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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/.
(;import lux
(lux (control (monoid #as m)
(functor #as F)
(monad #as M #refer (#only do seq%)))
(data (list #refer #all #open ("" List/Functor List/Fold))
(number/int #refer #all #open ("i:" Int/Ord))
maybe
tuple)
(meta lux
ast
syntax)))
(open List/Monad "list:")
## [Utils]
## Parsers
(def method-decl^
(Parser (, (List Text) Text (List Text) Text))
(form^ (do Parser/Monad
[modifiers (*^ local-tag^)
name local-symbol^
inputs (tuple^ (*^ local-symbol^))
output local-symbol^]
(wrap [modifiers name inputs output]))))
(def field-decl^
(Parser (, (List Text) Text Text))
(form^ (do Parser/Monad
[modifiers (*^ local-tag^)
name local-symbol^
class local-symbol^]
(wrap [modifiers name class]))))
(def arg-decl^
(Parser (, Text Text))
(form^ (do Parser/Monad
[arg-name local-symbol^
arg-class local-symbol^]
(wrap [arg-name arg-class]))))
(def method-def^
(Parser (, (List Text) Text (List (, Text Text)) Text AST))
(form^ (do Parser/Monad
[modifiers (*^ local-tag^)
name local-symbol^
inputs (tuple^ (*^ arg-decl^))
output local-symbol^
body id^]
(wrap [modifiers name inputs output body]))))
(def opt-arg^
(Parser (, Bool Text))
(&^ (tag?^ ["" "?"])
local-symbol^))
## [Syntax]
(defsyntax #export (definterface [name local-symbol^] [supers (tuple^ (*^ local-symbol^))] [members (*^ method-decl^)])
(let [members' (map (: (-> (, (List Text) Text (List Text) Text) AST)
(lambda [member]
(let [[modifiers name inputs output] member]
(` ((~ (text$ name)) [(~@ (map text$ inputs))] (~ (text$ output)) [(~@ (map text$ modifiers))])))))
members)]
(emit (@list (` (;_jvm_interface (~ (text$ name)) [(~@ (map text$ supers))]
(~@ members')))))))
(defsyntax #export (defclass [name local-symbol^] [super local-symbol^] [interfaces (tuple^ (*^ local-symbol^))]
[fields (*^ field-decl^)]
[methods (*^ method-def^)])
(do Lux/Monad
[current-module get-module-name
#let [fields' (map (: (-> (, (List Text) Text Text) AST)
(lambda [field]
(let [[modifiers name class] field]
(` ((~ (text$ name))
(~ (text$ class))
[(~@ (map text$ modifiers))])))))
fields)
methods' (map (: (-> (, (List Text) Text (List (, Text Text)) Text AST) AST)
(lambda [methods]
(let [[modifiers name inputs output body] methods]
(` ((~ (text$ name))
[(~@ (map (: (-> (, Text Text) AST)
(lambda [in]
(let [[left right] in]
(form$ (@list (symbol$ ["" left])
(text$ right))))))
inputs))]
(~ (text$ output))
[(~@ (map text$ modifiers))]
(~ body))))))
methods)]]
(emit (@list (` (;_jvm_class (~ (text$ name)) (~ (text$ super))
[(~@ (map text$ interfaces))]
[(~@ fields')]
[(~@ methods')]))))))
(defsyntax #export (program [args symbol^] body)
(emit (@list (` (;_jvm_program (~ (symbol$ args))
(~ body))))))
(defsyntax #export (??? expr)
(do Lux/Monad
[g!val (gensym "")]
(emit (@list (` (let [(~ g!val) (~ expr)]
(if (;_jvm_null? (~ g!val))
#;None
(#;Some (~ g!val)))))))))
(defsyntax #export (try expr)
(emit (@list (` (;_jvm_try (#;Right (~ expr))
(~ (' (_jvm_catch "java.lang.Exception" e
(#;Left (_jvm_invokevirtual "java.lang.Throwable" "getMessage" [] e []))))))))))
(defsyntax #export (Array [dimensions (?^ int^)] type)
(let [dimensions (? 1 dimensions)]
(if (i:> dimensions 0)
(emit (@list (foldL (lambda [inner _] (` (#;DataT "Array" (@list (~ inner)))))
type
(repeat dimensions []))))
(fail "Array must have positive dimension."))))
