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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 [python #+ Expression Statement @@]))))
(def: prefix Text "LuxRuntime")
(def: #export unit Expression (python.string //.unit))
(def: (flag value)
(-> Bit Expression)
(if value
(python.string "")
python.none))
(def: (variant' tag last? value)
(-> Expression Expression Expression Expression)
(python.dict (list [(python.string //.variant-tag-field) tag]
[(python.string //.variant-flag-field) last?]
[(python.string //.variant-value-field) value])))
(def: #export (variant tag last? value)
(-> Nat Bit Expression Expression)
(variant' (python.int (.int tag))
(flag last?)
value))
(def: #export none
Expression
(variant +0 #0 unit))
(def: #export some
(-> Expression Expression)
(variant +1 #1))
(def: #export left
(-> Expression Expression)
(variant +0 #0))
(def: #export right
(-> Expression Expression)
(variant +1 #1))
(type: Runtime Statement)
(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 (format "__" prefix "__" (lang.normalize-name name))
$runtime (` (python.var (~ (code.text runtime))))
@runtime (` (@@ (~ $runtime)))
argsC+ (list/map code.local-identifier args)
argsLC+ (list/map (|>> lang.normalize-name code.text (~) (python.var) (`))
args)
declaration (` ((~ (code.local-identifier name))
(~+ argsC+)))
type (` (-> (~+ (list.repeat (list.size argsC+) (` python.Expression)))
python.Expression))]
(wrap (list (` (def: (~' #export) (~ declaration)
(~ type)
(python.apply (list (~+ argsC+)) (~ @runtime))))
(` (def: (~ implementation)
python.Statement
(~ (case argsC+
#.Nil
(` (python.set! (list (~ $runtime)) (~ definition)))
_
(` (let [(~+ (|> (list.zip2 argsC+ argsLC+)
(list/map (function (_ [left right])
(list left (` (@@ (~ right))))))
list/join))]
(python.def! (~ $runtime)
(list (~+ argsLC+))
(~ definition))))))))))))
(syntax: (with-vars {vars (s.tuple (p.many s.local-identifier))}
body)
(wrap (list (` (let [(~+ (|> vars
(list/map (function (_ var)
(list (code.local-identifier var)
(` (python.var (~ (code.text (lang.normalize-name var))))))))
list/join))]
(~ body))))))
(runtime: (lux//try op)
(let [$error (python.var "error")
$value (python.var "value")]
(python.try! ($_ python.then!
(python.set! (list $value) (python.apply (list unit) op))
(python.return! (right (@@ $value))))
(list [(list "Exception") $error
(python.return! (left (python.apply (list (@@ $error)) (python.global "str"))))]))))
(runtime: (lux//program-args program-args)
(let [$inputs (python.var "inputs")
$value (python.var "value")]
($_ python.then!
(python.set! (list $inputs) none)
(<| (python.for-in! $value program-args)
(python.set! (list $inputs)
(some (python.tuple (list (@@ $value) (@@ $inputs))))))
(python.return! (@@ $inputs)))))
(def: runtime//lux
Runtime
($_ python.then!
@@lux//try
@@lux//program-args))
(runtime: (io//log! message)
($_ python.then!
(python.print! message)
(python.return! ..unit)))
(def: (exception message)
(-> Expression Expression)
(python.apply (list message) (python.global "Exception")))
(runtime: (io//throw! message)
($_ python.then!
(python.raise! (exception message))
(python.return! ..unit)))
(runtime: (io//exit! code)
($_ python.then!
(python.import! "sys")
(python.do! (|> (python.global "sys") (python.send (list code) "exit")))
(python.return! ..unit)))
(runtime: (io//current-time! _)
($_ python.then!
(python.import! "time")
(python.return! (let [time (|> (python.global "time")
(python.send (list) "time")
(python.* (python.int 1_000)))]
(python.apply (list time) (python.global "int"))))))
(def: runtime//io
Runtime
($_ python.then!
@@io//log!
@@io//throw!
@@io//exit!
@@io//current-time!))
(runtime: (product//left product index)
(let [$index_min_length (python.var "index_min_length")]
($_ python.then!
(python.set! (list $index_min_length) (python.+ (python.int 1) index))
(python.if! (python.> (@@ $index_min_length) (python.length product))
## No need for recursion
(python.return! (python.nth index product))
## Needs recursion
(python.return! (product//left (python.nth (python.- (python.int 1)
(python.length product))
product)
(python.- (python.length product)
(@@ $index_min_length))))))))
(runtime: (product//right product index)
(let [$index_min_length (python.var "index_min_length")]
($_ python.then!
(python.set! (list $index_min_length) (python.+ (python.int 1) index))
(python.cond! (list [(python.= (@@ $index_min_length) (python.length product))
## Last element.
(python.return! (python.nth index product))]
[(python.< (@@ $index_min_length) (python.length product))
## Needs recursion
(python.return! (product//right (python.nth (python.- (python.int 1)
(python.length product))
product)
(python.- (python.length product)
(@@ $index_min_length))))])
## Must slice
(python.return! (python.slice-from index product))))))
(runtime: (sum//get sum wantedTag wantsLast)
(let [no-match! (python.return! python.none)
sum-tag (python.nth (python.string //.variant-tag-field) sum)
sum-flag (python.nth (python.string //.variant-flag-field) sum)
sum-value (python.nth (python.string //.variant-value-field) sum)
is-last? (python.= (python.string "") sum-flag)
test-recursion! (python.if! is-last?
