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|
(.module:
[lux #- open]
(lux (control [monad #+ do])
(data ["e" error]
[text])
(concurrency [promise]
[task #+ Task])
(type object)
[io #+ IO Process io]
[host]))
(interface: #export Console
(read-char [] (Task Text))
(read-line [] (Task Text))
(write [Text] (Task Unit))
(close [] (Task Unit)))
(for {"JVM"
(as-is (host.import java/lang/AutoCloseable
(close [] #io #try void))
(host.import java/io/InputStream)
(host.import java/io/Reader)
(host.import java/io/InputStreamReader
(new [InputStream]))
(host.import java/io/BufferedReader
(new [Reader])
(read [] #io #try int)
(readLine [] #io #try String))
(host.import java/io/PrintStream
(print [String] #io #try void))
(host.import java/lang/System
(#static in java/io/InputStream)
(#static out java/io/PrintStream))
(class: JVM-Console Console
{#input BufferedReader
#output PrintStream}
(def: read-char
(|>> get@Console
(get@ #input)
(BufferedReader::read [])
(:: io.Functor<Process> map (|>> int-to-nat text.from-code))
promise.future))
(def: read-line
(|>> get@Console
(get@ #input)
(BufferedReader::readLine [])
promise.future))
(def: (write message)
(|>> get@Console
(get@ #output)
(PrintStream::print [message])
promise.future))
(def: (close self)
(promise.future
(do io.Monad<Process>
[_ (AutoCloseable::close [] (|> self get@Console (get@ #input)))]
(AutoCloseable::close [] (|> self get@Console (get@ #output)))))))
(def: #export open
(Process Console)
(io (#e.Success (new@JVM-Console {#input (|> System::in InputStreamReader::new BufferedReader::new)
#output System::out})))))
})
|