(defsyntax #export (instance? [class local-symbol^] obj)
(emit (@list (` (;_jvm_instanceof (~ (text$ class)) (~ obj))))))
(defsyntax #export (locking lock body)
(do Lux/Monad
[g!lock (gensym "")
g!body (gensym "")
g!_ (gensym "")]
(emit (@list (` (let [(~ g!lock) (~ lock)
(~ g!_) (;_jvm_monitorenter (~ g!lock))
(~ g!body) (~ body)
(~ g!_) (;_jvm_monitorexit (~ g!lock))]
(~ g!body)))))
))
(defsyntax #export (null? obj)
(emit (@list (` (;_jvm_null? (~ obj))))))
(def (prepare-args args)
(-> (List (, Bool Text)) (Lux (, (List AST) (List AST) (List AST) (List Text))))
(do Lux/Monad
[vars (seq% Lux/Monad (repeat (size args) (gensym "")))
#let [pairings (map (: (-> (, (, Bool Text) AST) (, AST (List AST)))
(lambda [[[opt? arg-class] var]]
(if opt?
[(` (Maybe (^ (~ (symbol$ ["" arg-class])))))
(@list var (` (: (^ (~ (symbol$ ["" arg-class])))
(case (~ var)
(#;Some (~ var)) (~ var)
#;None ;_jvm_null))))]
[(` (^ (~ (symbol$ ["" arg-class]))))
(@list)])))
(zip2 args vars))
var-types (map first pairings)
var-rebinds (map second pairings)
arg-classes (map second args)]]
(wrap [vars var-types (list:join var-rebinds) arg-classes])))
(defsyntax #export (new$ [class local-symbol^] [args (tuple^ (*^ opt-arg^))])
(do Lux/Monad
[[vars var-types var-rebinds arg-classes] (prepare-args args)]
(case vars
(\ (@list))
(do Lux/Monad
[g!_ (gensym "")]
(wrap (@list (` (: (-> (,) (^ (~ (symbol$ ["" class]))))
(lambda [(~ g!_)]
(;_jvm_new (~ (text$ class)) [] [])))))))
_
(wrap (@list (` (: (-> (, (~@ var-types)) (^ (~ (symbol$ ["" class]))))
(lambda [[(~@ vars)]]
(let [(~@ var-rebinds)]
(;_jvm_new (~ (text$ class)) [(~@ (map text$ arg-classes))] [(~@ vars)])))))))
)))
(do-template [<name> <op>]
[(defsyntax #export (<name> [class local-symbol^] [method local-symbol^] [args (tuple^ (*^ opt-arg^))]
[ex? (tag?^ ["" "!"])] [opt? (tag?^ ["" "?"])] [return local-symbol^])
(do Lux/Monad
[[vars var-types var-rebinds arg-classes] (prepare-args args)
g!self (gensym "self")
g!temp (gensym "temp")
#let [return-type (` (^ (~ (symbol$ ["" return]))))
body (` (<op> (~ (text$ class)) (~ (text$ method)) [(~@ (map text$ arg-classes))] (~ g!self) [(~@ vars)]))
[body return-type] (if opt?
[(` (let [(~ g!temp) (~ body)]
(if (;_jvm_null? (~ g!temp))
#;None
(#;Some (~ g!temp)))))
(` (Maybe (~ return-type)))]
[body return-type])
[body return-type] (if ex?
[(` (try (~ body)))
(` (Either Text (~ return-type)))]
[body return-type])]]
(wrap (@list (` (: (-> (, (~@ var-types)) (^ (~ (symbol$ ["" class]))) (~ return-type))
(lambda [[(~@ vars)] (~ g!self)]
(let [(~@ var-rebinds)]
(~ body)))))))
))]
[invoke-virtual$ ;_jvm_invokevirtual]
[invoke-interface$ ;_jvm_invokeinterface]
)
(defsyntax #export (invoke-static$ [class local-symbol^] [method local-symbol^] [args (tuple^ (*^ opt-arg^))]
[ex? (tag?^ ["" "!"])] [opt? (tag?^ ["" "?"])] [return local-symbol^])
(do Lux/Monad
[[vars var-types var-rebinds arg-classes] (prepare-args args)
g!temp (gensym "temp")
#let [return-type (` (^ (~ (symbol$ ["" return]))))
body (` (;_jvm_invokestatic (~ (text$ class)) (~ (text$ method)) [(~@ (map text$ arg-classes))] [(~@ vars)]))
[body return-type] (if opt?
[(` (let [(~ g!temp) (~ body)]
(if (;_jvm_null? (~ g!temp))
#;None
(#;Some (~ g!temp)))))
(` (Maybe (~ return-type)))]
[body return-type])
[body return-type] (if ex?
[(` (try (~ body)))
(` (Either Text (~ return-type)))]
[body return-type])]]
(wrap (@list (` (: (-> (, (~@ var-types)) (~ return-type))
(lambda [[(~@ vars)]]
(let [(~@ var-rebinds)]
(~ body)))))))
))
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