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(.require
[library
[lux (.except)
[abstract
[monad (.only do)]]
[control
["<>" parser (.use "[1]#[0]" functor)
["<[0]>" code (.only Parser)]]]
[data
["[0]" product]
[collection
["[0]" list (.use "[1]#[0]" mix)]]]
[macro
[syntax (.only syntax)]
["[0]" code]]
[math
[number
["n" nat]
["i" int]]]]])
(type: Infix
(Rec Infix
(Variant
{#Const Code}
{#Call (List Code)}
{#Unary Code Infix}
{#Binary Infix Code Infix})))
(def literal
(Parser Code)
(all <>.either
(<>#each code.bit <code>.bit)
(<>#each code.nat <code>.nat)
(<>#each code.int <code>.int)
(<>#each code.rev <code>.rev)
(<>#each code.frac <code>.frac)
(<>#each code.text <code>.text)
(<>#each code.symbol <code>.symbol)))
(def expression
(Parser Infix)
(<| <>.rec (function (_ expression))
(all <>.or
..literal
(<code>.form (<>.many <code>.any))
(<code>.tuple (<>.and <code>.any expression))
(<code>.tuple (do <>.monad
[init_subject expression
init_op <code>.any
init_param expression
steps (<>.some (<>.and <code>.any expression))]
(in (list#mix (function (_ [op param] [_subject _op _param])
[{#Binary _subject _op _param} op param])
[init_subject init_op init_param]
steps))))
)))
(def (prefix infix)
(-> Infix Code)
(case infix
{#Const value}
value
{#Call parts}
(code.form parts)
{#Unary op subject}
(` ((~ op) (~ (prefix subject))))
{#Binary left op right}
(` ((~ op) (~ (prefix right)) (~ (prefix left))))))
(def .public infix
(syntax (_ [expr ..expression])
(in (list (..prefix expr)))))
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