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(.module:
[lux #*
[abstract
[monad (#+ do)]]
[control
["." function]
["p" parser ("#;." monad)
["s" code (#+ Parser)]]]
[data
[number (#+ hex)]
[text
format]
[collection
["." list ("#;." monad)]]]
[macro
["." code]
[syntax (#+ syntax:)]]
[target
["_" scheme (#+ Expression Computation Var)]]]
["." ///
["#/" //
["#/" // #_
[analysis (#+ Variant)]
["#." name]
["#." synthesis]]]])
(template [<name> <base>]
[(type: #export <name>
(<base> Var Expression Expression))]
[Operation ///.Operation]
[Phase ///.Phase]
[Handler ///.Handler]
[Bundle ///.Bundle]
)
(def: prefix Text "LuxRuntime")
(def: unit (_.string /////synthesis.unit))
(def: (flag value)
(-> Bit Computation)
(if value
(_.string "")
_.nil))
(def: (variant' tag last? value)
(-> Expression Expression Expression Computation)
(<| (_.cons/2 tag)
(_.cons/2 last?)
value))
(def: #export (variant [lefts right? value])
(-> (Variant Expression) Computation)
(variant' (_.int (.int lefts)) (flag right?) value))
(def: #export none
Computation
(variant [0 #0 ..unit]))
(def: #export some
(-> Expression Computation)
(|>> [0 #1] ..variant))
(def: #export left
(-> Expression Computation)
(|>> [0 #0] ..variant))
(def: #export right
(-> Expression Computation)
(|>> [0 #1] ..variant))
(def: declaration
(Parser [Text (List Text)])
(p.either (p.and s.local-identifier (p;wrap (list)))
(s.form (p.and s.local-identifier (p.some s.local-identifier)))))
(syntax: (runtime: {[name args] declaration}
definition)
(let [implementation (code.local-identifier (format "@@" name))
runtime (format prefix "__" (/////name.normalize name))
@runtime (` (_.var (~ (code.text runtime))))
argsC+ (list;map code.local-identifier args)
argsLC+ (list;map (|>> /////name.normalize (format "LRV__") code.text (~) (_.var) (`))
args)
declaration (` ((~ (code.local-identifier name))
(~+ argsC+)))
type (` (-> (~+ (list.repeat (list.size argsC+) (` _.Expression)))
_.Computation))]
(wrap (list (` (def: (~' #export) (~ declaration)
(~ type)
(~ (case argsC+
#.Nil
@runtime
_
(` (_.apply/* (~ @runtime) (list (~+ argsC+))))))))
(` (def: (~ implementation)
_.Computation
(~ (case argsC+
#.Nil
(` (_.define-constant (~ @runtime) [(list) #.None] (~ definition)))
_
(` (let [(~+ (|> (list.zip2 argsC+ argsLC+)
(list;map (function (_ [left right])
(list left right)))
list;join))]
(_.define-function (~ @runtime) [(list (~+ argsLC+)) #.None]
(~ definition))))))))))))
(runtime: (slice offset length list)
(<| (_.if (_.null?/1 list)
list)
(_.if (|> offset (_.>/2 (_.int +0)))
(slice (|> offset (_.-/2 (_.int +1)))
length
(_.cdr/1 list)))
(_.if (|> length (_.>/2 (_.int +0)))
(_.cons/2 (_.car/1 list)
(slice offset
(|> length (_.-/2 (_.int +1)))
(_.cdr/1 list))))
_.nil))
(syntax: #export (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 (format "LRV__" (/////name.normalize var)))))))))
list;join))]
(~ body))))))
(runtime: (lux//try op)
(with-vars [error]
(_.with-exception-handler
(_.lambda [(list error) #.None]
(..left error))
(_.lambda [(list) #.None]
(..right (_.apply/* op (list ..unit)))))))
(runtime: (lux//program-args program-args)
(with-vars [@loop @input @output]
(_.letrec (list [@loop (_.lambda [(list @input @output) #.None]
(_.if (_.eqv?/2 _.nil @input)
@output
(_.apply/2 @loop (_.cdr/1 @input) (..some (_.vector/* (list (_.car/1 @input) @output))))))])
(_.apply/2 @loop (_.reverse/1 program-args) ..none))))
(def: runtime//lux
Computation
(_.begin (list @@lux//try
@@lux//program-args)))
(def: last-index
(-> Expression Computation)
(|>> _.length/1 (_.-/2 (_.int +1))))
(runtime: (tuple//left lefts tuple)
(with-vars [last-index-right]
(_.begin
(list (_.define-constant last-index-right (..last-index tuple))
(_.if (_.>/2 lefts last-index-right)
## No need for recursion
(_.vector-ref/2 tuple lefts)
## Needs recursion
(tuple//left (_.-/2 last-index-right lefts)
(_.vector-ref/2 tuple last-index-right)))))))
(runtime: (tuple//right lefts tuple)
(with-vars [last-index-right right-index @slice]
(_.begin
(list (_.define-constant last-index-right (..last-index tuple))
(_.define-constant right-index (_.+/2 (_.int +1) lefts))
(_.cond (list [(_.=/2 last-index-right right-index)
(_.vector-ref/2 tuple right-index)]
[(_.>/2 last-index-right right-index)
