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(.module:
[lux #*
[abstract
["." monad (#+ Monad do)
[indexed (#+ IxMonad)]]]
[control
["p" parser
["s" code (#+ Parser)]]
["." exception (#+ exception:)]
["." io (#+ IO)]
[concurrency
["." promise (#+ Promise)]]]
[data
["." identity (#+ Identity)]
["." maybe]
["." product]
[number
["n" nat]]
[text
["%" format (#+ format)]]
[collection
["." set]
["." row (#+ Row)]
["." list ("#@." functor fold)]]]
["." macro
[syntax (#+ syntax:)]]
[type
abstract]])
(type: #export (Procedure monad input output value)
(-> input (monad [output value])))
(type: #export (Linear monad value)
(All [keys]
(Procedure monad keys keys value)))
(type: #export (Affine monad permissions value)
(All [keys]
(Procedure monad keys [permissions keys] value)))
(type: #export (Relevant monad permissions value)
(All [keys]
(Procedure monad [permissions keys] keys value)))
(structure: (indexed Monad<m>)
(All [m] (-> (Monad m) (IxMonad (Procedure m))))
(def: (wrap value)
(function (_ keys)
(:: Monad<m> wrap [keys value])))
(def: (bind f input)
(function (_ keysI)
(do Monad<m>
[[keysT value] (input keysI)]
((f value) keysT)))))
(template [<name> <m> <monad> <execute> <lift>]
[(def: #export <name>
(IxMonad (Procedure <m>))
(..indexed <monad>))
(def: #export (<execute> procedure)
(All [v] (-> (Linear <m> v) (<m> v)))
(do <monad>
[[_ output] (procedure [])]
(wrap output)))
(def: #export (<lift> procedure)
(All [v] (-> (<m> v) (Linear <m> v)))
(function (_ keys)
(do <monad>
[output procedure]
(wrap [keys output]))))]
[pure Identity identity.monad run-pure lift-pure]
[sync IO io.monad run-sync lift-sync]
[async Promise promise.monad run-async lift-async]
)
(abstract: #export Ordered [])
(abstract: #export Commutative [])
(abstract: #export (Key mode key)
[]
(template [<name> <mode>]
[(def: <name>
(Ex [k] (-> [] (Key <mode> k)))
(|>> :abstraction))]
[ordered-key Ordered]
[commutative-key Commutative]
))
(type: #export OK (Key Ordered))
(type: #export CK (Key Commutative))
(abstract: #export (Res key value)
value
{#.doc "A value locked by a key."}
(template [<name> <m> <monad> <mode> <key>]
[(def: #export (<name> value)
(All [v] (Ex [k] (-> v (Affine <m> (Key <mode> k) (Res k v)))))
(function (_ keys)
(:: <monad> wrap [[(<key> []) keys] (:abstraction value)])))]
[ordered-pure Identity identity.monad Ordered ordered-key]
[ordered-sync IO io.monad Ordered ordered-key]
[ordered-async Promise promise.monad Ordered ordered-key]
[commutative-sync IO io.monad Commutative commutative-key]
[commutative-pure Identity identity.monad Commutative commutative-key]
[commutative-async Promise promise.monad Commutative commutative-key]
)
(template [<name> <m> <monad>]
[(def: #export (<name> resource)
(All [v k m]
(-> (Res k v) (Relevant <m> (Key m k) v)))
(function (_ [key keys])
(:: <monad> wrap [keys (:representation resource)])))]
[read-pure Identity identity.monad]
[read-sync IO io.monad]
[read-async Promise promise.monad]
))
(exception: #export (index-cannot-be-repeated {index Nat})
(exception.report
["Index" (%.nat index)]))
(exception: #export amount-cannot-be-zero)
(def: indices
(Parser (List Nat))
(s.tuple (loop [seen (set.new n.hash)]
(do {@ p.monad}
[done? s.end?]
(if done?
(wrap (list))
(do @
[head s.nat
_ (p.assert (exception.construct index-cannot-be-repeated head)
(not (set.member? seen head)))
tail (recur (set.add head seen))]
(wrap (list& head tail))))))))
(def: (no-op Monad<m>)
(All [m] (-> (Monad m) (Linear m Any)))
(function (_ context) (:: Monad<m> wrap [context []])))
(template [<name> <m> <monad>]
[(syntax: #export (<name> {swaps ..indices})
(macro.with-gensyms [g!_ g!context]
(case swaps
#.Nil
(wrap (list (` ((~! no-op) <monad>))))
(#.Cons head tail)
(do {@ macro.monad}
[#let [max-idx (list@fold n.max head tail)]
g!inputs (<| (monad.seq @) (list.repeat (inc max-idx)) (macro.gensym "input"))
#let [g!outputs (|> (monad.fold maybe.monad
(function (_ from to)
(do maybe.monad
[input (list.nth from g!inputs)]
(wrap (row.add input to))))
(: (Row Code) row.empty)
swaps)
maybe.assume
row.to-list)
g!inputsT+ (list@map (|>> (~) ..CK (`)) g!inputs)
g!outputsT+ (list@map (|>> (~) ..CK (`)) g!outputs)]]
(wrap (list (` (: (All [(~+ g!inputs) (~ g!context)]
(Procedure (~! <m>)
[(~+ g!inputsT+) (~ g!context)]
[(~+ g!outputsT+) (~ g!context)]
.Any))
(function ((~ g!_) [(~+ g!inputs) (~ g!context)])
(:: (~! <monad>) (~' wrap) [[(~+ g!outputs) (~ g!context)] []]))))))))))]
[exchange-pure Identity identity.monad]
[exchange-sync IO io.monad]
[exchange-async Promise promise.monad]
)
(def: amount
(Parser Nat)
(do p.monad
[raw s.nat
_ (p.assert (exception.construct amount-cannot-be-zero [])
(n.> 0 raw))]
(wrap raw)))
(template [<name> <m> <monad> <from> <to>]
[(syntax: #export (<name> {amount ..amount})
(macro.with-gensyms [g!_ g!context]
(do {@ macro.monad}
[g!keys (<| (monad.seq @) (list.repeat amount) (macro.gensym "keys"))]
(wrap (list (` (: (All [(~+ g!keys) (~ g!context)]
(Procedure (~! <m>)
[<from> (~ g!context)]
[<to> (~ g!context)]
.Any))
(function ((~ g!_) [<from> (~ g!context)])
(:: (~! <monad>) (~' wrap) [[<to> (~ g!context)] []])))))))))]
[group-pure Identity identity.monad (~+ g!keys) [(~+ g!keys)]]
[group-sync IO io.monad (~+ g!keys) [(~+ g!keys)]]
[group-async Promise promise.monad (~+ g!keys) [(~+ g!keys)]]
[un-group-pure Identity identity.monad [(~+ g!keys)] (~+ g!keys)]
[un-group-sync IO io.monad [(~+ g!keys)] (~+ g!keys)]
[un-group-async Promise promise.monad [(~+ g!keys)] (~+ g!keys)]
)
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