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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.
(;import lux
(lux (control (monoid #as m)
(functor #as F)
(monad #as M #refer (#only do)))
(data (list #as l #refer #all #open ("" List/Functor))
(text #as text)
(number (int #open ("i" Int/Eq))))
(meta lux
macro
syntax)))
## [Utils]
## Parsers
(def finally^
(Parser Syntax)
(form^ (do Parser/Monad
[_ (symbol?^ ["" "finally"])
expr id^]
(M;wrap expr))))
(def catch^
(Parser (, Text Ident Syntax))
(form^ (do Parser/Monad
[_ (symbol?^ ["" "catch"])
ex-class local-symbol^
ex symbol^
expr id^]
(M;wrap [ex-class ex expr]))))
(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^]
(M;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^]
(M;wrap [modifiers name class]))))
(def arg-decl^
(Parser (, Text Text))
(form^ (do Parser/Monad
[arg-name local-symbol^
arg-class local-symbol^]
(M;wrap [arg-name arg-class]))))
(def method-def^
(Parser (, (List Text) Text (List (, Text Text)) Text Syntax))
(form^ (do Parser/Monad
[modifiers (*^ local-tag^)
name local-symbol^
inputs (tuple^ (*^ arg-decl^))
output local-symbol^
body id^]
(M;wrap [modifiers name inputs output body]))))
(def method-call^
(Parser (, Text (List Text) (List Syntax)))
(form^ (do Parser/Monad
[method local-symbol^
arity-classes (tuple^ (*^ local-symbol^))
arity-args (tuple^ (*^ id^))
_ (: (Parser (,))
(if (i= (size arity-classes)
(size arity-args))
(M;wrap [])
(lambda [_] #;None)))]
(M;wrap [method arity-classes arity-args])
)))
## [Syntax]
(defsyntax #export (throw ex)
(emit (list (` (_jvm_throw (~ ex))))))
(defsyntax #export (try body [catches (*^ catch^)] [finally (?^ finally^)])
(emit (list (` (_jvm_try (~ body)
(~@ (:: List/Monoid (m;++ (map (: (-> (, Text Ident Syntax) Syntax)
(lambda [catch]
(let [[class ex body] catch]
(` (_jvm_catch (~ (text$ class)) (~ (symbol$ ex)) (~ body))))))
catches)
(case finally
#;None
(list)
(#;Some finally)
(list (` (_jvm_finally (~ finally)))))))))))))
(defsyntax #export (definterface [name local-symbol^] [supers (tuple^ (*^ local-symbol^))] [members (*^ method-decl^)])
(let [members' (map (: (-> (, (List Text) Text (List Text) Text) Syntax)
(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) Syntax)
(lambda [field]
(let [[modifiers name class] field]
(` ((~ (text$ name))
(~ (text$ class))
[(~@ (map text$ modifiers))])))))
fields)
methods' (map (: (-> (, (List Text) Text (List (, Text Text)) Text Syntax) Syntax)
(lambda [methods]
(let [[modifiers name inputs output body] methods]
(` ((~ (text$ name))
[(~@ (map (: (-> (, Text Text) Syntax)
(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 (new [class local-symbol^] [arg-classes (tuple^ (*^ local-symbol^))] [args (tuple^ (*^ id^))])
(emit (list (` (_jvm_new (~ (text$ class))
[(~@ (map text$ arg-classes))]
[(~@ args)])))))
(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 "")]
(emit (list (` (;let [(~ g!lock) (~ lock)
_ (_jvm_monitorenter (~ g!lock))
(~ g!body) (~ body)
_ (_jvm_monitorexit (~ g!lock))]
(~ g!body)))))
))
(defsyntax #export (null? obj)
(emit (list (` (_jvm_null? (~ obj))))))
(defsyntax #export (program [args symbol^] body)
(emit (list (` (_jvm_program (~ (symbol$ args))
(~ body))))))
(defsyntax #export (.? [field local-symbol^] obj)
(case obj
(#;Meta [_ (#;SymbolS obj-name)])
(do Lux/Monad
[obj-type (find-var-type obj-name)]
(case obj-type
(#;DataT class)
(emit (list (` (_jvm_getfield (~ (text$ class)) (~ (text$ field))))))
_
(fail "Can only get field from object.")))
_
(do Lux/Monad
[g!obj (gensym "")]
(emit (list (` (;let [(~ g!obj) (~ obj)]
(.? (~ (text$ field)) (~ g!obj)))))))))
(defsyntax #export (.= [field local-symbol^] value obj)
(case obj
(#;Meta [_ (#;SymbolS obj-name)])
(do Lux/Monad
[obj-type (find-var-type obj-name)]
(case obj-type
(#;DataT class)
(emit (list (` (_jvm_putfield (~ (text$ class)) (~ (text$ field)) (~ value)))))
_
(fail "Can only set field of object.")))
_
(do Lux/Monad
[g!obj (gensym "")]
(emit (list (` (;let [(~ g!obj) (~ obj)]
(.= (~ (text$ field)) (~ value) (~ g!obj)))))))))
(defsyntax #export (.! [call method-call^] obj)
(let [[m-name ?m-classes m-args] call]
(case obj
(#;Meta [_ (#;SymbolS obj-name)])
(do Lux/Monad
[obj-type (find-var-type obj-name)]
(case obj-type
(#;DataT class)
(emit (list (` (_jvm_invokevirtual (~ (text$ class)) (~ (text$ m-name)) [(~@ (map text$ ?m-classes))]
(~ obj) [(~@ m-args)]))))
_
(fail "Can only call method on object.")))
_
(do Lux/Monad
[g!obj (gensym "")]
(emit (list (` (;let [(~ g!obj) (~ obj)]
(.! ((~ (symbol$ ["" m-name]))
[(~@ (map (lambda [c] (symbol$ ["" c])) ?m-classes))]
[(~@ m-args)])
(~ g!obj))))))))))
(defsyntax #export (..? [field local-symbol^] [class local-symbol^])
(emit (list (` (_jvm_getstatic (~ (text$ class)) (~ (text$ field)))))))
(defsyntax #export (..= [field local-symbol^] value [class local-symbol^])
(emit (list (` (_jvm_putstatic (~ (text$ class)) (~ (text$ field)) (~ value))))))
(defsyntax #export (..! [call method-call^] [class local-symbol^])
(let [[m-name m-classes m-args] call]
(emit (list (` (_jvm_invokestatic (~ (text$ class)) (~ (text$ m-name))
[(~@ (map text$ m-classes))]
[(~@ m-args)]))))))
(defsyntax #export (->maybe expr)
(do Lux/Monad
[g!val (gensym "")]
(emit (list (` (;let [(~ g!val) (~ expr)]
(;if (null? (~ g!val))
#;None
(#;Some (~ g!val)))))))))
(defsyntax #export (try$ expr)
(emit (list (` (try (#;Right (~ expr))
(~ (' (catch java.lang.Exception e
(#;Left (.! (getMessage [] []) e))))))))))
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