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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 ["_" php #+ Expression Computation Statement]))))
(def: prefix Text "LuxRuntime")
(def: #export unit Computation (_.string //.unit))
(def: (flag value)
(-> Bit Computation)
(if value
(_.string "")
_.null))
(def: (variant' tag last? value)
(-> Expression Expression Expression Computation)
(_.array/** (list [(_.string //.variant-tag-field) tag]
[(_.string //.variant-flag-field) last?]
[(_.string //.variant-value-field) value])))
(def: #export (variant tag last? value)
(-> Nat Bit Expression Computation)
(variant' (_.int (.int tag))
(flag last?)
value))
(def: #export none
Computation
(variant +0 #0 unit))
(def: #export some
(-> Expression Computation)
(variant +1 #1))
(def: #export left
(-> Expression Computation)
(variant +0 #0))
(def: #export right
(-> Expression Computation)
(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 (` (_.global (~ (code.text runtime))))
argsC+ (list/map code.local-identifier args)
argsLC+ (list/map (|>> lang.normalize-name code.text (~) (_.var) (`))
args)
declaration (` ((~ (code.local-identifier name))
(~+ argsC+)))
type (` (-> (~+ (list.repeat (list.size argsC+) (` _.Expression)))
_.Computation))]
(wrap (list (` (def: (~' #export) (~ declaration)
(~ type)
(_.apply (list (~+ argsC+)) (~ @runtime))))
(` (def: (~ implementation)
_.Statement
(~ (case argsC+
#.Nil
(` (_.define! (~ @runtime) (~ definition)))
_
(` (let [(~+ (|> (list.zip2 argsC+ argsLC+)
(list/map (function (_ [left right])
(list left right)))
list/join))]
(_.function! (~ @runtime)
((~! list/map) _.parameter (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)
(` (_.var (~ (code.text (lang.normalize-name var))))))))
list/join))]
(~ body))))))
## (runtime: (lux//try op)
## (let [$error (_.var "error")
## $value (_.var "value")]
## (_.try! ($_ _.then!
## (_.set! (list $value) (_.apply (list unit) op))
## (_.return! (right (@@ $value))))
## (list [(list "Exception") $error
## (_.return! (left (_.apply (list (@@ $error)) (_.global "str"))))]))))
## (runtime: (lux//program-args program-args)
## (let [$inputs (_.var "inputs")
## $value (_.var "value")]
## ($_ _.then!
## (_.set! (list $inputs) none)
## (<| (_.for-in! $value program-args)
## (_.set! (list $inputs)
## (some (_.tuple (list (@@ $value) (@@ $inputs))))))
## (_.return! (@@ $inputs)))))
## (def: runtime//lux
## Runtime
## ($_ _.then!
## @@lux//try
## @@lux//program-args))
## (runtime: (io//log! message)
## ($_ _.then!
## (_.print! message)
## (_.return! ..unit)))
## (def: (exception message)
## (-> Expression Computation)
## (_.apply (list message) (_.global "Exception")))
## (runtime: (io//throw! message)
## ($_ _.then!
## (_.raise! (exception message))
## (_.return! ..unit)))
## (runtime: (io//exit! code)
## ($_ _.then!
## (_.import! "sys")
## (_.do! (|> (_.global "sys") (_.send (list code) "exit")))
## (_.return! ..unit)))
## (runtime: (io//current-time! _)
## ($_ _.then!
## (_.import! "time")
## (_.return! (let [time (|> (_.global "time")
## (_.send (list) "time")
## (_.* (_.int 1,000)))]
## (_.apply (list time) (_.global "int"))))))
## (def: runtime//io
## Runtime
## ($_ _.then!
## @@io//log!
## @@io//throw!
## @@io//exit!
## @@io//current-time!))
(runtime: (product//left product index)
(let [$index_min_length (_.var "index_min_length")]
(|> (_.set! $index_min_length (_.+ (_.int 1) index))
(_.then! (_.if! (_.> $index_min_length (_.count/1 product))
## No need for recursion
(_.return! (_.nth index product))
## Needs recursion
(_.return! (product//left (_.nth (_.- (_.int 1)
(_.count/1 product))
product)
(_.- (_.count/1 product)
$index_min_length))))))))
(runtime: (product//right product index)
(let [$index_min_length (_.var "index_min_length")]
(|> (_.set! $index_min_length (_.+ (_.int 1) index))
(_.then! (<| (_.if! (_.= $index_min_length (_.count/1 product))
## Last element.
(_.return! (_.nth index product)))
(_.if! (_.< $index_min_length (_.count/1 product))
## Needs recursion
(_.return! (product//right (_.nth (_.- (_.int 1)
(_.count/1 product))
product)
(_.- (_.count/1 product)
$index_min_length))))
## Must slice
(_.return! (_.array-slice/2 product index)))))))
(runtime: (sum//get sum wantedTag wantsLast)
(let [no-match! (_.return! _.null)
sum-tag (_.nth (_.string //.variant-tag-field) sum)
sum-flag (_.nth (_.string //.variant-flag-field) sum)
sum-value (_.nth (_.string //.variant-value-field) sum)
is-last? (_.= (_.string "") sum-flag)
test-recursion! (_.if! is-last?
