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(.module:
[lux #- not or and]
(lux
(control
pipe)
(data [text]
text/format
(coll [list "list/" Functor<List> Fold<List>]))))
(type: #export Ruby Text)
(type: #export Expression Ruby)
(type: #export Statement Ruby)
(def: #export nil
Expression
"nil")
(def: #export bool
(-> Bit Expression)
(|>> (case> true "true"
false "false")))
(def: #export int
(-> Int Expression)
%i)
(def: #export float
(-> Frac Expression)
%f)
(def: #export (string value)
(-> Text Expression)
(%t value))
(def: #export splat
(-> Expression Expression)
(|>> (format "*")))
(def: #export (array-range from to array)
(-> Expression Expression Expression Expression)
(format "(" array "[" from ".." to "])"))
(def: #export (array elements)
(-> (List Expression) Expression)
(format "([" (text.join-with "," elements) "])"))
(def: #export (dictionary kvs)
(-> (List [Expression Expression]) Expression)
(format "({"
(|> kvs
(list/map (.function (_ [k v])
(format k " => " v)))
(text.join-with ", "))
"})"))
(def: #export (apply func args)
(-> Expression (List Expression) Expression)
(format "(" func "(" (text.join-with "," args) ")" ")"))
(def: #export (send method args object)
(-> Text (List Expression) Expression Expression)
(apply (format object "." method) args))
(def: #export call
(-> (List Expression) Expression Expression)
(send "call"))
(def: #export (nth idx array)
(-> Expression Expression Expression)
(format "(" array "[" idx "])"))
(def: #export (set-nth! idx value array)
(-> Expression Expression Expression Statement)
(format array "[" idx "] = " value ";"))
(def: #export (field name object)
(-> Text Expression Expression)
(format "(" object "." name ")"))
(def: #export (length array)
(-> Expression Expression)
(format "(" array ".length)"))
(def: #export (set! vars value)
(-> (List Text) Expression Statement)
(format (text.join-with ", " vars) " = " value ";"))
(def: #export (global var)
(-> Text Expression)
(format "$" var))
(def: #export (global! var value)
(-> Text Expression Statement)
(set! (list (global var)) value))
(def: #export (? test then! else!)
(-> Expression Expression Expression Expression)
(format "(" test " ? " then! " : " else! ")"))
(def: #export (if! test then! else!)
(-> Expression Statement Statement Statement)
(format "if " test
"\n" then!
"\n" "else"
"\n" else!
"\n" "end;"))
(def: #export (when! test then!)
(-> Expression Statement Statement)
(format "if " test
"\n" then!
"\n" "end;"))
(def: #export (cond! clauses else!)
(-> (List [Expression Statement]) Statement Statement)
(list/fold (.function (_ [test then!] next!)
(if! test then! next!))
else!
(list.reverse clauses)))
(def: #export (block! statements)
(-> (List Statement) Statement)
(text.join-with " " statements))
(def: #export (statement expression)
(-> Expression Statement)
(format expression ";"))
(def: #export (while! test body)
(-> Expression Statement Statement)
(format "while " test
"\n" body
"\n" "end;"))
(def: #export (for-in! var array body)
(-> Text Expression Statement Statement)
(format "for " var " in " array "do" "\n"
body "\n"
"end;" "\n"))
(def: #export (begin! body rescues)
(-> Statement (List [(List Text) Text Statement]) Statement)
(format "begin"
"\n" body "\n"
(|> rescues
(list/map (function (_ [ex-classes ex-value ex-handler])
(format "rescue " (text.join-with ", " ex-classes)
(case ex-value
"" ""
_ (format " => " ex-value))
"\n"
ex-handler)))
(text.join-with "\n"))
"\n" "end;"))
(def: #export (raise message)
(-> Expression Expression)
(format "raise " message ";"))
(def: #export (return! value)
(-> Expression Statement)
(format "return " value ";"))
(def: #export (function! name args body)
(-> Text (List Text) Statement Statement)
(format "def " name "(" (text.join-with "," args) ")\n"
body
"\n" "end;"))
(def: #export (lambda name args body)
(-> (Maybe Text) (List Text) Statement Expression)
(let [proc (format "lambda {" (format "|" (text.join-with ", " args) "|") " " body "}")]
(case name
#.None
(format "(" proc ")")
(#.Some name)
(format "(" name " = " proc ")"))))
(do-template [<name> <op>]
[(def: #export (<name> param subject)
(-> Expression Expression Expression)
(format "(" subject " " <op> " " param ")"))]
[= "=="]
[< "<"]
[<= "<="]
[> ">"]
[>= ">="]
[+ "+"]
[- "-"]
[* "*"]
[/ "/"]
[% "%"]
[pow "**"]
)
(do-template [<name> <op>]
[(def: #export (<name> param subject)
(-> Expression Expression Expression)
(format "(" param " " <op> " " subject ")"))]
[or "||"]
[and "&&"]
[bit-or "|"]
[bit-and "&"]
[bit-xor "^"]
)
(do-template [<name> <op>]
[(def: #export (<name> param subject)
(-> Expression Expression Expression)
(format "(" subject " " <op> " " param ")"))]
[bit-shl "<<"]
[bit-shr ">>"]
)
(def: #export (not subject)
(-> Expression Expression)
(format "(!" subject ")"))
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