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|
(.module:
[lux (#- type)
[abstract
["." monad (#+ do)]]
[control
["." exception (#+ exception:)]]
[data
["." text
["%" format (#+ format)]]
[collection
[array (#+ Array)]
["." dictionary (#+ Dictionary)]]]
[type
abstract
["." check (#+ Check) ("#@." monad)]]]
["." //
["#." reflection]
["/#" // #_
[encoding
["#." name]]]])
(template [<name>]
[(abstract: #export (<name> class) {} Any)]
[Lower] [Upper]
)
(type: #export Mapping
(Dictionary //.Var Type))
(def: #export fresh
Mapping
(dictionary.new text.hash))
(exception: #export (unknown-var {var //.Var})
(exception.report
["Var" (%.text var)]))
(def: (generic mapping input)
(-> Mapping //.Generic (Check Type))
(case input
(#//.Var var)
(case (dictionary.get var mapping)
#.None
(check.throw ..unknown-var var)
(#.Some type)
(check@wrap type))
(#//.Wildcard wildcard)
(case wildcard
#.None
(do check.monad
[[id type] check.existential]
(wrap type))
(#.Some [bound limit])
(do check.monad
[limitT (generic mapping limit)]
(case bound
(^template [<tag> <ctor> <limit>]
<tag>
## TODO: Re-enable Lower and Upper, instead of using the
## simplified limit.
## (wrap (.type (<ctor> limitT)))
(wrap <limit>))
([#//.Lower ..Lower (primitive "java.lang.Object")]
[#//.Upper ..Upper limitT]))))
(#//.Class name parameters)
(do check.monad
[parametersT+ (monad.map @ (generic mapping) parameters)]
(wrap (#.Primitive name parametersT+)))))
(def: #export (class mapping [name parameters])
(-> Mapping //.Class (Check Type))
(do check.monad
[parametersT+ (monad.map @ (..generic mapping) parameters)]
(wrap (#.Primitive name parametersT+))))
(def: #export (type mapping input)
(-> Mapping //.Type (Check Type))
(case input
(#//.Primitive primitive)
(check@wrap (case primitive
#//.Boolean (#.Primitive //reflection.boolean #.Nil)
#//.Byte (#.Primitive //reflection.byte #.Nil)
#//.Short (#.Primitive //reflection.short #.Nil)
#//.Int (#.Primitive //reflection.int #.Nil)
#//.Long (#.Primitive //reflection.long #.Nil)
#//.Float (#.Primitive //reflection.float #.Nil)
#//.Double (#.Primitive //reflection.double #.Nil)
#//.Char (#.Primitive //reflection.char #.Nil)))
(#//.Generic generic)
(..generic mapping generic)
(#//.Array elementT)
(case elementT
(#//.Primitive primitive)
(check@wrap (#.Primitive (|> input //reflection.class ///name.internal ///name.read) #.Nil))
_
(:: check.monad map
(|>> Array .type)
(type mapping elementT)))))
(def: #export (return mapping input)
(-> Mapping (Maybe //.Type) (Check Type))
(case input
#.None
(check@wrap Any)
(#.Some input)
(..type mapping input)))
|
