blob: 99e15722d80e7267efad3e42d17fcf27ddffcd74 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
## 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 (data io
(list #refer #all #open ("" List/Fold)))
(meta ast
syntax
lux)
control/monad)
(.. jvm))
## [Functions]
(do-template [<name> <method> <type> <class>]
[(def #export (<name> x)
(-> <type> (IO (,)))
(@io (_jvm_invokevirtual "java.io.PrintStream" <method> [<class>]
(_jvm_getstatic "java.lang.System" "out") [x])))]
[write-char "print" Char "char"]
[write "print" Text "java.lang.String"]
[write-line "println" Text "java.lang.String"]
)
(do-template [<name> <type> <op>]
[(def #export <name>
(IO (Maybe <type>))
(let [in (_jvm_getstatic "java.lang.System" "in")
reader (_jvm_new "java.io.InputStreamReader" ["java.io.InputStream"] [in])
buff-reader (_jvm_new "java.io.BufferedReader" ["java.io.Reader"] [reader])]
(@io (let [output (: (Either Text <type>) (try <op>))
_close (: (Either Text (,)) (try (_jvm_invokeinterface "java.io.Closeable" "close" [] buff-reader [])))]
(case [output _close]
(\or [(#;Left _) _] [_ (#;Left _)]) #;None
[(#;Right input) (#;Right _)] (#;Some input))))))]
[read-char Char (_jvm_i2c (_jvm_invokevirtual "java.io.BufferedReader" "read" [] buff-reader []))]
[read-line Text (_jvm_invokevirtual "java.io.BufferedReader" "readLine" [] buff-reader [])]
)
## [Syntax]
(def simple-bindings^
(Parser (List (, Text AST)))
(tuple^ (*^ (&^ local-symbol^ id^))))
(defsyntax #export (with-open [bindings simple-bindings^] body)
(do Lux/Monad
[g!output (gensym "output")
#let [code (foldL (: (-> AST (, Text AST) AST)
(lambda [body [res-name res-value]]
(let [g!res-name (symbol$ ["" res-name])]
(` (let [(~ g!res-name) (~ res-value)
(~ g!output) (~ body)]
(exec (;_jvm_invokeinterface "java.io.Closeable" "close" [] (~ g!res-name) [])
(~ g!output)))))))
body
(reverse bindings))]]
(wrap (@list code))))
|
