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(.require
[library
[lux (.except def global)
[abstract
[monad (.only do)]]
[control
["?" parser]
["[0]" exception (.only Exception)]
["[0]" maybe]
[function
[predicate (.only Predicate)]]]
[data
["[0]" text (.use "[1]#[0]" equivalence monoid)]
[collection
["[0]" list (.only)
["[0]" property]]]]
["[0]" meta (.only)
["[0]" symbol (.use "[1]#[0]" codec)]
["[0]" code (.only)
["?[1]" \\parser]]]]]
["[0]" // (.only)
[syntax (.only syntax)]])
(type .public Stack
List)
(exception.def (no_definition it)
(Exception Symbol)
(exception.report
(list ["Definition" (symbol#encoded it)])))
(.def (global it)
(-> Symbol (Meta Any))
(do meta.monad
[.let [[@ expected_name] it]
defs (meta.definitions @)]
(when (list.one (function (_ [actual_name [exported? type value]])
(if (text#= expected_name actual_name)
{.#Some value}
{.#None}))
defs)
{.#Some it}
(in it)
{.#None}
(meta.failure (exception.error ..no_definition [it])))))
(exception.def .public no_active_context)
(.def .public (peek' _ context)
(All (_ a) (-> (Stack a) Symbol (Meta a)))
(do meta.monad
[stack (..global context)]
(when (|> stack
(as (Stack Any))
list.head)
{.#Some top}
(in (as_expected top))
{.#None}
(meta.failure (exception.error ..no_active_context [])))))
(.def .public peek
(syntax (_ [g!it (at ?.monad each code.symbol ?code.global)])
(in (list (` (..peek' (, g!it) (.symbol (, g!it))))))))
(exception.def .public no_example)
(.def .public (search' ? _ context)
(All (_ a) (-> (Predicate a) (Stack a) Symbol (Meta a)))
(do meta.monad
[stack (..global context)]
(when (|> stack
(as (Stack Any))
(list.example (as (Predicate Any) ?)))
{.#Some it}
(in (as_expected it))
{.#None}
(meta.failure (exception.error ..no_example [])))))
(.def .public search
(syntax (_ [g!? ?code.any
g!context (at ?.monad each code.symbol ?code.global)])
(in (list (` (..search' (, g!?) (, g!context) (.symbol (, g!context))))))))
(.def (alter on_definition [@ context])
(-> (-> Definition Definition) Symbol (Meta Any))
(function (_ lux)
(let [on_global (is (-> Global Global)
(function (_ it)
(when it
{.#Definition it}
{.#Definition (on_definition it)}
_
it)))
on_globals (is (-> (property.List Global) (property.List Global))
(property.revised context on_global))
on_module (is (-> Module Module)
(revised .#definitions on_globals))]
{.#Right [(revised .#modules (property.revised @ on_module) lux)
[]]})))
(.def .public (push' top _)
(All (_ a) (-> a (Stack a) Symbol (Meta Any)))
(alter (function (_ [exported? type stack])
(|> stack
(as (Stack Any))
{.#Item top}
(is (Stack Any))
[exported? type]))))
(.def .public push
(syntax (_ [g!it ?code.any
g!context (at ?.monad each code.symbol ?code.global)])
(in (list (` (..push' (, g!it) (, g!context) (.symbol (, g!context))))))))
(.def .public pop''
(-> Symbol (Meta Any))
(alter (function (_ [exported? type value])
[exported? type (let [value (as (Stack Any) value)]
(maybe.else value (list.tail value)))])))
(.def .public pop'
(syntax (_ [expression? ?code.bit
context ?code.global])
(do meta.monad
[_ (..pop'' context)]
(in (if expression?
(list (' []))
(list))))))
(.def .public pop
(syntax (_ [g!context (at ?.monad each code.symbol ?code.global)])
(in (list (` (..pop'' (.symbol (, g!context))))))))
(.def .public def
(syntax (_ [.let [! ?.monad
?local (at ! each code.local ?code.local)]
[$ g!expression g!declaration] (?code.tuple (all ?.and ?code.local ?local ?local))
context_type ?code.any])
(do [! meta.monad]
[@ meta.current_module_name
.let [g!context (code.symbol [@ $])]]
(//.with_symbols [g!it g!body g!_]
(in (list (` (.def (, (code.local $))
(..Stack (, context_type))
(list)))
(` (.def ((, g!expression) (, g!it) (, g!body))
(-> (, context_type) Code (Meta Code))
(do meta.monad
[(, g!_) (..push (, g!it) (, g!context))]
((,' in) (` (let [((,' ,') (, g!body)) ((,' ,) (, g!body))
((,' ,') (, g!_)) (..pop' #1 (, g!context))]
((,' ,') (, g!body))))))))
(` (.def ((, g!declaration) (, g!it) (, g!body))
(-> (, context_type) Code (Meta (List Code)))
(do meta.monad
[(, g!_) (..push (, g!it) (, g!context))]
((,' in) (list (, g!body)
(` (..pop' #0 (, g!context))))))))
))))))
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