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(.module:
[lux #*
[control
[monad (#+ Monad do)]
["ex" exception (#+ exception:)]]
[data
["." error (#+ Error)]
["." text ("#/." equivalence)
format]]
[type (#+ :share)
["." check]]
[compiler
["." phase
["." analysis
["." module]
["." type]]
["." translation]
["." statement (#+ State+ Operation)
["." total]]
["." extension]]
["." default
["." syntax]
["." platform (#+ Platform)]
["." init]]
["." cli (#+ Configuration)]]
[world
["." file (#+ File)]
["." console (#+ Console)]]]
["." /type])
(exception: #export (error {message Text})
message)
(def: #export module "<INTERPRETER>")
(def: fresh-source Source [[..module 1 0] 0 ""])
(def: (add-line line [where offset input])
(-> Text Source Source)
[where offset (format input text.new-line line)])
(def: exit-command Text "exit")
(def: welcome-message
Text
(format text.new-line
"Welcome to the interpreter!" text.new-line
"Type '" ..exit-command "' to leave." text.new-line
text.new-line))
(def: farewell-message
Text
"Till next time...")
(def: enter-module
(All [anchor expression statement]
(Operation anchor expression statement Any))
(statement.lift-analysis
(do phase.monad
[_ (module.create 0 ..module)]
(analysis.set-current-module ..module))))
(def: (initialize Monad<!> Console<!> platform configuration translation-bundle)
(All [! anchor expression statement]
(-> (Monad !)
(Console !) (Platform ! anchor expression statement)
Configuration
(translation.Bundle anchor expression statement)
(! (State+ anchor expression statement))))
(do Monad<!>
[state (platform.initialize platform translation-bundle)
state (platform.compile platform
(set@ #cli.module syntax.prelude configuration)
(set@ [#extension.state
#statement.analysis #statement.state
#extension.state
#.info #.mode]
#.Interpreter
state))
[state _] (:: (get@ #platform.file-system platform)
lift (phase.run' state enter-module))
_ (:: Console<!> write ..welcome-message)]
(wrap state)))
(with-expansions [<Interpretation> (as-is (Operation anchor expression statement [Type Any]))]
(def: (interpret-statement code)
(All [anchor expression statement]
(-> Code <Interpretation>))
(do phase.monad
[_ (total.phase code)
_ init.refresh]
(wrap [Any []])))
(def: (interpret-expression code)
(All [anchor expression statement]
(-> Code <Interpretation>))
(do phase.monad
[state (extension.lift phase.get-state)
#let [analyse (get@ [#statement.analysis #statement.phase] state)
synthesize (get@ [#statement.synthesis #statement.phase] state)
translate (get@ [#statement.translation #statement.phase] state)]
[_ codeT codeA] (statement.lift-analysis
(analysis.with-scope
(type.with-fresh-env
(do @
[[codeT codeA] (type.with-inference
(analyse code))
codeT (type.with-env
(check.clean codeT))]
(wrap [codeT codeA])))))
codeS (statement.lift-synthesis
(synthesize codeA))]
(statement.lift-translation
(translation.with-buffer
(do @
[codeH (translate codeS)
count translation.next
codeV (translation.evaluate! (format "interpretation_" (%n count)) codeH)]
(wrap [codeT codeV]))))))
(def: (interpret configuration code)
(All [anchor expression statement]
(-> Configuration Code <Interpretation>))
(function (_ state)
(case (<| (phase.run' state)
(:share [anchor expression statement]
{(State+ anchor expression statement)
state}
{<Interpretation>
(interpret-statement code)}))
(#error.Success [state' output])
(#error.Success [state' output])
(#error.Failure error)
(if (ex.match? total.not-a-statement error)
(<| (phase.run' state)
(:share [anchor expression statement]
{(State+ anchor expression statement)
state}
{<Interpretation>
(interpret-expression code)}))
(#error.Failure error)))))
)
(def: (execute configuration code)
(All [anchor expression statement]
(-> Configuration Code (Operation anchor expression statement Text)))
(do phase.monad
[[codeT codeV] (interpret configuration code)
state phase.get-state]
(wrap (/type.represent (get@ [#extension.state
#statement.analysis #statement.state
#extension.state]
state)
codeT
codeV))))
(type: (Context anchor expression statement)
{#configuration Configuration
#state (State+ anchor expression statement)
#source Source})
(with-expansions [<Context> (as-is (Context anchor expression statement))]
(def: (read-eval-print context)
(All [anchor expression statement]
(-> <Context> (Error [<Context> Text])))
(do error.monad
[#let [[_where _offset _code] (get@ #source context)]
[source' input] (syntax.parse ..module syntax.no-aliases (text.size _code) (get@ #source context))
[state' representation] (let [## TODO: Simplify ASAP
state (:share [anchor expression statement]
{<Context>
context}
{(State+ anchor expression statement)
(get@ #state context)})]
(<| (phase.run' state)
## TODO: Simplify ASAP
(:share [anchor expression statement]
{<Context>
context}
{(Operation anchor expression statement Text)
(execute (get@ #configuration context) input)})))]
(wrap [(|> context
(set@ #state state')
(set@ #source source'))
representation]))))
(def: #export (run Monad<!> Console<!> platform configuration translation-bundle)
(All [! anchor expression statement]
(-> (Monad !)
(Console !) (Platform ! anchor expression statement)
Configuration
(translation.Bundle anchor expression statement)
(! Any)))
(do Monad<!>
[state (initialize Monad<!> Console<!> platform configuration)]
(loop [context {#configuration configuration
#state state
#source ..fresh-source}
multi-line? #0]
(do @
[_ (if multi-line?
(:: Console<!> write " ")
(:: Console<!> write "> "))
line (:: Console<!> read-line)]
(if (and (not multi-line?)
(text/= ..exit-command line))
(:: Console<!> write ..farewell-message)
(case (read-eval-print (update@ #source (add-line line) context))
(#error.Success [context' representation])
(do @
[_ (:: Console<!> write representation)]
(recur context' #0))
(#error.Failure error)
(if (ex.match? syntax.end-of-file error)
(recur context #1)
(exec (log! (ex.construct ..error error))
(recur (set@ #source ..fresh-source context) #0))))))
)))
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