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(.module:
lux
(lux (control ["p" parser "p/" Monad<Parser>]
[monad #+ do])
(data text/format
(coll [list "list/" Monad<List>]))
[macro]
(macro [code]
["s" syntax #+ syntax:])
[io #+ Process])
[//]
(luxc [lang]
(lang (host [ruby #+ Ruby Expression Statement]))))
(def: prefix Text "LuxRuntime")
(def: #export unit Expression (%t //.unit))
(def: (flag value)
(-> Bool Ruby)
(if value
(ruby.string "")
ruby.nil))
(def: (variant' tag last? value)
(-> Expression Expression Expression Expression)
(ruby.dictionary (list [(ruby.string //.variant-tag-field) tag]
[(ruby.string //.variant-flag-field) last?]
[(ruby.string //.variant-value-field) value])))
(def: #export (variant tag last? value)
(-> Nat Bool Expression Expression)
(variant' (%i (nat-to-int tag)) (flag last?) value))
(def: #export none
Expression
(variant +0 false unit))
(def: #export some
(-> Expression Expression)
(variant +1 true))
(def: #export left
(-> Expression Expression)
(variant +0 false))
(def: #export right
(-> Expression Expression)
(variant +1 true))
(type: Runtime Ruby)
(def: declaration
(s.Syntax [Text (List Text)])
(p.either (p.seq s.local-symbol (p/wrap (list)))
(s.form (p.seq s.local-symbol (p.some s.local-symbol)))))
(syntax: (runtime: {[name args] declaration}
definition)
(let [implementation (code.local-symbol (format "@@" name))
runtime (code.text (format "__" prefix "__" (lang.normalize-name name)))
argsC+ (list/map code.local-symbol args)
argsLC+ (list/map (|>> lang.normalize-name code.text) args)
declaration (` ((~ (code.local-symbol name))
(~+ argsC+)))
type (` (-> (~+ (list.repeat (list.size argsC+) (` ruby.Ruby)))
ruby.Ruby))]
(wrap (list (` (def: #export (~ declaration)
(~ type)
(ruby.apply (~ runtime) (list (~+ argsC+)))))
(` (def: (~ implementation)
Ruby
(~ (case argsC+
#.Nil
(` (ruby.set! (list (~ runtime)) (~ definition)))
_
(` (let [(~' @) (~ runtime)
(~+ (|> (list.zip2 argsC+ argsLC+)
(list/map (function (_ [left right]) (list left right)))
list/join))]
(ruby.function! (~ runtime)
(list (~+ argsLC+))
(~ definition))))))))))))
(runtime: (lux//try op)
(ruby.begin! (ruby.block! (list (ruby.set! (list "value") (ruby.call (list unit) op))
(ruby.return! (right "value"))))
(list [(list) "error"
(ruby.return! (left (ruby.field "message" "error")))])))
(runtime: (lux//program-args program-args)
(ruby.block! (list (ruby.set! (list "inputs") none)
(ruby.for-in! "value" program-args
(ruby.set! (list "inputs") (some (ruby.array (list "value" "inputs")))))
(ruby.return! "inputs"))))
(def: runtime//lux
Runtime
(format @@lux//try "\n"
@@lux//program-args "\n"))
(runtime: (product//left product index)
(ruby.block! (list (ruby.set! (list "index_min_length") (ruby.+ (ruby.int 1) index))
(ruby.if! (ruby.> "index_min_length" (ruby.length product))
## No need for recursion
(ruby.return! (ruby.nth index product))
## Needs recursion
(ruby.return! (product//left (ruby.nth (ruby.- (ruby.int 1)
(ruby.length product))
product)
(ruby.- (ruby.length product)
"index_min_length")))))))
(runtime: (product//right product index)
(ruby.block! (list (ruby.set! (list "index_min_length") (ruby.+ (ruby.int 1) index))
(ruby.cond! (list [(ruby.= "index_min_length" (ruby.length product))
## Last element.
(ruby.return! (ruby.nth index product))]
[(ruby.< "index_min_length" (ruby.length product))
## Needs recursion
(ruby.return! (product//right (ruby.nth (ruby.- (ruby.int 1)
(ruby.length product))
product)
(ruby.- (ruby.length product)
"index_min_length")))])
## Must slice
(ruby.return! (ruby.array-range index (ruby.length product) product))))))
(runtime: (sum//get sum wantedTag wantsLast)
(let [no-match! (ruby.return! ruby.nil)
sum-tag (ruby.nth (ruby.string //.variant-tag-field) sum)
sum-flag (ruby.nth (ruby.string //.variant-flag-field) sum)
sum-value (ruby.nth (ruby.string //.variant-value-field) sum)
is-last? (ruby.= (ruby.string "") sum-flag)
test-recursion! (ruby.if! is-last?
