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(.module:
[lux #*
["." host]
[abstract
["." equivalence (#+ Equivalence)]
[monad (#+ Monad do)]]
[control
["." state (#+ State')]
["." try (#+ Try)]]
[data
[number
["." i32]
["n" nat]
["." int]
["." frac]]
["." text]
["." format #_
["#" binary (#+ Writer) ("specification@." monoid)]]
[collection
["." row (#+ Row) ("#@." fold)]]]
[type
abstract]
[macro
["." template]]]
["." // (#+ UTF8 String Class Integer Float Long Double Constant Name-And-Type Reference)
[//
[encoding
["#." name (#+ Internal External)]
["#." unsigned]]
["#." index (#+ Index)]
[type
[category (#+ Value Method)]
["#." descriptor (#+ Descriptor)]]]])
(type: #export Pool [Index (Row [Index Constant])])
(def: #export equivalence
(Equivalence Pool)
(equivalence.product //index.equivalence
(row.equivalence (equivalence.product //index.equivalence
//.equivalence))))
(type: #export (Resource a)
(State' Try Pool a))
(def: #export monad
(Monad Resource)
(state.with try.monad))
(template: (!add <tag> <equivalence> <value>)
(function (_ [current pool])
(let [<value>' <value>]
(with-expansions [<try-again> (as-is (recur (.inc idx)))]
(loop [idx 0]
(case (row.nth idx pool)
(#try.Success entry)
(case entry
[index (<tag> reference)]
(if (:: <equivalence> = reference <value>')
(#try.Success [[current pool]
index])
<try-again>)
_
<try-again>)
(#try.Failure _)
(let [new (<tag> <value>')]
(do try.monad
[@new (//unsigned.u2 (//.size new))
next (: (Try Index)
(|> current
//index.value
(//unsigned.+/2 @new)
(:: @ map //index.index)))]
(wrap [[next
(row.add [current new] pool)]
current])))))))))
(template: (!index <index>)
(|> <index> //index.value //unsigned.value))
(type: (Adder of)
(-> of (Resource (Index of))))
(template [<name> <type> <tag> <equivalence>]
[(def: #export (<name> value)
(Adder <type>)
(!add <tag> <equivalence> value))]
[integer Integer #//.Integer (//.value-equivalence i32.equivalence)]
[float Float #//.Float (//.value-equivalence //.float-equivalence)]
[long Long #//.Long (//.value-equivalence int.equivalence)]
[double Double #//.Double (//.value-equivalence frac.equivalence)]
[utf8 UTF8 #//.UTF8 text.equivalence]
)
(def: #export (string value)
(-> Text (Resource (Index String)))
(do ..monad
[@value (utf8 value)
#let [value (//.string @value)]]
(!add #//.String (//.value-equivalence //index.equivalence) value)))
(def: #export (class name)
(-> Internal (Resource (Index Class)))
(do ..monad
[@name (utf8 (//name.read name))
#let [value (//.class @name)]]
(!add #//.Class //.class-equivalence value)))
(def: #export (descriptor value)
(All [kind]
(-> (Descriptor kind)
(Resource (Index (Descriptor kind)))))
(let [value (//descriptor.descriptor value)]
(!add #//.UTF8 text.equivalence value)))
(type: #export (Member of)
{#name UTF8
#descriptor (Descriptor of)})
(def: #export (name-and-type [name descriptor])
(All [of]
(-> (Member of) (Resource (Index (Name-And-Type of)))))
(do ..monad
[@name (utf8 name)
@descriptor (..descriptor descriptor)]
(!add #//.Name-And-Type //.name-and-type-equivalence {#//.name @name #//.descriptor @descriptor})))
(template [<name> <tag> <of>]
[(def: #export (<name> class member)
(-> External (Member <of>) (Resource (Index (Reference <of>))))
(do ..monad
[@class (..class (//name.internal class))
@name-and-type (name-and-type member)]
(!add <tag> //.reference-equivalence {#//.class @class #//.name-and-type @name-and-type})))]
[field #//.Field Value]
[method #//.Method Method]
[interface-method #//.Interface-Method Method]
)
(def: #export writer
(Writer Pool)
(function (_ [next pool])
(row@fold (function (_ [_index post] pre)
(specification@compose pre (//.writer post)))
(format.bits/16 (!index next))
pool)))
(def: #export empty
Pool
[(|> 1 //unsigned.u2 try.assume //index.index)
row.empty])
|
