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(.module:
[lux #*
[abstract
["." monad (#+ do)]]
[control
[io (#+ IO)]
["." try]
["." exception (#+ exception:)]
["<>" parser
["<c>" code (#+ Parser)]]]
[data
["." maybe]
["." text
["%" format (#+ format)]]
[collection
["." list ("#@." functor)]
["." dictionary (#+ Dictionary)]]]
[type
["." check]]
["." macro]]
["." ///
["#." bundle]
["#/" //
[analysis
[".A" type]
[".A" case]
[".A" function]]
["#/" //
[default
[evaluation (#+ Eval)]]
["#." analysis (#+ Analysis Operation Phase Handler Bundle)]]]])
(def: #export (custom [syntax handler])
(All [s]
(-> [(Parser s)
(-> Text Phase s (Operation Analysis))]
Handler))
(function (_ extension-name analyse args)
(case (<c>.run syntax args)
(#try.Success inputs)
(handler extension-name analyse inputs)
(#try.Failure _)
(/////analysis.throw ///.invalid-syntax [extension-name %.code args]))))
(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)))
(/////analysis.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))
## TODO: Get rid of this ASAP
(as-is
(exception: #export (char-text-must-be-size-1 {text Text})
(exception.report
["Text" (%.text text)]))
(def: text-char
(Parser text.Char)
(do <>.monad
[raw <c>.text]
(case (text.size raw)
1 (wrap (|> raw (text.nth 0) maybe.assume))
_ (<>.fail (exception.construct ..char-text-must-be-size-1 [raw])))))
(def: lux::syntax-char-case!
(..custom
[($_ <>.and
<c>.any
(<c>.tuple (<>.some (<>.and (<c>.tuple (<>.many ..text-char))
<c>.any)))
<c>.any)
(function (_ extension-name phase [input conditionals else])
(do ////.monad
[input (typeA.with-type text.Char
(phase input))
expectedT (///.lift macro.expected-type)
conditionals (monad.map @ (function (_ [cases branch])
(do @
[branch (typeA.with-type expectedT
(phase branch))]
(wrap [cases branch])))
conditionals)
else (typeA.with-type expectedT
(phase else))]
(wrap (|> conditionals
(list@map (function (_ [cases branch])
(/////analysis.tuple
(list (/////analysis.tuple (list@map (|>> /////analysis.nat) cases))
branch))))
(list& input else)
(#/////analysis.Extension extension-name)))))])))
## "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))))
_
(/////analysis.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))
_
(/////analysis.throw ///.invalid-syntax [extension-name %.code argsC+]))))
(def: (lux::check 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 actualT
(analyse valueC)))
_
(/////analysis.throw ///.incorrect-arity [extension-name 2 (list.size args)]))))
(def: (lux::coerce 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)
[valueT valueA] (typeA.with-inference
(analyse valueC))]
(wrap valueA))
_
(/////analysis.throw ///.incorrect-arity [extension-name 2 (list.size args)]))))
(def: (caster input output)
(-> Type Type Handler)
(function (_ extension-name analyse args)
(case args
(^ (list valueC))
(do ////.monad
[_ (typeA.infer output)]
(typeA.with-type input
(analyse valueC)))
_
(/////analysis.throw ///.incorrect-arity [extension-name 1 (list.size args)]))))
(def: (bundle::lux eval)
(-> Eval Bundle)
(|> ///bundle.empty
(///bundle.install "syntax char case!" lux::syntax-char-case!)
(///bundle.install "is" lux::is)
(///bundle.install "try" lux::try)
(///bundle.install "check" (lux::check eval))
(///bundle.install "coerce" (lux::coerce eval))
(///bundle.install "macro" (..caster .Macro' .Macro))
(///bundle.install "check type" (..caster .Type .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* Bit))
(///bundle.install "<" (binary Int Int Bit))
(///bundle.install "+" (binary I64* I64* I64))
(///bundle.install "-" (binary I64* I64* I64))
(///bundle.install "*" (binary Int Int Int))
(///bundle.install "/" (binary Int Int Int))
(///bundle.install "%" (binary Int Int Int))
(///bundle.install "f64" (unary Int Frac))
(///bundle.install "char" (unary Int Text)))))
(def: bundle::f64
Bundle
(<| (///bundle.prefix "f64")
(|> ///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 "i64" (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 Nat Text Text (type (Maybe Nat))))
(///bundle.install "size" (unary Text Nat))
(///bundle.install "char" (binary Nat Text Nat))
(///bundle.install "clip" (trinary Nat Nat Text Text))
)))
(def: #export (bundle eval)
(-> Eval Bundle)
(<| (///bundle.prefix "lux")
(|> ///bundle.empty
(dictionary.merge (bundle::lux eval))
(dictionary.merge bundle::i64)
(dictionary.merge bundle::f64)
(dictionary.merge bundle::text)
(dictionary.merge bundle::io)
)))
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