## Must recurse.
(ruby.return! (sum//get sum-value (ruby.- sum-tag wantedTag) wantsLast))
no-match!)]
(ruby.cond! (list [(ruby.= sum-tag wantedTag)
(ruby.if! (ruby.= wantsLast sum-flag)
(ruby.return! sum-value)
test-recursion!)]
[(ruby.> sum-tag wantedTag)
test-recursion!]
[(ruby.and (ruby.< sum-tag wantedTag)
(ruby.= (ruby.string "") wantsLast))
(ruby.return! (variant' (ruby.- wantedTag sum-tag) sum-flag sum-value))])
no-match!)))
(def: runtime//adt
Runtime
(format @@product//left "\n"
@@product//right "\n"
@@sum//get "\n"))
(runtime: (bit//logical-right-shift param subject)
(let [mask (|> (ruby.int 1)
(ruby.bit-shl (ruby.- param (ruby.int 64)))
(ruby.- (ruby.int 1)))]
(ruby.return! (|> subject
(ruby.bit-shr param)
(ruby.bit-and mask)))))
(def: runtime//bit
Runtime
@@bit//logical-right-shift)
(runtime: (text//index subject param start)
(ruby.block! (list (ruby.set! (list "idx") (ruby.send "index" (list param start) subject))
(ruby.if! (ruby.= ruby.nil "idx")
(ruby.return! none)
(ruby.return! (some "idx"))))))
(runtime: (text//clip text from to)
(ruby.if! ($_ ruby.and
(ruby.>= (ruby.int 0) from)
(ruby.< (ruby.send "length" (list) text) from)
(ruby.>= (ruby.int 0) to)
(ruby.< (ruby.send "length" (list) text) to)
(ruby.<= to from))
(ruby.return! (some (ruby.array-range from to text)))
(ruby.return! none)))
(runtime: (text//char text idx)
(ruby.if! (ruby.and (ruby.>= (ruby.int 0) idx)
(ruby.< (ruby.send "length" (list) text) idx))
(ruby.return! (some (ruby.send "ord" (list)
(ruby.array-range idx idx text))))
(ruby.return! none)))
(def: runtime//text
Runtime
(format @@text//index
@@text//clip
@@text//char))
(def: (check-index-out-of-bounds array idx body!)
(-> Expression Expression Statement Statement)
(ruby.if! (ruby.<= (ruby.length array)
idx)
body!
(ruby.raise (ruby.string "Array index out of bounds!"))))
(runtime: (array//get array idx)
(<| (check-index-out-of-bounds array idx)
(ruby.block! (list (ruby.set! (list "temp") (ruby.nth idx array))
(ruby.if! (ruby.= ruby.nil "temp")
(ruby.return! none)
(ruby.return! (some "temp")))))))
(runtime: (array//put array idx value)
(<| (check-index-out-of-bounds array idx)
(ruby.block! (list (ruby.set-nth! idx value array)
(ruby.return! array)))))
(def: runtime//array
Runtime
(format @@array//get
@@array//put))
(def: #export atom//field Text "_lux_atom")
(runtime: (atom//compare-and-swap atom old new)
(let [atom//field (ruby.string atom//field)]
(ruby.if! (ruby.= old (ruby.nth atom//field atom))
(ruby.block! (list (ruby.set-nth! atom//field new atom)
(ruby.return! (ruby.bool true))))
(ruby.return! (ruby.bool false)))))
(def: runtime//atom
Runtime
(format @@atom//compare-and-swap "\n"))
(runtime: (box//write value box)
(ruby.block! (list (ruby.set-nth! (ruby.int 0) value box)
(ruby.return! ..unit))))
(def: runtime//box
Runtime
(format @@box//write))
(runtime: (process//schedule milli-seconds procedure)
(ruby.block!
(list (format "(Thread.new {"
(ruby.when! (ruby.not (ruby.= (ruby.int 0) milli-seconds))
(ruby.statement (ruby.apply "sleep" (list (ruby./ (ruby.float 1_000.0) milli-seconds)))))
(ruby.statement (ruby.call (list ..unit) procedure))
"})")
(ruby.return! ..unit))))
(def: runtime//process
Runtime
@@process//schedule)
(def: runtime
Runtime
(format runtime//lux "\n"
runtime//adt "\n"
runtime//bit "\n"
runtime//text "\n"
runtime//array "\n"
runtime//atom "\n"
runtime//box "\n"
runtime//process "\n"
))
(def: #export artifact Text (format prefix ".rb"))
(def: #export translate
(Meta (Process Any))
(do macro.Monad<Meta>
[_ //.init-module-buffer
_ (//.save runtime)]
(//.save-module! artifact)))
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