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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 [lua #+ Lua Expression Statement]))))
(def: prefix Text "LuxRuntime")
(def: #export unit Expression (%t //.unit))
(def: (flag value)
(-> Bit Lua)
(if value
(lua.string "")
lua.nil))
(def: (variant' tag last? value)
(-> Expression Expression Expression Expression)
(lua.table (list [//.variant-tag-field tag]
[//.variant-flag-field last?]
[//.variant-value-field value])))
(def: #export (variant tag last? value)
(-> Nat Bit Expression Expression)
(variant' (%i (.int tag)) (flag last?) value))
(def: none
Expression
(variant +0 #0 unit))
(def: some
(-> Expression Expression)
(variant +1 #1))
(def: left
(-> Expression Expression)
(variant +0 #0))
(def: right
(-> Expression Expression)
(variant +1 #1))
(type: Runtime Lua)
(def: declaration
(s.Syntax [Text (List Text)])
(p.either (p.seq s.local-identifier (p/wrap (list)))
(s.form (p.seq s.local-identifier (p.some s.local-identifier)))))
(syntax: (runtime: {[name args] declaration}
definition)
(let [implementation (code.local-identifier (format "@@" name))
runtime (code.text (format "__" prefix "__" (lang.normalize-name name)))
argsC+ (list/map code.local-identifier args)
argsLC+ (list/map (|>> lang.normalize-name code.text) args)
declaration (` ((~ (code.local-identifier name))
(~+ argsC+)))
type (` (-> (~+ (list.repeat (list.size argsC+) (` lua.Lua)))
lua.Lua))]
(wrap (list (` (def: #export (~ declaration)
(~ type)
(lua.apply (~ runtime) (list (~+ argsC+)))))
(` (def: (~ implementation)
Lua
(~ (case argsC+
#.Nil
(` (lua.global! (~ runtime) (#.Some (~ definition))))
_
(` (let [(~' @) (~ runtime)
(~+ (|> (list.zip2 argsC+ argsLC+)
(list/map (function (_ [left right]) (list left right)))
list/join))]
(lua.function! (~ runtime) (list (~+ argsLC+))
(~ definition))))))))))))
(runtime: (array//copy array)
(lua.block! (list (lua.local! "temp" (#.Some (lua.array (list))))
(lua.for-step! "idx" (lua.int 1) (lua.length array) (lua.int 1)
(lua.apply "table.insert" (list "temp" (lua.nth "idx" array))))
(lua.return! "temp"))))
(runtime: (array//sub array from to)
(lua.block! (list (lua.local! "temp" (#.Some (lua.array (list))))
(lua.for-step! "idx" from to (lua.int 1)
(lua.apply "table.insert" (list "temp" (lua.nth "idx" array))))
(lua.return! "temp"))))
(runtime: (array//concat left right)
(let [copy! (function (_ input output)
(lua.for-step! "idx" (lua.int 1) (format input ".n") (lua.int 1)
(lua.apply "table.insert" (list output (lua.nth "idx" input)))))]
(lua.block! (list (lua.local! "temp" (#.Some (lua.array (list))))
(copy! left "temp")
(copy! right "temp")
(lua.return! "temp")))))
(runtime: (lux//try op)
(lua.block! (list (format "local success, value = " (lua.apply "pcall" (list (lua.function (list) (lua.return! (lua.apply op (list unit)))))) ";")
(lua.if! "success"
(lua.return! (right "value"))
(lua.return! (left "value"))))))
(runtime: (lux//program-args program-args)
(lua.block! (list (lua.local! "inputs" (#.Some none))
(lua.for-step! "idx" (lua.length program-args) (lua.int 1) (lua.int -1)
(lua.set! "inputs" (some (lua.array (list (lua.nth "idx" program-args)
"inputs")))))
(lua.return! "inputs"))))
(def: runtime//lux
Runtime
(format @@lux//try
@@lux//program-args))
(runtime: (product//left product index)
(lua.block! (list (lua.local! "index_min_length" (#.Some (lua.+ (lua.int 1) index)))
(lua.if! (lua.>= "index_min_length" (lua.length product))
## No need for recursion
(lua.return! (lua.nth "index_min_length" product))
## Needs recursion
(lua.return! (product//left (lua.nth (lua.length product)
product)
(lua.- (lua.length product)
"index_min_length")))))))
(runtime: (product//right product index)
(lua.block! (list (lua.local! "index_min_length" (#.Some (lua.+ (lua.int 1) index)))
(lua.cond! (list [(lua.= "index_min_length" (lua.length product))
## Last element.
(lua.return! (lua.nth "index_min_length" product))]
[(lua.< "index_min_length" (lua.length product))
## Needs recursion
(lua.return! (product//right (lua.nth (lua.length product)
product)
(lua.- (lua.length product)
"index_min_length")))])
## Must slice
(lua.return! (array//sub product "index_min_length" (lua.length product)))))))
(runtime: (sum//get sum wantedTag wantsLast)
(let [no-match! (lua.return! lua.nil)
sum-tag (format "sum." //.variant-tag-field)
sum-flag (format "sum." //.variant-flag-field)
sum-value (format "sum." //.variant-value-field)
is-last? (lua.= (lua.string "") sum-flag)
test-recursion! (lua.if! is-last?
