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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.analyser.parser
(:require (clojure [template :refer [do-template]])
clojure.core.match
clojure.core.match.array
(lux [base :as & :refer [|do return* return fail fail* |let |case]])))
;; [Parsers]
(defn parse-tag [ast]
(|case ast
[_ (&/$TagS "" name)]
(return name)
_
(fail (str "[Analyser Error] Not a tag: " (&/show-ast ast)))))
(defn parse-text [ast]
(|case ast
[_ (&/$TextS text)]
(return text)
_
(fail (str "[Analyser Error] Not text: " (&/show-ast ast)))))
(defn parse-gclass-decl [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS class-name)] (&/$Cons [_ (&/$TupleS args)] (&/$Nil))))]
(|do [=args (&/map% parse-text args)]
(return (&/T [class-name =args])))
_
(fail (str "[Analyser Error] Not generic class declaration: " (&/show-ast ast)))))
(defn parse-gclass [ast]
(|case ast
[_ (&/$TextS "*")]
(return (&/V &/$GenericWildcard &/unit-tag))
[_ (&/$TextS var-name)]
(return (&/V &/$GenericTypeVar var-name))
[_ (&/$FormS (&/$Cons [_ (&/$TextS class-name)] (&/$Cons [_ (&/$TupleS params)] (&/$Nil))))]
(|do [=params (&/map% parse-gclass params)]
(return (&/V &/$GenericClass (&/T [class-name =params]))))
[_ (&/$FormS (&/$Cons [_ (&/$TextS "Array")] (&/$Cons param (&/$Nil))))]
(|do [=param (parse-gclass param)]
(return (&/V &/$GenericArray =param)))
_
(fail (str "[Analyser Error] Not generic class: " (&/show-ast ast)))))
(defn parse-gclass-super [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS class-name)] (&/$Cons [_ (&/$TupleS params)] (&/$Nil))))]
(|do [=params (&/map% parse-gclass params)]
(return (&/T [class-name =params])))
_
(fail (str "[Analyser Error] Not generic super-class: " (&/show-ast ast)))))
(defn parse-ctor-arg [ast]
(|case ast
[_ (&/$TupleS (&/$Cons ?class (&/$Cons ?term (&/$Nil))))]
(|do [=class (parse-gclass ?class)]
(return (&/T [=class ?term])))
_
(fail (str "[Analyser Error] Not constructor argument: " (&/show-ast ast)))))
(defn parse-handler [catch+&finally+ token]
(|let [[catch+ finally+] catch+&finally+]
(|case token
[meta (&/$FormS (&/$Cons [_ (&/$SymbolS _ "_jvm_catch")]
(&/$Cons [_ (&/$TextS ?ex-class)]
(&/$Cons [_ (&/$SymbolS "" ?ex-arg)]
(&/$Cons ?catch-body
(&/$Nil))))))]
(return (&/T [(&/|++ catch+ (&/|list (&/T [?ex-class ?ex-arg ?catch-body]))) finally+]))
[meta (&/$FormS (&/$Cons [_ (&/$SymbolS _ "_jvm_finally")]
(&/$Cons ?finally-body
(&/$Nil))))]
(return (&/T [catch+ (&/V &/$Some ?finally-body)]))
_
(fail (str "[Analyser Error] Wrong syntax for exception handler: " (&/show-ast token))))))
(let [failure (fail (str "[Analyser Error] Invalid annotation parameter."))]
