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|
(.module:
[lux (#- Code int if cond function or and not let)
[control
[pipe (#+ case> cond> new>)]
[parser
["s" code]]]
[data
[number
["i" int]
["f" frac]]
["." text
["%" format (#+ format)]]
[collection
["." list ("#@." functor fold)]]]
[macro
["." template]
["." code]
[syntax (#+ syntax:)]]
[type
abstract]])
(def: input-separator ", ")
(def: statement-suffix ";")
(def: nest
(-> Text Text)
(|>> (format text.new-line)
(text.replace-all text.new-line (format text.new-line text.tab))))
(abstract: #export (Code brand)
{}
Text
(def: #export manual
(-> Text Code)
(|>> :abstraction))
(def: #export code
(-> (Code Any) Text)
(|>> :representation))
(template [<type> <super>]
[(with-expansions [<brand> (template.identifier [<type> "'"])]
(`` (abstract: #export (<brand> brand) {} Any))
(`` (type: #export (<type> brand)
(<super> (<brand> brand)))))]
[Expression Code]
[Computation Expression]
[Location Computation]
)
(template [<type> <super>]
[(with-expansions [<brand> (template.identifier [<type> "'"])]
(`` (abstract: #export <brand> {} Any))
(`` (type: #export <type> (<super> <brand>))))]
[Literal Computation]
[Var Location]
[Access Location]
[Statement Code]
)
(def: #export nil
Literal
(:abstraction "nil"))
(def: #export bool
(-> Bit Literal)
(|>> (case> #0 "false"
#1 "true")
:abstraction))
(def: #export (int value)
(-> Int Literal)
(:abstraction (.if (i.< +0 value)
(%.int value)
(%.nat (.nat value)))))
(def: #export float
(-> Frac Literal)
(|>> (cond> [(f.= f.positive-infinity)]
[(new> "(1.0/0.0)" [])]
[(f.= f.negative-infinity)]
[(new> "(-1.0/0.0)" [])]
[(f.= f.not-a-number)]
[(new> "(0.0/0.0)" [])]
## else
[%.frac])
:abstraction))
(def: sanitize
(-> Text Text)
(`` (|>> (~~ (template [<find> <replace>]
[(text.replace-all <find> <replace>)]
["\" "\\"]
[text.tab "\t"]
[text.vertical-tab "\v"]
[text.null "\0"]
[text.back-space "\b"]
[text.form-feed "\f"]
[text.new-line "\n"]
[text.carriage-return "\r"]
[text.double-quote (format "\" text.double-quote)]
))
)))
(def: #export string
(-> Text Literal)
(|>> ..sanitize (text.enclose' text.double-quote) :abstraction))
(def: #export array
(-> (List (Expression Any)) Literal)
(|>> (list@map ..code)
(text.join-with ..input-separator)
(text.enclose ["{" "}"])
:abstraction))
(def: #export table
(-> (List [Text (Expression Any)]) Literal)
(|>> (list@map (.function (_ [key value])
(format key " = " (:representation value))))
(text.join-with ..input-separator)
(text.enclose ["{" "}"])
:abstraction))
(def: #export (nth idx array)
(-> (Expression Any) (Expression Any) Access)
(:abstraction (format (:representation array) "[" (:representation idx) "]")))
(def: #export (the field table)
(-> Text (Expression Any) (Computation Any))
(:abstraction (format (:representation table) "." field)))
(def: #export length
(-> (Expression Any) (Computation Any))
(|>> :representation
(text.enclose ["#(" ")"])
:abstraction))
(def: #export (apply/* args func)
(-> (List (Expression Any)) (Expression Any) (Computation Any))
(|> args
(list@map ..code)
(text.join-with ..input-separator)
(text.enclose ["(" ")"])
(format (:representation func))
:abstraction))
(def: #export (do method table args)
(-> Text (Expression Any) (List (Expression Any)) (Computation Any))
(|> args
(list@map ..code)
(text.join-with ..input-separator)
(text.enclose ["(" ")"])
(format (:representation table) ":" method)
:abstraction))
(template [<op> <name>]
[(def: #export (<name> parameter subject)
(-> (Expression Any) (Expression Any) (Expression Any))
(:abstraction (format "("
(:representation subject)
" " <op> " "
(:representation parameter)
")")))]
["==" =]
["<" <]
["<=" <=]
[">" >]
[">=" >=]
["+" +]
["-" -]
["*" *]
["/" /]
["//" //]
["%" %]
[".." concat]
["or" or]
["and" and]
["|" bit-or]
["&" bit-and]
["~" bit-xor]
["<<" bit-shl]
[">>" bit-shr]
)
(def: #export (not subject)
(-> (Expression Any) (Expression Any))
(:abstraction (format "(not " (:representation subject) ")")))
(def: #export var
(-> Text Var)
(|>> :abstraction))
(def: #export statement
(-> (Expression Any) Statement)
(|>> :representation (text.suffix ..statement-suffix) :abstraction))
(def: #export (then pre! post!)