## Must recurse.
(python.return! (sum//get sum-value (python.- sum-tag wantedTag) wantsLast))
no-match!)]
(python.cond! (list [(python.= sum-tag wantedTag)
(python.if! (python.= wantsLast sum-flag)
(python.return! sum-value)
test-recursion!)]
[(python.> sum-tag wantedTag)
test-recursion!]
[(python.and (python.< sum-tag wantedTag)
(python.= (python.string "") wantsLast))
(python.return! (variant' (python.- wantedTag sum-tag) sum-flag sum-value))])
no-match!)))
(def: runtime//adt
Runtime
($_ python.then!
@@product//left
@@product//right
@@sum//get))
(def: full-64-bits (python.code "0xFFFFFFFFFFFFFFFF"))
(runtime: (bit//64 input)
(with-vars [capped]
(python.cond! (list [(|> input (python.> full-64-bits))
(python.return! (|> input (python.bit-and full-64-bits) bit//64))]
[(|> input (python.> (python.code "0x7FFFFFFFFFFFFFFF")))
($_ python.then!
(python.set! (list capped)
(python.apply (list (|> (python.code "0x10000000000000000")
(python.- input)))
(python.global "int")))
(python.if! (|> (@@ capped) (python.<= (python.code "9223372036854775807L")))
(python.return! (|> (@@ capped) (python.* (python.int -1))))
(python.return! (python.code "-9223372036854775808L"))))])
(python.return! input))))
(runtime: (bit//logical-right-shift param subject)
(let [mask (|> (python.int 1)
(python.bit-shl (python.- param (python.int 64)))
(python.- (python.int 1)))]
(python.return! (|> subject
(python.bit-shr param)
(python.bit-and mask)))))
(def: runtime//bit
Runtime
($_ python.then!
@@bit//64
@@bit//logical-right-shift))
(runtime: (frac//decode input)
(let [$ex (python.var "ex")]
(python.try!
(python.return! (..some (python.apply (list input) (python.global "float"))))
(list [(list "Exception") $ex
(python.return! ..none)]))))
(def: runtime//frac
Runtime
($_ python.then!
@@frac//decode))
(runtime: (text//index subject param start)
(with-vars [idx]
($_ python.then!
(python.set! (list idx) (python.send (list param start) "find" subject))
(python.if! (python.= (python.int -1) (@@ idx))
(python.return! ..none)
(python.return! (..some (@@ idx)))))))
(def: inc (|>> (python.+ (python.int 1))))
(do-template [<name> <top-cmp>]
[(def: (<name> top value)
(-> Expression Expression Expression)
(python.and (|> value (python.>= (python.int 0)))
(|> value (<top-cmp> top))))]
[within? python.<]
[up-to? python.<=]
)
(runtime: (text//clip @text @from @to)
(with-vars [length]
($_ python.then!
(python.set! (list length) (python.length @text))
(python.if! ($_ python.and
(|> @to (within? (@@ length)))
(|> @from (up-to? @to)))
(python.return! (..some (|> @text (python.slice @from (inc @to)))))
(python.return! ..none)))))
(runtime: (text//char text idx)
(python.if! (|> idx (within? (python.length text)))
(python.return! (..some (python.apply (list (|> text (python.slice idx (inc idx))))
(python.global "ord"))))
(python.return! ..none)))
(def: runtime//text
Runtime
($_ python.then!
@@text//index
@@text//clip
@@text//char))
(def: (check-index-out-of-bounds array idx body!)
(-> Expression Expression Statement Statement)
(python.if! (|> idx (python.<= (python.length array)))
body!
(python.raise! (exception (python.string "Array index out of bounds!")))))
(runtime: (array//get array idx)
(with-vars [temp]
(<| (check-index-out-of-bounds array idx)
($_ python.then!
(python.set! (list temp) (python.nth idx array))
(python.if! (python.= python.none (@@ temp))
(python.return! ..none)
(python.return! (..some (@@ temp))))))))
(runtime: (array//put array idx value)
(<| (check-index-out-of-bounds array idx)
($_ python.then!
(python.set-nth! idx value array)
(python.return! array))))
(def: runtime//array
Runtime
($_ python.then!
@@array//get
@@array//put))
(runtime: (box//write value box)
($_ python.then!
(python.set-nth! (python.int 0) value box)
(python.return! ..unit)))
(def: runtime//box
Runtime
@@box//write)
(def: runtime
Runtime
($_ python.then!
runtime//lux
runtime//adt
runtime//bit
runtime//frac
runtime//text
runtime//array
runtime//box
runtime//io
))
(def: #export artifact Text (format prefix ".py"))
(def: #export translate
(Meta (Process Any))
(do macro.Monad<Meta>
[_ //.init-module-buffer
_ (//.save runtime)]
(//.save-module! artifact)))
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