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... This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
... If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
(.require
[library
[lux (.except)
[control
[monad (.only Monad do)]
["[0]" try (.only Try)]
["ex" exception (.only Exception)]]
[data
["[0]" text (.use "[1]#[0]" equivalence)
["%" \\format (.only format)]]]
[type (.only sharing)
["[0]" check]]
[compiler
["[0]" phase
["[0]" analysis
["[0]" module]
["[0]" type]]
["[0]" translation]
["[0]" declaration (.only State Operation)
["[0]" total]]]
["[0]" default
["[0]" syntax]
["[0]" platform (.only Platform)]
["[0]" init]]
["[0]" cli (.only Configuration)]]
[world
["[0]" file (.only File)]
["[0]" console (.only Console)]]]]
["[0]" /type])
(exception.def .public (error message)
(Exception Text)
message)
(def .public 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 declaration)
(Operation anchor expression declaration Any))
(declaration.of_analysis
(do phase.monad
[_ (module.create 0 ..module)]
(analysis.set_current_module ..module))))
(def (initialize Monad<!> Console<!> platform configuration translation_bundle)
(All (_ ! anchor expression declaration)
(-> (Monad !)
(Console !) (Platform ! anchor expression declaration)
Configuration
(translation.Bundle anchor expression declaration)
(! (State anchor expression declaration))))
(do Monad<!>
[state (platform.initialize platform translation_bundle)
state (platform.compile platform
(has cli.#module syntax.prelude configuration)
(has [declaration.#analysis declaration.#state
.#info .#mode]
{.#Interpreter}
state))
[state _] (of (the platform.#file_system platform)
lift (phase.result' state enter_module))
_ (of Console<!> write ..welcome_message)]
(in state)))
(with_expansions [<Interpretation> (these (Operation anchor expression declaration [Type Any]))]
(def (interpret_declaration code)
(All (_ anchor expression declaration)
(-> Code <Interpretation>))
(do phase.monad
[_ (total.phase code)
_ init.refresh]
(in [Any []])))
(def (interpret_expression code)
(All (_ anchor expression declaration)
(-> Code <Interpretation>))
(do [! phase.monad]
[state phase.state
.let [analyse (the [declaration.#analysis declaration.#phase] state)
synthesize (the [declaration.#synthesis declaration.#phase] state)
translate (the [declaration.#translation declaration.#phase] state)]
[_ codeT codeA] (declaration.of_analysis
(analysis.with_scope
(type.with_fresh_env
(do !
[[codeT codeA] (type.with_inference
(analyse code))
codeT (type.with_env
(check.clean codeT))]
(in [codeT codeA])))))
codeS (declaration.of_synthesis
(synthesize codeA))]
(declaration.of_translation
(translation.with_buffer
(do !
[codeH (translate codeS)
count translation.next
codeV (translation.evaluate! (format "interpretation_" (%.nat count)) codeH)]
(in [codeT codeV]))))))
(def (interpret configuration code)
(All (_ anchor expression declaration)
(-> Configuration Code <Interpretation>))
(function (_ state)
(when (<| (phase.result' state)
(sharing [anchor expression declaration]
(is (State anchor expression declaration)
state)
(is <Interpretation>
(interpret_declaration code))))
{try.#Success [state' output]}
{try.#Success [state' output]}
{try.#Failure error}
(if (ex.match? total.not_a_declaration error)
(<| (phase.result' state)
(sharing [anchor expression declaration]
(is (State anchor expression declaration)
state)
(is <Interpretation>
(interpret_expression code))))
{try.#Failure error}))))
)
(def (execute configuration code)
(All (_ anchor expression declaration)
(-> Configuration Code (Operation anchor expression declaration Text)))
(do phase.monad
[[codeT codeV] (interpret configuration code)
state phase.state]
(in (/type.represent (the [declaration.#analysis declaration.#state] state)
codeT
codeV))))
(type (Context anchor expression declaration)
(Record
[#configuration Configuration
#state (State anchor expression declaration)
#source Source]))
(with_expansions [<Context> (these (Context anchor expression declaration))]
(def (read_eval_print context)
(All (_ anchor expression declaration)
(-> <Context> (Try [<Context> Text])))
(do try.monad
[.let [[_where _offset _code] (the #source context)]
[source' input] (syntax.parse ..module syntax.no_aliases (text.size _code) (the #source context))
[state' representation] (let [... TODO: Simplify ASAP
state (sharing [anchor expression declaration]
(is <Context>
context)
(is (State anchor expression declaration)
(the #state context)))]
(<| (phase.result' state)
... TODO: Simplify ASAP
(sharing [anchor expression declaration]
(is <Context>
context)
(is (Operation anchor expression declaration Text)
(execute (the #configuration context) input)))))]
(in [(|> context
(has #state state')
(has #source source'))
representation]))))
(def .public (run! Monad<!> Console<!> platform configuration translation_bundle)
(All (_ ! anchor expression declaration)
(-> (Monad !)
(Console !) (Platform ! anchor expression declaration)
Configuration
(translation.Bundle anchor expression declaration)
(! Any)))
(do [! Monad<!>]
[state (initialize Monad<!> Console<!> platform configuration)]
(loop (again [context [#configuration configuration
#state state
#source ..fresh_source]
multi_line? false])
(do !
[_ (if multi_line?
(of Console<!> write " ")
(of Console<!> write "> "))
line (of Console<!> read_line)]
(if (and (not multi_line?)
(text#= ..exit_command line))
(of Console<!> write ..farewell_message)
(when (read_eval_print (revised #source (add_line line) context))
{try.#Success [context' representation]}
(do !
[_ (of Console<!> write representation)]
(again context' false))
{try.#Failure error}
(if (ex.match? syntax.end_of_file error)
(again context true)
(exec (log! (ex.error ..error error))
(again (has #source ..fresh_source context) false))))))
)))
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