## Must recurse.
(lua.return! (sum//get sum-value (lua.- sum-tag wantedTag) wantsLast))
no-match!)]
(lua.cond! (list [(lua.= sum-tag wantedTag)
(lua.if! (lua.= wantsLast sum-flag)
(lua.return! sum-value)
test-recursion!)]
[(lua.> sum-tag wantedTag)
test-recursion!]
[(lua.and (lua.< sum-tag wantedTag)
(lua.= (lua.string "") wantsLast))
(lua.return! (variant' (lua.- wantedTag sum-tag) sum-flag sum-value))])
no-match!)))
(def: runtime//adt
Runtime
(format @@product//left
@@product//right
@@sum//get))
(runtime: (bit//logical-right-shift param subject)
(let [mask (|> (lua.int 1)
(lua.bit-shl (lua.- param (lua.int 64)))
(lua.- (lua.int 1)))]
(lua.return! (|> subject
(lua.bit-shr param)
(lua.bit-and mask)))))
(def: runtime//bit
Runtime
@@bit//logical-right-shift)
(runtime: (text//index subject param start)
(lua.block! (list (lua.local! "idx" (#.Some (lua.apply "string.find" (list subject param start (lua.bool #1)))))
(lua.if! (lua.= lua.nil "idx")
(lua.return! none)
(lua.return! (some "idx"))))))
(runtime: (text//clip text from to)
(lua.block! (list (lua.local! "size" (#.Some (lua.apply "string.len" (list text))))
(lua.if! (lua.or (lua.> "size" from)
(lua.> "size" to))
(lua.return! none)
(lua.return! (some (lua.apply "string.sub" (list text from to))))))))
(runtime: (text//char text idx)
(lua.block! (list (lua.local! "char" (#.Some (lua.apply "string.byte" (list text idx))))
(lua.if! (lua.= lua.nil "char")
(lua.return! none)
(lua.return! (some "char"))))))
(def: runtime//text
Runtime
(format @@text//index
@@text//clip
@@text//char))
(def: (check-index-out-of-bounds array idx body!)
(-> Expression Expression Statement Statement)
(lua.if! (lua.<= (lua.length array)
idx)
body!
(lua.error (lua.string "Array index out of bounds!"))))
(runtime: (array//new size)
(lua.block! (list (lua.local! "output" (#.Some (lua.array (list))))
(lua.for-step! "idx" (lua.int 1) size (lua.int 1)
(lua.apply "table.insert" (list "output" unit)))
(lua.return! "output"))))
(runtime: (array//get array idx)
(<| (check-index-out-of-bounds array idx)
(lua.block! (list (lua.local! "temp" (#.Some (lua.nth idx array)))
(lua.if! (lua.or (lua.= lua.nil "temp")
(lua.= unit "temp"))
(lua.return! none)
(lua.return! (some "temp")))))))
(runtime: (array//put array idx value)
(<| (check-index-out-of-bounds array idx)
(lua.block! (list (lua.set! (lua.nth idx array) value)
(lua.return! array)))))
(def: runtime//array
Runtime
(format @@array//sub
@@array//concat
@@array//copy
@@array//new
@@array//get
@@array//put
))
(runtime: (box//write value box)
(lua.block! (list (lua.set! (lua.nth (lua.int 0) box)
value)
(lua.return! unit))))
(def: runtime//box
Runtime
(format @@box//write))
(runtime: (lua//get object field)
(lua.block! (list (lua.local! "value" (#.Some (lua.nth field object)))
(lua.if! (lua.= lua.nil "value")
(lua.return! none)
(lua.return! (some "value"))))))
(runtime: (lua//set object field value)
(lua.block! (list (lua.set! (lua.nth field object) value)
(lua.return! object))))
(def: runtime//lua
Runtime
(format @@lua//get
@@lua//set))
(def: runtime
Runtime
(format runtime//lux
runtime//adt
runtime//bit
runtime//text
runtime//array
runtime//box
runtime//lua))
(def: #export artifact Text (format prefix ".lua"))
(def: #export translate
(Meta (Process Any))
(do macro.Monad<Meta>
[_ //.init-module-buffer
_ (//.save runtime)]
(//.save-module! artifact)))
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