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(.module:
lux
(lux (control ["ex" exception #+ exception:]
pipe
[monad #+ do])
(data [bit]
[maybe]
["e" error #+ Error]
[text "text/" Eq<Text>]
text/format
(coll [array]))
[macro]
[io #+ IO Process io]
[host #+ class: interface: object]
(world [file #+ File]))
(luxc [lang]
(lang [".L" variable #+ Register]
(host [ruby #+ Ruby Expression Statement]))
[".C" io]))
(host.import java/lang/Object)
(host.import java/lang/String
(getBytes [String] #try (Array byte)))
(host.import java/lang/CharSequence)
(host.import java/lang/Appendable
(append [CharSequence] Appendable))
(host.import java/lang/StringBuilder
(new [])
(toString [] String))
(host.import org/jruby/embed/ScriptingContainer
(new [])
(runScriptlet [String] #? Object))
(type: #export Anchor [Text Register])
(type: #export Host
{#context [Text Nat]
#anchor (Maybe Anchor)
#interpreter (-> Text (Error Top))
#module-buffer (Maybe StringBuilder)
#program-buffer StringBuilder})
(def: #export init
(IO Host)
(io {#context ["" +0]
#anchor #.None
#interpreter (let [interpreter (ScriptingContainer::new [])]
(function [code]
("lux try" (io (: Top (maybe.default [] (ScriptingContainer::runScriptlet [code] interpreter)))))))
#module-buffer #.None
#program-buffer (StringBuilder::new [])}))
(def: #export ruby-module-name Text "module.rb")
(def: #export init-module-buffer
(Meta Unit)
(function [compiler]
(#e.Success [(update@ #.host
(|>> (:! Host)
(set@ #module-buffer (#.Some (StringBuilder::new [])))
(:! Void))
compiler)
[]])))
(exception: #export No-Active-Module-Buffer)
(exception: #export Cannot-Execute)
(def: #export (with-sub-context expr)
(All [a] (-> (Meta a) (Meta [Text a])))
(function [compiler]
(let [old (:! Host (get@ #.host compiler))
[old-name old-sub] (get@ #context old)
new-name (format old-name "___" (%i (nat-to-int old-sub)))]
(case (expr (set@ #.host
(:! Void (set@ #context [new-name +0] old))
compiler))
(#e.Success [compiler' output])
(#e.Success [(update@ #.host
(|>> (:! Host)
(set@ #context [old-name (n/inc old-sub)])
(:! Void))
compiler')
[new-name output]])
(#e.Error error)
(#e.Error error)))))
(def: #export context
(Meta Text)
(function [compiler]
(#e.Success [compiler
(|> (get@ #.host compiler)
(:! Host)
(get@ #context)
(let> [name sub]
name))])))
(def: #export (with-anchor anchor expr)
(All [a] (-> Anchor (Meta a) (Meta a)))
(function [compiler]
(let [old (:! Host (get@ #.host compiler))]
(case (expr (set@ #.host
(:! Void (set@ #anchor (#.Some anchor) old))
compiler))
(#e.Success [compiler' output])
(#e.Success [(update@ #.host
(|>> (:! Host)
(set@ #anchor (get@ #anchor old))
(:! Void))
compiler')
output])
(#e.Error error)
(#e.Error error)))))
(exception: #export No-Anchor)
(def: #export anchor
(Meta Anchor)
(function [compiler]
(case (|> compiler (get@ #.host) (:! Host) (get@ #anchor))
(#.Some anchor)
(#e.Success [compiler anchor])
#.None
((lang.throw No-Anchor "") compiler))))
(def: #export module-buffer
(Meta StringBuilder)
(function [compiler]
(case (|> compiler (get@ #.host) (:! Host) (get@ #module-buffer))
#.None
((lang.fail (No-Active-Module-Buffer "")) compiler)
(#.Some module-buffer)
(#e.Success [compiler module-buffer]))))
(def: #export program-buffer
(Meta StringBuilder)
(function [compiler]
(#e.Success [compiler (|> compiler (get@ #.host) (:! Host) (get@ #program-buffer))])))
(def: (execute code)
(-> Expression (Meta Unit))
(function [compiler]
(let [interpreter (|> compiler (get@ #.host) (:! Host) (get@ #interpreter))]
(case (interpreter code)
(#e.Error error)
((lang.fail (Cannot-Execute error)) compiler)
(#e.Success _)
(#e.Success [compiler []])))))
(exception: #export Unknown-Member)
(def: #export variant-tag-field "_lux_tag")
(def: #export variant-flag-field "_lux_flag")
(def: #export variant-value-field "_lux_value")
(def: #export unit Text "\u0000")
(def: #export (definition-name [module name])
(-> Ident Text)
(lang.normalize-name (format module "$" name)))
(def: #export (save code)
(-> Ruby (Meta Unit))
(do macro.Monad<Meta>
[module-buffer module-buffer
#let [_ (Appendable::append [(:! CharSequence code)]
module-buffer)]]
(execute code)))
(def: #export (save-module! target)
(-> File (Meta (Process Unit)))
(do macro.Monad<Meta>
[module macro.current-module-name
module-buffer module-buffer
program-buffer program-buffer
#let [module-code (StringBuilder::toString [] module-buffer)
_ (Appendable::append [(:! CharSequence (format module-code "\n"))]
program-buffer)]]
(wrap (ioC.write target
(format (lang.normalize-name module) "/" ruby-module-name)
(|> module-code
(String::getBytes ["UTF-8"])
e.assume)))))
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