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|
(.require
[library
[lux (.except nat int rev)
[abstract
[equivalence (.only Equivalence)]]
[data
[text
["%" \\format]]]
[math
[number
["n" nat]]]]]
["[0]" //
["[1][0]" simple (.only Simple)]
["[1][0]" complex (.only Complex)]
[////
[reference
["[1][0]" variable (.only Register)]]]])
(type: .public Pattern
(Rec Pattern
(.Variant
{#Simple Simple}
{#Complex (Complex Pattern)}
{#Bind Register})))
(def .public equivalence
(Equivalence Pattern)
(implementation
(def (= reference sample)
(case [reference sample]
[{#Simple reference} {#Simple sample}]
(at //simple.equivalence = reference sample)
[{#Complex reference} {#Complex sample}]
(at (//complex.equivalence =) = reference sample)
[{#Bind reference} {#Bind sample}]
(n.= reference sample)
_
false))))
(def .public (format it)
(%.Format Pattern)
(case it
{#Simple it}
(//simple.format it)
{#Complex it}
(//complex.format format it)
{#Bind it}
(//variable.format {//variable.#Local it})))
(with_template [<name> <tag>]
[(def .public <name>
(template (<name> content)
[(.<| {..#Complex}
<tag>
content)]))]
[variant {//complex.#Variant}]
[tuple {//complex.#Tuple}]
)
(def .public unit
(template (unit)
[{..#Simple {//simple.#Unit}}]))
(with_template [<name> <tag>]
[(def .public <name>
(template (<name> content)
[{..#Simple {<tag> content}}]))]
[bit //simple.#Bit]
[nat //simple.#Nat]
[int //simple.#Int]
[rev //simple.#Rev]
[frac //simple.#Frac]
[text //simple.#Text]
)
(def .public bind
(template (bind register)
[{..#Bind register}]))
|