(-> Statement Statement Statement)
(:abstraction
(format (:representation pre!)
text.new-line
(:representation post!))))
(def: locations
(-> (List (Location Any)) Text)
(|>> (list@map ..code)
(text.join-with ..input-separator)))
(def: #export (local vars)
(-> (List Var) Statement)
(:abstraction (format "local " (..locations vars) ..statement-suffix)))
(def: #export (set vars value)
(-> (List (Location Any)) (Expression Any) Statement)
(:abstraction (format (..locations vars) " = " (:representation value) ..statement-suffix)))
(def: #export (let vars value)
(-> (List Var) (Expression Any) Statement)
($_ ..then
(local vars)
(set vars value)))
(def: #export (if test then! else!)
(-> (Expression Any) Statement Statement Statement)
(:abstraction (format "if " (:representation test)
text.new-line "then" (..nest (:representation then!))
text.new-line "else" (..nest (:representation else!))
text.new-line "end" ..statement-suffix)))
(def: #export (when test then!)
(-> (Expression Any) Statement Statement)
(:abstraction (format "if " (:representation test)
text.new-line "then" (..nest (:representation then!))
text.new-line "end" ..statement-suffix)))
(def: #export (while test body!)
(-> (Expression Any) Statement Statement)
(:abstraction
(format "while " (:representation test) " do"
(..nest (:representation body!))
text.new-line "end" ..statement-suffix)))
(def: #export (for-in vars source body!)
(-> (List Var) (Expression Any) Statement Statement)
(:abstraction
(format "for " (|> vars
(list@map ..code)
(text.join-with ..input-separator))
" in " (:representation source) " do"
(..nest (:representation body!))
text.new-line "end" ..statement-suffix)))
(def: #export (for-step var from to step body!)
(-> Var (Expression Any) (Expression Any) (Expression Any) Statement
Statement)
(:abstraction
(format "for " (:representation var)
" = " (:representation from)
..input-separator (:representation to)
..input-separator (:representation step) " do"
(..nest (:representation body!))
text.new-line "end" ..statement-suffix)))
(def: #export (return value)
(-> (Expression Any) Statement)
(:abstraction (format "return " (:representation value) ..statement-suffix)))
(def: #export (closure args body!)
(-> (List Var) Statement (Expression Any))
(|> (format "function " (|> args
..locations
(text.enclose ["(" ")"]))
(..nest (:representation body!))
text.new-line "end")
(text.enclose ["(" ")"])
:abstraction))
(def: #export (function name args body!)
(-> Var (List Var) Statement Statement)
(:abstraction
(format "function " (:representation name)
(|> args
..locations
(text.enclose ["(" ")"]))
(..nest (:representation body!))
text.new-line "end" ..statement-suffix)))
(def: #export break
Statement
(|> "break"
(text.suffix ..statement-suffix)
:abstraction))
)
(def: #export (cond clauses else!)
(-> (List [(Expression Any) Statement]) Statement Statement)
(list@fold (.function (_ [test then!] next!)
(..if test then! next!))
else!
(list.reverse clauses)))
|