## Needs recursion.
(tuple//right (_.-/2 last-index-right lefts)
(_.vector-ref/2 tuple last-index-right))])
(_.begin
(list (_.define-constant @slice (_.make-vector/1 (_.-/2 right-index (_.length/1 tuple))))
(_.vector-copy!/5 @slice (_.int +0) tuple right-index (_.length/1 tuple))
@slice))))
)))
(runtime: (sum//get sum last? wanted-tag)
(with-vars [sum-tag sum-flag sum-value]
(let [no-match _.nil
is-last? (|> sum-flag (_.eqv?/2 (_.string "")))
test-recursion (_.if is-last?
## Must recurse.
(sum//get sum-value
(|> wanted-tag (_.-/2 sum-tag))
last?)
no-match)]
(<| (_.let (list [sum-tag (_.car/1 sum)]
[sum-value (_.cdr/1 sum)]))
(_.let (list [sum-flag (_.car/1 sum-value)]
[sum-value (_.cdr/1 sum-value)]))
(_.if (|> wanted-tag (_.=/2 sum-tag))
(_.if (|> sum-flag (_.eqv?/2 last?))
sum-value
test-recursion))
(_.if (|> wanted-tag (_.>/2 sum-tag))
test-recursion)
(_.if (_.and (list (|> last? (_.eqv?/2 (_.string "")))
(|> wanted-tag (_.</2 sum-tag))))
(variant' (|> sum-tag (_.-/2 wanted-tag)) sum-flag sum-value))
no-match))))
(def: runtime//adt
Computation
(_.begin (list @@tuple//left
@@tuple//right
@@sum//get)))
(runtime: (i64//logical-right-shift shift input)
(_.if (_.=/2 (_.int +0) shift)
input
(|> input
(_.arithmetic-shift/2 (_.*/2 (_.int -1) shift))
(_.bit-and/2 (_.int (hex "+7FFFFFFFFFFFFFFF"))))))
(def: runtime//bit
Computation
(_.begin (list @@i64//logical-right-shift)))
(runtime: (frac//decode input)
(with-vars [@output]
(_.let (list [@output ((_.apply/1 (_.global "string->number")) input)])
(_.if (_.and (list (_.not/1 (_.=/2 @output @output))
(_.not/1 (_.eqv?/2 (_.string "+nan.0") input))))
..none
(..some @output)))))
(def: runtime//frac
Computation
(_.begin
(list @@frac//decode)))
(runtime: (io//current-time _)
(|> (_.apply/* (_.global "current-second") (list))
(_.*/2 (_.int +1,000))
_.exact/1))
(def: runtime//io
(_.begin (list @@io//current-time)))
(def: runtime
Computation
(_.begin (list @@slice
runtime//lux
runtime//bit
runtime//adt
runtime//frac
runtime//io
)))
(def: #export generate
(Operation Any)
(///.with-buffer
(do ////.monad
[_ (///.save! true ["" ..prefix]
..runtime)]
(///.save-buffer! ""))))
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