## Must recurse.
(_.return! (sum//get sum-value (_.- sum-tag wantedTag) wantsLast))
no-match!)]
(<| (_.if! (_.= sum-tag wantedTag)
(_.if! (|> (_.and (_.is-null/1 wantsLast) (_.is-null/1 sum-flag))
(_.or (|> (_.and (_.not (_.is-null/1 wantsLast))
(_.not (_.is-null/1 sum-flag)))
(_.and (_.= wantsLast sum-flag)))))
(_.return! sum-value)
test-recursion!))
(_.if! (_.> sum-tag wantedTag)
test-recursion!)
(_.if! (|> (_.< sum-tag wantedTag)
(_.and (_.not (_.is-null/1 wantsLast))))
(_.return! (variant' (_.- wantedTag sum-tag) sum-flag sum-value)))
no-match!)))
(def: runtime//adt
Runtime
(|> @@product//left
(_.then! @@product//right)
(_.then! @@sum//get)))
## (runtime: (bit//logical-right-shift param subject)
## (let [mask (|> (_.int 1)
## (_.bit-shl (_.- param (_.int 64)))
## (_.- (_.int 1)))]
## (_.return! (|> subject
## (_.bit-shr param)
## (_.bit-and mask)))))
## (def: runtime//bit
## Runtime
## ($_ _.then!
## @@bit//logical-right-shift))
## (runtime: (text//index subject param start)
## (with-vars [idx]
## ($_ _.then!
## (_.set! (list idx) (_.send (list param start) "find" subject))
## (_.if! (_.= (_.int -1) (@@ idx))
## (_.return! ..none)
## (_.return! (..some (@@ idx)))))))
## (def: inc (|>> (_.+ (_.int 1))))
## (do-template [<name> <top-cmp>]
## [(def: (<name> top value)
## (-> Expression Expression Expression)
## (_.and (|> value (_.>= (_.int 0)))
## (|> value (<top-cmp> top))))]
## [within? _.<]
## [up-to? _.<=]
## )
## (runtime: (text//clip @text @from @to)
## (with-vars [length]
## ($_ _.then!
## (_.set! (list length) (_.count/1 @text))
## (_.if! ($_ _.and
## (|> @to (within? (@@ length)))
## (|> @from (up-to? @to)))
## (_.return! (..some (|> @text (_.slice @from (inc @to)))))
## (_.return! ..none)))))
## (runtime: (text//char text idx)
## (_.if! (|> idx (within? (_.count/1 text)))
## (_.return! (..some (_.apply (list (|> text (_.slice idx (inc idx))))
## (_.global "ord"))))
## (_.return! ..none)))
## (def: runtime//text
## Runtime
## ($_ _.then!
## @@text//index
## @@text//clip
## @@text//char))
## (def: (check-index-out-of-bounds array idx body!)
## (-> Expression Expression Statement Statement)
## (_.if! (|> idx (_.<= (_.count/1 array)))
## body!
## (_.raise! (exception (_.string "Array index out of bounds!")))))
## (runtime: (array//get array idx)
## (with-vars [temp]
## (<| (check-index-out-of-bounds array idx)
## ($_ _.then!
## (_.set! (list temp) (_.nth idx array))
## (_.if! (_.= _.null (@@ temp))
## (_.return! ..none)
## (_.return! (..some (@@ temp))))))))
## (runtime: (array//put array idx value)
## (<| (check-index-out-of-bounds array idx)
## ($_ _.then!
## (_.set-nth! idx value array)
## (_.return! array))))
## (def: runtime//array
## Runtime
## ($_ _.then!
## @@array//get
## @@array//put))
(def: check-necessary-conditions!
Statement
(let [condition (_.= (_.int 8)
(_.global "PHP_INT_SIZE"))
error-message (_.string (format "Cannot run program!" "\n"
"Lux/PHP programs require 64-bit PHP builds!"))
->Exception (|>> (list) (_.new (_.global "Exception")))]
(_.when! (_.not condition)
(_.throw! (->Exception error-message)))))
(def: runtime
Runtime
(|> check-necessary-conditions!
## runtime//lux
(_.then! runtime//adt)
## runtime//bit
## runtime//text
## runtime//array
## runtime//io
))
(def: #export artifact Text (format prefix //.extension))
(def: #export translate
(Meta (Process Any))
(do macro.Monad<Meta>
[_ //.init-module-buffer
_ (//.save runtime)]
(//.save-module! artifact)))
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