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|
(.require
[library
[lux (.except let local symbol macro)
[abstract
["[0]" monad (.only do)]]
[control
["<>" parser (.use "[1]#[0]" functor)]
["[0]" try (.only Try)]
["[0]" exception (.only Exception)]]
[data
["[0]" bit (.use "[1]#[0]" codec)]
["[0]" text]
[collection
["[0]" list (.use "[1]#[0]" monad)]
["[0]" dictionary (.only Dictionary)]]]
[math
[number
["[0]" nat (.use "[1]#[0]" decimal)]
["[0]" int (.use "[1]#[0]" decimal)]
["[0]" rev (.use "[1]#[0]" decimal)]
["[0]" frac (.use "[1]#[0]" decimal)]]]
["[0]" meta (.only)
["[0]" code (.only)
["<[1]>" \\parser (.only Parser)]]]]]
["[0]" // (.only)
[syntax (.only syntax)]
["^" pattern]
["[0]" local]])
(def .public spliced
(syntax (_ [parts (<code>.tuple (<>.some <code>.any))])
(in parts)))
(def .public amount
(syntax (_ [parts (<code>.tuple (<>.some <code>.any))])
(in (list (code.nat (list.size parts))))))
(def .public with_locals
(syntax (_ [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?
(when 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?))))
(def .public text
(syntax (_ [simple (..part false)])
(in (list (|> simple (text.interposed "") code.text)))))
(with_template [<name> <simple> <complex>]
[(def .public <name>
(syntax (_ [name (<>.or (<>.and (..part true) (..part false))
(..part false))])
(when 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)
(when template
[_ {.#Symbol "" name}]
(when (dictionary.value name env)
{.#Some substitute}
substitute
{.#None}
template)
(^.with_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.def .public (irregular_arguments [expected actual])
(Exception [Nat Nat])
(exception.report
(list ["Expected" (of nat.decimal encoded expected)]
["Actual" (of nat.decimal encoded actual)])))
(def (macro (open "_[0]"))
(-> Local Macro)
(//.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])))
... TODO: Get rid of this (and any local definitions it depends on) once the bootstrapping compiler is gone.
(def .public let
(syntax (_ [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 (when (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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