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(;module:
lux
(lux (control monad)
(data [text "T/" Eq<Text>]
text/format
[product]
["R" result])
[macro #+ Monad<Lux>]
(type ["TC" check]))
(luxc (lang ["la" analysis])))
(type: #export Eval
(-> Type Code (Lux Top)))
(type: #export Analyser
(-> Code (Lux la;Analysis)))
(type: #export Path Text)
(type: #export Mode
#Build
#Eval
#REPL)
(def: #export (fail message)
(All [a] (-> Text (Lux a)))
(do Monad<Lux>
[[file line col] macro;cursor
#let [location (format file
"," (|> line nat-to-int %i)
"," (|> col nat-to-int %i))]]
(macro;fail (format "@ " location
"\n" message))))
(def: #export (with-expected-type expected action)
(All [a] (-> Type (Lux a) (Lux a)))
(function [compiler]
(case (action (set@ #;expected (#;Some expected) compiler))
(#R;Success [compiler' output])
(let [old-expected (get@ #;expected compiler)]
(#R;Success [(set@ #;expected old-expected compiler')
output]))
(#R;Error error)
(#R;Error error))))
(def: #export (within-type-env action)
(All [a] (-> (TC;Check a) (Lux a)))
(function [compiler]
(case (action (get@ #;type-context compiler))
(#R;Error error)
(#R;Error error)
(#R;Success [context' output])
(#R;Success [(set@ #;type-context context' compiler)
output]))))
(def: #export (pl-get key table)
(All [a] (-> Text (List [Text a]) (Maybe a)))
(case table
#;Nil
#;None
(#;Cons [k' v'] table')
(if (T/= key k')
(#;Some v')
(pl-get key table'))))
(def: #export (pl-contains? key table)
(All [a] (-> Text (List [Text a]) Bool))
(case (pl-get key table)
(#;Some _)
true
#;None
false))
(def: #export (pl-put key val table)
(All [a] (-> Text a (List [Text a]) (List [Text a])))
(case table
#;Nil
(list [key val])
(#;Cons [k' v'] table')
(if (T/= key k')
(#;Cons [key val]
table')
(#;Cons [k' v']
(pl-put key val table')))))
(def: #export (pl-update key f table)
(All [a] (-> Text (-> a a) (List [Text a]) (List [Text a])))
(case table
#;Nil
#;Nil
(#;Cons [k' v'] table')
(if (T/= key k')
(#;Cons [k' (f v')] table')
(#;Cons [k' v'] (pl-update key f table')))))
(def: #export (with-source-code source action)
(All [a] (-> [Cursor Text] (Lux a) (Lux a)))
(function [compiler]
(let [old-source (get@ #;source compiler)]
(case (action (set@ #;source source compiler))
(#R;Error error)
(#R;Error error)
(#R;Success [compiler' output])
(#R;Success [(set@ #;source old-source compiler')
output])))))
(def: #export (with-stacked-errors handler action)
(All [a] (-> (-> [] Text) (Lux a) (Lux a)))
(function [compiler]
(case (action compiler)
(#R;Success [compiler' output])
(#R;Success [compiler' output])
(#R;Error error)
(#R;Error (if (T/= "" error)
(handler [])
(format error "\n-----------------------------------------\n" (handler [])))))))
(def: fresh-bindings
(All [k v] (Bindings k v))
{#;counter +0
#;mappings (list)})
(def: fresh-scope
Scope
{#;name (list)
#;inner +0
#;locals fresh-bindings
#;captured fresh-bindings})
(def: #export (with-scope action)
(All [a] (-> (Lux a) (Lux [Scope a])))
(function [compiler]
(case (action (update@ #;scopes (|>. (#;Cons fresh-scope)) compiler))
(#R;Success [compiler' output])
(case (get@ #;scopes compiler')
#;Nil
(#R;Error "Impossible error: Drained scopes!")
(#;Cons head tail)
(#R;Success [(set@ #;scopes tail compiler')
[head output]]))
(#R;Error error)
(#R;Error error))))
(def: #export (with-cursor cursor action)
(All [a] (-> Cursor (Lux a) (Lux a)))
(if (T/= "" (product;left cursor))
action
(function [compiler]
(let [old-cursor (get@ #;cursor compiler)]
(case (action (set@ #;cursor cursor compiler))
(#R;Success [compiler' output])
(#R;Success [(set@ #;cursor old-cursor compiler')
output])
(#R;Error error)
(#R;Error error))))))
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