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(.require
[library
[lux (.except Info Code Type)
[abstract
[monad (.only do)]
["[0]" equivalence (.only Equivalence)]]
[control
["[0]" try]
["[0]" exception (.only exception:)]]
[data
["[0]" sum]
["[0]" product]
["[0]" binary
["[1]F" \\format (.only Writer)]]]
[macro
["^" pattern]]
[math
[number
["n" nat]]]]]
["[0]" //
["[1][0]" index (.only Index)]
["[1][0]" type (.only Type)
["[2][0]" signature (.only Signature)]]
[encoding
["[1][0]" unsigned (.only U2 U4)]]
["[1][0]" constant (.only UTF8 Class Value)
["[2][0]" pool (.only Pool Resource) (.use "[1]#[0]" monad)]]]
["[0]" /
["[1][0]" constant (.only Constant)]
["[1][0]" code]])
(type: .public (Info about)
(Record
[#name (Index UTF8)
#length U4
#info about]))
(def .public (info_equivalence Equivalence<about>)
(All (_ about)
(-> (Equivalence about)
(Equivalence (Info about))))
(all product.equivalence
//index.equivalence
//unsigned.equivalence
Equivalence<about>))
(def (info_writer writer)
(All (_ about)
(-> (Writer about)
(Writer (Info about))))
(function (_ [name length info])
(let [[nameS nameT] (//index.writer name)
[lengthS lengthT] (//unsigned.writer/4 length)
[infoS infoT] (writer info)]
[(all n.+ nameS lengthS infoS)
(|>> nameT lengthT infoT)])))
(with_expansions [<Code> (these (/code.Code Attribute))]
(type: .public Attribute
(Rec Attribute
(Variant
{#Constant (Info (Constant Any))}
{#Code (Info <Code>)}
{#Signature (Info (Index UTF8))})))
(type: .public Code
<Code>)
)
(def .public equivalence
(Equivalence Attribute)
(equivalence.rec
(function (_ equivalence)
(all sum.equivalence
(info_equivalence /constant.equivalence)
(info_equivalence (/code.equivalence equivalence))
(info_equivalence //index.equivalence)
))))
(def common_attribute_length
(all n.+
... u2 attribute_name_index;
//unsigned.bytes/2
... u4 attribute_length;
//unsigned.bytes/4
))
(def (length attribute)
(-> Attribute Nat)
(case attribute
(^.with_template [<tag>]
[{<tag> [name length info]}
(|> length //unsigned.value (n.+ ..common_attribute_length))])
([#Constant]
[#Code]
[#Signature])))
... TODO: Inline ASAP
(def (constant' index @name)
(-> (Constant Any) (Index UTF8) Attribute)
{#Constant [#name @name
... https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.2
#length (|> /constant.length //unsigned.u4 try.trusted)
#info index]})
(def .public (constant index)
(-> (Constant Any) (Resource Attribute))
(//pool#each (constant' index) (//pool.utf8 "ConstantValue")))
... TODO: Inline ASAP
(def (code' specification @name)
(-> Code (Index UTF8) Attribute)
{#Code [#name @name
... https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3
#length (|> specification
(/code.length ..length)
//unsigned.u4
try.trusted)
#info specification]})
(def .public (code specification)
(-> Code (Resource Attribute))
(//pool#each (code' specification) (//pool.utf8 "Code")))
... TODO: Inline ASAP
(def (signature' it @name)
(-> (Index UTF8) (Index UTF8) Attribute)
{#Signature [#name @name
... https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.9
#length (|> //index.length //unsigned.u4 try.trusted)
#info it]})
(def .public (signature it)
(All (_ category)
(-> (Signature category) (Resource Attribute)))
(do [! //pool.monad]
[it (|> it //signature.signature //pool.utf8)]
(at ! each (signature' it) (//pool.utf8 "Signature"))))
(def .public (writer it)
(Writer Attribute)
(case it
{#Constant it}
((info_writer /constant.writer) it)
{#Code it}
((info_writer (/code.writer writer)) it)
{#Signature it}
((info_writer //index.writer) it)))
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