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(.module:
[library
[lux "*"
["." ffi]
[abstract
[equivalence {"+" [Equivalence]}]
[monad {"+" [Monad do]}]]
[control
["." state {"+" [+State]}]
["." try {"+" [Try]}]]
[data
["." product]
["." text]
["." format "_"
["#" binary {"+" [Writer]} ("specification\." monoid)]]
[collection
["." row {"+" [Row]} ("#\." mix)]]]
[macro
["." template]]
[math
[number
["." i32]
["n" nat]
["." int]
["." frac]]]
[type
abstract]]]
["." // {"+" [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: .public Pool
[Index (Row [Index Constant])])
(def: .public equivalence
(Equivalence Pool)
(product.equivalence //index.equivalence
(row.equivalence (product.equivalence //index.equivalence
//.equivalence))))
(type: .public (Resource a)
(+State Try Pool a))
(def: .public 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 (.++ idx)))]
(loop [idx 0]
(case (row.item 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)
(\ ! each //index.index)))]
(in [[next
(row.suffix [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: .public (<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: .public (string value)
(-> Text (Resource (Index String)))
(do ..monad
[@value (utf8 value)
.let [value (//.string @value)]]
(!add #//.String (//.value_equivalence //index.equivalence) value)))
(def: .public (class name)
(-> Internal (Resource (Index Class)))
(do ..monad
[@name (utf8 (//name.read name))
.let [value (//.class @name)]]
(!add #//.Class //.class_equivalence value)))
(def: .public (descriptor value)
(All (_ kind)
(-> (Descriptor kind)
(Resource (Index (Descriptor kind)))))
(let [value (//descriptor.descriptor value)]
(!add #//.UTF8 text.equivalence value)))
(type: .public (Member of)
(Record
[#name UTF8
#descriptor (Descriptor of)]))
(def: .public (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: .public (<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: .public writer
(Writer Pool)
(function (_ [next pool])
(row\mix (function (_ [_index post] pre)
(specification\composite pre (//.writer post)))
(format.bits/16 (!index next))
pool)))
(def: .public empty
Pool
[(|> 1 //unsigned.u2 try.trusted //index.index)
row.empty])
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