(defn ^:private parse-ann-param [param]
(|case param
[[_ (&/$TextS param-name)] param-value]
(|case param-value
[_ (&/$BoolS param-value*)] (return (&/T [param-name (boolean param-value*)]))
[_ (&/$IntS param-value*)] (return (&/T [param-name (int param-value*)]))
[_ (&/$RealS param-value*)] (return (&/T [param-name (float param-value*)]))
[_ (&/$CharS param-value*)] (return (&/T [param-name (char param-value*)]))
[_ (&/$TextS param-value*)] (return (&/T [param-name param-value*]))
_
failure)
_
failure)))
(defn parse-ann [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS ann-name)] (&/$Cons [_ (&/$RecordS ann-params)] (&/$Nil))))]
(|do [=ann-params (&/map% parse-ann-param ann-params)]
(return {:name ann-name
:params ann-params}))
_
(fail (str "[Analyser Error] Invalid annotation: " (&/show-ast ast)))))
(defn ^:private parse-arg-decl [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$SymbolS ["" arg-name])]
(&/$Cons gclass
(&/$Nil))))]
(|do [=gclass (parse-gclass gclass)]
(return (&/T [arg-name =gclass])))
_
(fail (str "[Analyser Error] Invalid argument declaration: " (&/show-ast ast)))))
(defn parse-method-decl [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS method-name)]
(&/$Cons [_ (&/$TupleS anns)]
(&/$Cons [_ (&/$TupleS gvars)]
(&/$Cons [_ (&/$TupleS exceptions)]
(&/$Cons [_ (&/$TupleS inputs)]
(&/$Cons output (&/$Nil))))))))]
(|do [=anns (&/map% parse-ann anns)
=gvars (&/map% parse-text gvars)
=exceptions (&/map% parse-gclass exceptions)
=inputs (&/map% parse-gclass inputs)
=output (parse-gclass output)]
(return (&/T [method-name =anns =gvars =exceptions =inputs =output])))
_
(fail (str "[Analyser Error] Invalid method declaration: " (&/show-ast ast)))))
(defn ^:private parse-method-init-def [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS "init")]
(&/$Cons [_ (&/$TupleS anns)]
(&/$Cons [_ (&/$TupleS gvars)]
(&/$Cons [_ (&/$TupleS exceptions)]
(&/$Cons [_ (&/$TupleS inputs)]
(&/$Cons [_ (&/$TupleS ?ctor-args)]
(&/$Cons body (&/$Nil)))))))))]
(|do [=anns (&/map% parse-ann anns)
=gvars (&/map% parse-text gvars)
=exceptions (&/map% parse-gclass exceptions)
=inputs (&/map% parse-arg-decl inputs)
=ctor-args (&/map% parse-ctor-arg ?ctor-args)]
(return (&/V &/$ConstructorMethodSyntax (&/T [=anns =gvars =exceptions =inputs =ctor-args body]))))
_
(fail "")))
(defn ^:private parse-method-virtual-def [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS "virtual")]
(&/$Cons [_ (&/$TextS ?name)]
(&/$Cons [_ (&/$TupleS anns)]
(&/$Cons [_ (&/$TupleS gvars)]
(&/$Cons [_ (&/$TupleS exceptions)]
(&/$Cons [_ (&/$TupleS inputs)]
(&/$Cons output
(&/$Cons body (&/$Nil))))))))))]
(|do [=anns (&/map% parse-ann anns)
=gvars (&/map% parse-text gvars)
=exceptions (&/map% parse-gclass exceptions)
=inputs (&/map% parse-arg-decl inputs)
=output (parse-gclass output)]
(return (&/V &/$VirtualMethodSyntax (&/T [?name =anns =gvars =exceptions =inputs =output body]))))
_
(fail "")))
(defn ^:private parse-method-override-def [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS "override")]
(&/$Cons ?class-decl
(&/$Cons ?name
(&/$Cons [_ (&/$TupleS anns)]
(&/$Cons [_ (&/$TupleS gvars)]
(&/$Cons [_ (&/$TupleS exceptions)]
(&/$Cons [_ (&/$TupleS inputs)]
(&/$Cons output
(&/$Cons body (&/$Nil)))))))))))]
(|do [=name (parse-text ?name)
=class-decl (parse-gclass-decl ?class-decl)
=anns (&/map% parse-ann anns)
=gvars (&/map% parse-text gvars)
=exceptions (&/map% parse-gclass exceptions)
=inputs (&/map% parse-arg-decl inputs)
=output (parse-gclass output)]
(return (&/V &/$OverridenMethodSyntax (&/T [=class-decl =name =anns =gvars =exceptions =inputs =output body]))))
_
(fail "")))
(defn parse-method-def [ast]
(&/try-all% (&/|list #((parse-method-init-def ast) %)
#((parse-method-virtual-def ast) %)
#((parse-method-override-def ast) %)
(fn [state]
(fail* (str "[Analyser Error] Invalid method definition: " (&/show-ast ast)))))))
(defn parse-field [ast]
(|case ast
[_ (&/$FormS (&/$Cons [_ (&/$TextS ?name)]
(&/$Cons [_ (&/$TupleS ?anns)]
(&/$Cons ?type
(&/$Nil)))))]
(|do [=anns (&/map% parse-ann ?anns)
=type (parse-gclass ?type)]
(return (&/T [?name =anns =type])))
_
(fail (str "[Analyser Error] Invalid field declaration: " (&/show-ast ast)))))
|
