analyser Error] Can't create a new global definition outside of a global environment: " module ";" name)))))
(defn def-type [module name]
"(-> Text Text (Lux Type))"
(fn [state]
(if-let [$module (->> state (&/get$ &/$MODULES) (&/|get module))]
(if-let [$def (->> $module (&/get$ $DEFS) (&/|get name))]
(|case $def
[_ ("lux;TypeD" _)]
(return* state &type/Type)
[_ ("lux;MacroD" _)]
(return* state &type/Macro)
[_ ("lux;ValueD" _type _)]
(return* state _type)
[_ ("lux;AliasD" ?r-module ?r-name)]
(&/run-state (def-type ?r-module ?r-name)
state))
(fail* (str "[Analyser Error] Unknown definition: " (str module ";" name))))
(fail* (str "[Analyser Error] Unknown module: " module)))))
(defn def-alias [a-module a-name r-module r-name type]
;; (prn 'def-alias [a-module a-name] [r-module r-name] (&type/show-type type))
(fn [state]
(|case (&/get$ &/$ENVS state)
(&/$Cons ?env (&/$Nil))
(return* (->> state
(&/update$ &/$MODULES
(fn [ms]
(&/|update a-module
(fn [m]
(&/update$ $DEFS
#(&/|put a-name (&/T false (&/V "lux;AliasD" (&/T r-module r-name))) %)
m))
ms))))
nil)
_
(fail* "[Analyser Error] Can't alias a global definition outside of a global environment."))))
(defn exists? [name]
"(-> Text (Lux Bool))"
(fn [state]
(return* state
(->> state (&/get$ &/$MODULES) (&/|contains? name)))))
(defn alias [module alias reference]
(fn [state]
(return* (->> state
(&/update$ &/$MODULES
(fn [ms]
(&/|update module
#(&/update$ $ALIASES
(fn [aliases]
(&/|put alias reference aliases))
%)
ms))))
nil)))
(defn dealias [name]
(|do [current-module &/get-module-name]
(fn [state]
(if-let [real-name (->> state (&/get$ &/$MODULES) (&/|get current-module) (&/get$ $ALIASES) (&/|get name))]
(return* state real-name)
(fail* (str "Unknown alias: " name))))))
(defn find-def [module name]
(|do [current-module &/get-module-name]
(fn [state]
;; (prn 'find-def/_0 module name 'current-module current-module)
(if-let [$module (->> state (&/get$ &/$MODULES) (&/|get module))]
(do ;; (prn 'find-def/_0.1 module (&/->seq (&/|keys $module)))
(if-let [$def (->> $module (&/get$ $DEFS) (&/|get name))]
(|let [[exported? $$def] $def]
(do ;; (prn 'find-def/_1 module name 'exported? exported? (.equals ^Object current-module module))
(if (or exported? (.equals ^Object current-module module))
(|case $$def
("lux;AliasD" ?r-module ?r-name)
(do ;; (prn 'find-def/_2 [module name] [?r-module ?r-name])
((find-def ?r-module ?r-name)
state))
_
(return* state (&/T (&/T module name) $$def)))
(fail* (str "[Analyser Error] Can't use unexported definition: " (str module &/+name-separator+ name))))))
(fail* (str "[Analyser Error] Definition does not exist: " (str module &/+name-separator+ name)))))
(fail* (str "[Analyser Error] Module doesn't exist: " module))))))
(defn defined? [module name]
(&/try-all% (&/|list (|do [_ (find-def module name)]
(return true))
(return false))))
(defn declare-macro [module name]
(fn [state]
(if-let [$module (->> state (&/get$ &/$MODULES) (&/|get module) (&/get$ $DEFS))]
(if-let [$def (&/|get name $module)]
(|case $def
[exported? ("lux;ValueD" ?type _)]
((|do [_ (&type/check &type/Macro ?type)
^ClassLoader loader &/loader
:let [macro (-> (.loadClass loader (str (&host/->module-class module) "." (&/normalize-name name)))
(.getField "_datum")
(.get nil))]]
(fn [state*]
(return* (&/update$ &/$MODULES
(fn [$modules]
(&/|update module
(fn [m]
(&/update$ $DEFS
#(&/|put name (&/T exported? (&/V "lux;MacroD" macro)) %)
m))
$modules))
state*)
nil)))
state)
[_ ("lux;MacroD" _)]
(fail* (str "[Analyser Error] Can't re-declare a macro: " (str module &/+name-separator+ name)))
[_ _]
(fail* (str "[Analyser Error] Definition does not have macro type: " (str module &/+name-separator+ name))))
(fail* (str "[Analyser Error] Definition does not exist: " (str module &/+name-separator+ name))))
(fail* (str "[Analyser Error] Module does not exist: " module)))))
(defn export [module name]
(fn [state]
(|case (&/get$ &/$ENVS state)
(&/$Cons ?env (&/$Nil))
(if-let [$def (->> state (&/get$ &/$MODULES) (&/|get module) (&/get$ $DEFS) (&/|get name))]
(|case $def
[true _]
(fail* (str "[Analyser Error] Definition has already been exported: " module ";" name))
[false ?data]
(return* (->> state
(&/update$ &/$MODULES (fn [ms]
(&/|update module (fn [m]
(&/update$ $DEFS
#(&/|put name (&/T true ?data) %)
m))
ms))))
nil))
(fail* (str "[Analyser Error] Can't export an inexistent definition: " (str module &/+name-separator+ name))))
_
(fail* "[Analyser Error] Can't export a global definition outside of a global environment."))))
(def defs
(|do [module &/get-module-name]
(fn [state]
(return* state
(&/|map (fn [kv]
(|let [[k [?exported? ?def]] kv]
(do ;; (prn 'defs k ?exported?)
(|case ?def
("lux;AliasD" ?r-module ?r-name)
(&/T ?exported? k (str "A" ?r-module ";" ?r-name))
("lux;MacroD" _)
(&/T ?exported? k "M")
("lux;TypeD" _)
(&/T ?exported? k "T")
_
(&/T ?exported? k "V")))))
(->> state (&/get$ &/$MODULES) (&/|get module) (&/get$ $DEFS)))))))
(def imports
(|do [module &/get-module-name]
(fn [state]
(return* state (->> state (&/get$ &/$MODULES) (&/|get module) (&/get$ $IMPORTS))))))
(defn create-module [name]
(fn [state]
(return* (&/update$ &/$MODULES #(&/|put name +init+ %) state) nil)))
(defn enter-module [name]
(fn [state]
(return* (->> state
(&/update$ &/$MODULES #(&/|put name +init+ %))
(&/set$ &/$ENVS (&/|list (&/env name))))
nil)))
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