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(.using
[library
[lux (.except let local macro symbol)
["[0]" meta]
[abstract
["[0]" monad (.only do)]]
[control
["[0]" try (.only Try)]
["[0]" exception (.only exception:)]
["<>" parser ("[1]#[0]" functor)
["<[0]>" code (.only Parser)]]]
[data
["[0]" bit ("[1]#[0]" codec)]
["[0]" text]
[collection
["[0]" list ("[1]#[0]" monad)]
["[0]" dictionary (.only Dictionary)]]]
[macro
["^" pattern]]
[math
[number
["[0]" nat ("[1]#[0]" decimal)]
["[0]" int ("[1]#[0]" decimal)]
["[0]" rev ("[1]#[0]" decimal)]
["[0]" frac ("[1]#[0]" decimal)]]]]]
["[0]" // (.only)
[syntax (.only syntax:)]
["[0]" code]
["[0]" local]])
(syntax: .public (spliced [parts (<code>.tuple (<>.some <code>.any))])
(in parts))
(syntax: .public (amount [parts (<code>.tuple (<>.some <code>.any))])
(in (list (code.nat (list.size parts)))))
(syntax: .public (with_locals [locals (<code>.tuple (<>.some <code>.local))
body <code>.any])
(do [! meta.monad]
[g!locals (|> locals
(list#each //.symbol)
(monad.all !))]
(in (list (` (.with_expansions [(~+ (|> (list.zipped_2 locals g!locals)
(list#each (function (_ [name symbol])
(list (code.local name) symbol)))
list#conjoint))]
(~ body)))))))
(def: (symbol_side module_side? parser)
(-> Bit (Parser Symbol) (Parser Text))
(do <>.monad
[[module short] parser]
(in (if module_side?
(case module
"" short
_ module)
short))))
(def: (snippet module_side?)
(-> Bit (Parser Text))
(.let [full_symbol (..symbol_side module_side? <code>.symbol)]
(all <>.either
<code>.text
(if module_side?
full_symbol
(<>.either <code>.local
full_symbol))
(<>#each bit#encoded <code>.bit)
(<>#each nat#encoded <code>.nat)
(<>#each int#encoded <code>.int)
(<>#each rev#encoded <code>.rev)
(<>#each frac#encoded <code>.frac)
)))
(def: (part module_side?)
(-> Bit (Parser (List Text)))
(<code>.tuple (<>.many (..snippet module_side?))))
(syntax: .public (text [simple (..part false)])
(in (list (|> simple (text.interposed "") code.text))))
(template [<name> <simple> <complex>]
[(syntax: .public (<name> [name (<>.or (<>.and (..part true) (..part false))
(..part false))])
(case name
{.#Left [simple complex]}
(in (list (<complex> [(text.interposed "" simple)
(text.interposed "" complex)])))
{.#Right simple}
(in (list (|> simple (text.interposed "") <simple>)))))]
[symbol code.local code.symbol]
)
(type: Environment
(Dictionary Text Code))
(def: (applied env template)
(-> Environment Code Code)
(case template
[_ {.#Symbol "" name}]
(case (dictionary.value name env)
{.#Some substitute}
substitute
{.#None}
template)
(^.template [<tag>]
[[meta {<tag> elems}]
[meta {<tag> (list#each (applied env) elems)}]])
([.#Form]
[.#Variant]
[.#Tuple])
_
template))
(type: Local
(Record
[#name Text
#parameters (List Text)
#template (List Code)]))
(exception: .public (irregular_arguments [expected Nat
actual Nat])
(exception.report
"Expected" (# nat.decimal encoded expected)
"Actual" (# nat.decimal encoded actual)))
(def: (macro (open "_[0]"))
(-> Local Macro)
("lux macro"
(function (_ inputs compiler)
(.let [parameters_amount (list.size _#parameters)
inputs_amount (list.size inputs)]
(if (nat.= parameters_amount inputs_amount)
(.let [environment (is Environment
(|> (list.zipped_2 _#parameters inputs)
(dictionary.of_list text.hash)))]
{.#Right [compiler (list#each (..applied environment) _#template)]})
(exception.except ..irregular_arguments [parameters_amount inputs_amount]))))))
(def: local
(Parser Local)
(do <>.monad
[[name parameters] (<code>.form (<>.and <code>.local
(<>.many <code>.local)))
template (<code>.tuple (<>.some <code>.any))]
(in [#name name
#parameters parameters
#template template])))
(syntax: .public (let [locals (<code>.tuple (<>.some ..local))
body <code>.any])
(do meta.monad
[here_name meta.current_module_name
expression? (is (Meta Bit)
(function (_ lux)
{try.#Success [lux (case (the .#expected lux)
{.#None}
false
{.#Some _}
true)]}))
g!pop (local.push (list#each (function (_ local)
[[here_name (the #name local)]
(..macro local)])
locals))]
(if expression?
(//.with_symbols [g!body]
(in (list (` (.let [(~ g!body) (~ body)]
(exec (~ g!pop)
(~ g!body)))))))
(in (list body
g!pop)))))
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