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|
(.require
[library
[lux (.except with let)
[abstract
["[0]" monad (.only do)]]
[control
["<>" parser]
["[0]" try (.only Try)]
["[0]" exception (.only Exception)]]
[data
["[0]" product]
["[0]" text]
[collection
["[0]" list (.use "[1]#[0]" functor)
["[0]" property]]]]
["[0]" meta (.only)
["[0]" code (.only)
["<[1]>" \\parser]]]]]
["[0]" // (.only)
[syntax (.only syntax)]])
(exception.def .public (unknown_module module)
(Exception Text)
(exception.report
(list ["Module" (text.format module)])))
(with_template [<name>]
[(exception.def .public (<name> [module definition])
(Exception [Text Text])
(exception.report
(list ["Module" (text.format module)]
["Definition" (text.format definition)])))]
[cannot_shadow_definition]
[unknown_definition]
)
(def (with_module name body)
(All (_ a) (-> Text (-> Module (Try [Module a])) (Meta a)))
(function (_ compiler)
(when (|> compiler (the .#modules) (property.value name))
{.#Some module}
(when (body module)
{try.#Success [module' output]}
{try.#Success [(revised .#modules (property.has name module') compiler)
output]}
{try.#Failure error}
{try.#Failure error})
{.#None}
(exception.except ..unknown_module [name]))))
(def (push_one [name macro])
(-> [Symbol Macro] (Meta Any))
(do meta.monad
[[module_name definition_name] (meta.normal name)
.let [definition (is Global {.#Definition [false .Macro macro]})
add_macro! (is (-> (property.List Global) (property.List Global))
(property.has definition_name definition))]]
(..with_module module_name
(function (_ module)
(when (|> module (the .#definitions) (property.value definition_name))
{.#None}
{try.#Success [(revised .#definitions add_macro! module)
[]]}
{.#Some _}
(exception.except ..cannot_shadow_definition [module_name definition_name]))))))
(def (pop_one name)
(-> Symbol (Meta Any))
(do meta.monad
[[module_name definition_name] (meta.normal name)
.let [lacks_macro! (is (-> (property.List Global) (property.List Global))
(property.lacks definition_name))]]
(..with_module module_name
(function (_ module)
(when (|> module (the .#definitions) (property.value definition_name))
{.#Some _}
{try.#Success [(revised .#definitions lacks_macro! module)
[]]}
{.#None}
(exception.except ..unknown_definition [module_name definition_name]))))))
(def (pop_all macros self)
(-> (List Symbol) Symbol Macro)
(//.macro
(function (_ _)
(do [! meta.monad]
[_ (monad.each ! ..pop_one macros)
_ (..pop_one self)
compiler meta.compiler_state]
(in (when (the .#expected compiler)
{.#Some _}
(list (' []))
{.#None}
(list)))))))
(def .public (push macros)
(-> (List [Symbol Macro]) (Meta Code))
(do meta.monad
[_ (monad.each meta.monad ..push_one macros)
seed meta.seed
g!pop (//.symbol "pop")
_ (.let [g!pop (is Symbol
["" (code.format g!pop)])]
(..push_one [g!pop (..pop_all (list#each product.left macros) g!pop)]))]
(in (` ((, g!pop))))))
(def .public (with macros expression? body)
(-> (List [Symbol Macro]) Bit Code (Meta (List Code)))
(do [! meta.monad]
[g!pop (..push macros)]
(.if expression?
(//.with_symbols [g!body]
(in (list (` (.let [(, g!body) (, body)]
(exec
(, g!pop)
(, g!body)))))))
(in (list body
g!pop)))))
(def .public let
(syntax (_ [locals (<code>.tuple (<>.some (<>.and <code>.local <code>.any)))
body <code>.any])
(do [! meta.monad]
[here_name meta.current_module_name
locals (monad.each ! (function (_ [name value])
(|> value
(meta.eval .Macro)
(at ! each (|>> (as .Macro)
[[here_name name]]))))
locals)
expression? (is (Meta Bit)
(function (_ lux)
{try.#Success [lux (when (the .#expected lux)
{.#None}
false
{.#Some _}
true)]}))]
(..with locals expression? body))))
|
