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|
(.module:
[lux #*
[control
["." monad (#+ do)]]
[data
["." text
format]
[collection
["." list ("#;." functor)]
["." dictionary (#+ Dictionary)]]]
[type
["." check]]
["." macro]
[io (#+ IO)]]
["." ///
["#." bundle]
["#/" //
[analysis
[".A" type]
[".A" case]
[".A" function]]
["#/" //
[default
[evaluation (#+ Eval)]]
["#." analysis (#+ Analysis Handler Bundle)]]]])
## [Utils]
(def: (simple inputsT+ outputT)
(-> (List Type) Type Handler)
(let [num-expected (list.size inputsT+)]
(function (_ extension-name analyse args)
(let [num-actual (list.size args)]
(if (n/= num-expected num-actual)
(do ////.monad
[_ (typeA.infer outputT)
argsA (monad.map @
(function (_ [argT argC])
(typeA.with-type argT
(analyse argC)))
(list.zip2 inputsT+ args))]
(wrap (#/////analysis.Extension extension-name argsA)))
(////.throw ///.incorrect-arity [extension-name num-expected num-actual]))))))
(def: #export (nullary valueT)
(-> Type Handler)
(simple (list) valueT))
(def: #export (unary inputT outputT)
(-> Type Type Handler)
(simple (list inputT) outputT))
(def: #export (binary subjectT paramT outputT)
(-> Type Type Type Handler)
(simple (list subjectT paramT) outputT))
(def: #export (trinary subjectT param0T param1T outputT)
(-> Type Type Type Type Handler)
(simple (list subjectT param0T param1T) outputT))
## [Analysers]
## "lux is" represents reference/pointer equality.
(def: lux::is
Handler
(function (_ extension-name analyse args)
(do ////.monad
[[var-id varT] (typeA.with-env check.var)]
((binary varT varT Bit extension-name)
analyse args))))
## "lux try" provides a simple way to interact with the host platform's
## error-handling facilities.
(def: lux::try
Handler
(function (_ extension-name analyse args)
(case args
(^ (list opC))
(do ////.monad
[[var-id varT] (typeA.with-env check.var)
_ (typeA.infer (type (Either Text varT)))
opA (typeA.with-type (type (IO varT))
(analyse opC))]
(wrap (#/////analysis.Extension extension-name (list opA))))
_
(////.throw ///.incorrect-arity [extension-name 1 (list.size args)]))))
(def: lux::in-module
Handler
(function (_ extension-name analyse argsC+)
(case argsC+
(^ (list [_ (#.Text module-name)] exprC))
(/////analysis.with-current-module module-name
(analyse exprC))
_
(////.throw ///.invalid-syntax [extension-name]))))
(do-template [<name> <type>]
[(def: (<name> eval)
(-> Eval Handler)
(function (_ extension-name analyse args)
(case args
(^ (list typeC valueC))
(do ////.monad
[count (///.lift macro.count)
actualT (:: @ map (|>> (:coerce Type))
(eval count Type typeC))
_ (typeA.infer actualT)]
(typeA.with-type <type>
(analyse valueC)))
_
(////.throw ///.incorrect-arity [extension-name 2 (list.size args)]))))]
[lux::check actualT]
[lux::coerce Any]
)
(def: lux::check::type
Handler
(function (_ extension-name analyse args)
(case args
(^ (list valueC))
(do ////.monad
[_ (typeA.infer Type)
valueA (typeA.with-type Type
(analyse valueC))]
(wrap valueA))
_
(////.throw ///.incorrect-arity [extension-name 1 (list.size args)]))))
(def: (bundle::lux eval)
(-> Eval Bundle)
(|> ///bundle.empty
(///bundle.install "is" lux::is)
(///bundle.install "try" lux::try)
(///bundle.install "check" (lux::check eval))
(///bundle.install "coerce" (lux::coerce eval))
(///bundle.install "check type" lux::check::type)
(///bundle.install "in-module" lux::in-module)))
(def: bundle::io
Bundle
(<| (///bundle.prefix "io")
(|> ///bundle.empty
(///bundle.install "log" (unary Text Any))
(///bundle.install "error" (unary Text Nothing))
(///bundle.install "exit" (unary Int Nothing))
(///bundle.install "current-time" (nullary Int)))))
(def: I64* (type (I64 Any)))
(def: bundle::i64
Bundle
(<| (///bundle.prefix "i64")
(|> ///bundle.empty
(///bundle.install "and" (binary I64* I64* I64))
(///bundle.install "or" (binary I64* I64* I64))
(///bundle.install "xor" (binary I64* I64* I64))
(///bundle.install "left-shift" (binary Nat I64* I64))
(///bundle.install "logical-right-shift" (binary Nat I64* I64))
(///bundle.install "arithmetic-right-shift" (binary Nat I64* I64))
(///bundle.install "+" (binary I64* I64* I64))
(///bundle.install "-" (binary I64* I64* I64))
(///bundle.install "=" (binary I64* I64* Bit)))))
(def: bundle::int
Bundle
(<| (///bundle.prefix "int")
(|> ///bundle.empty
(///bundle.install "*" (binary Int Int Int))
(///bundle.install "/" (binary Int Int Int))
(///bundle.install "%" (binary Int Int Int))
(///bundle.install "<" (binary Int Int Bit))
(///bundle.install "frac" (unary Int Frac))
(///bundle.install "char" (unary Int Text)))))
(def: bundle::frac
Bundle
(<| (///bundle.prefix "frac")
(|> ///bundle.empty
(///bundle.install "+" (binary Frac Frac Frac))
(///bundle.install "-" (binary Frac Frac Frac))
(///bundle.install "*" (binary Frac Frac Frac))
(///bundle.install "/" (binary Frac Frac Frac))
(///bundle.install "%" (binary Frac Frac Frac))
(///bundle.install "=" (binary Frac Frac Bit))
(///bundle.install "<" (binary Frac Frac Bit))
(///bundle.install "smallest" (nullary Frac))
(///bundle.install "min" (nullary Frac))
(///bundle.install "max" (nullary Frac))
(///bundle.install "int" (unary Frac Int))
(///bundle.install "encode" (unary Frac Text))
(///bundle.install "decode" (unary Text (type (Maybe Frac)))))))
(def: bundle::text
Bundle
(<| (///bundle.prefix "text")
(|> ///bundle.empty
(///bundle.install "=" (binary Text Text Bit))
(///bundle.install "<" (binary Text Text Bit))
(///bundle.install "concat" (binary Text Text Text))
(///bundle.install "index" (trinary Text Text Nat (type (Maybe Nat))))
(///bundle.install "size" (unary Text Nat))
(///bundle.install "char" (binary Text Nat Nat))
(///bundle.install "clip" (trinary Text Nat Nat Text))
)))
(def: #export (bundle eval)
(-> Eval Bundle)
(<| (///bundle.prefix "lux")
(|> ///bundle.empty
(dictionary.merge (bundle::lux eval))
(dictionary.merge bundle::i64)
(dictionary.merge bundle::int)
(dictionary.merge bundle::frac)
(dictionary.merge bundle::text)
(dictionary.merge bundle::io)
)))
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