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|
(.module:
lux
(lux (control [monad #+ do Monad]
["p" parser "p/" Monad<Parser>]
[eq #+ Eq]
[order #+ Order]
[enum #+ Enum])
(data text/format
(number ["r" ratio]))
[macro]
(macro [code]
["s" syntax #+ syntax:]
(syntax ["cs" common]
(common ["csr" reader]
["csw" writer])))
(type abstract)))
(abstract: #export (Qty unit)
{}
Int
(def: #export in
(All [unit] (-> Int (Qty unit)))
(|>> @abstract))
(def: #export out
(All [unit] (-> (Qty unit) Int))
(|>> @repr)))
(sig: #export (Scale s)
(: (All [u] (-> (Qty u) (Qty (s u))))
scale)
(: (All [u] (-> (Qty (s u)) (Qty u)))
de-scale)
(: r.Ratio
ratio))
(type: #export Pure
(Qty []))
(type: #export (Per d n)
(-> d n))
(type: #export (Inverse u)
(|> Pure (Per u)))
(type: #export (Product p s)
(|> s (Per (Inverse p))))
(def: #export pure
(-> Int Pure)
in)
(do-template [<name> <tag>]
[(def: <name>
(-> Text Text)
(|>> (format "{" kind "@" module "}")
(let [[module kind] (ident-for <tag>)])))]
[unit-name #..Unit]
[scale-name #..Scale]
)
(syntax: #export (unit: [export csr.export]
[name s.local-symbol]
[annotations (p.default cs.empty-annotations csr.annotations)])
(wrap (list (` (type: (~+ (csw.export export)) (~ (code.local-symbol name))
(~ (csw.annotations annotations))
(primitive (~ (code.text (unit-name name))))))
(` (def: (~+ (csw.export export)) (~ (code.local-symbol (format "@" name)))
(~ (code.local-symbol name))
(:!! [])))
)))
(def: ratio^
(s.Syntax r.Ratio)
(s.tuple (do p.Monad<Parser>
[numerator s.int
_ (p.assert (format "Numerator must be positive: " (%i numerator))
(i/> 0 numerator))
denominator s.int
_ (p.assert (format "Denominator must be positive: " (%i denominator))
(i/> 0 denominator))]
(wrap [(int-to-nat numerator) (int-to-nat denominator)]))))
(syntax: #export (scale: [export csr.export]
[name s.local-symbol]
[(^slots [#r.numerator #r.denominator]) ratio^]
[annotations (p.default cs.empty-annotations csr.annotations)])
(let [g!scale (code.local-symbol name)]
(wrap (list (` (type: (~+ (csw.export export)) ((~ g!scale) (~' u))
(~ (csw.annotations annotations))
(primitive (~ (code.text (scale-name name))) [(~' u)])))
(` (struct: (~+ (csw.export export)) (~ (code.local-symbol (format "@" name)))
(..Scale (~ g!scale))
(def: (~' scale)
(|>> ..out
(i/* (~ (code.int (nat-to-int numerator))))
(i// (~ (code.int (nat-to-int denominator))))
..in))
(def: (~' de-scale)
(|>> ..out
(i/* (~ (code.int (nat-to-int denominator))))
(i// (~ (code.int (nat-to-int numerator))))
..in))
(def: (~' ratio)
[(~ (code.nat numerator)) (~ (code.nat denominator))])))
))))
(do-template [<name> <op>]
[(def: #export (<name> param subject)
(All [unit] (-> (Qty unit) (Qty unit) (Qty unit)))
(|> subject out (<op> (out param)) in))]
[u/+ i/+]
[u/- i/-]
)
(def: #export (u// param subject)
(All [p s] (-> (Qty p) (Qty s) (|> (Qty s) (Per (Qty p)))))
(function [input]
(|> (out subject)
(i/* (out input))
(i// (out param))
in)))
(def: #export (u/* param subject)
(All [p s] (-> (Qty p) (Qty s) (Product (Qty p) (Qty s))))
(function [input]
(|> subject
out
(i/* (out (input param)))
in)))
(def: #export (re-scale from to quantity)
(All [si so u] (-> (Scale si) (Scale so) (Qty (si u)) (Qty (so u))))
(let [[numerator denominator] (|> (:: to ratio) (r.r// (:: from ratio)))]
(|> quantity
out
(i/* (nat-to-int numerator))
(i// (nat-to-int denominator))
in)))
(scale: #export Kilo [1 1_000])
(scale: #export Mega [1 1_000_000])
(scale: #export Giga [1 1_000_000_000])
(scale: #export Milli [ 1_000 1])
(scale: #export Micro [ 1_000_000 1])
(scale: #export Nano [1_000_000_000 1])
(unit: #export Gram)
(unit: #export Meter)
(unit: #export Litre)
(unit: #export Second)
(struct: #export Eq<Unit> (All [unit] (Eq (Qty unit)))
(def: (= reference sample)
(i/= (out reference) (out sample))))
(struct: #export Order<Unit> (All [unit] (Order (Qty unit)))
(def: eq Eq<Unit>)
(do-template [<name> <func>]
[(def: (<name> reference sample)
(<func> (out reference) (out sample)))]
[< i/<]
[<= i/<=]
[> i/>]
[>= i/>=]))
(struct: #export Enum<Unit> (All [unit] (Enum (Qty unit)))
(def: order Order<Unit>)
(def: succ (|>> ..out i/inc ..in))
(def: pred (|>> ..out i/dec ..in)))
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