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(;module:
lux
(lux (control [monad #+ do]
["ex" exception #+ exception:])
(data [maybe]
[product]
["e" error]
[text "text/" Eq<Text>]
text/format
(coll [list]))
[meta]
(meta (type ["tc" check])
["s" syntax #+ syntax:]))
(luxc (lang ["la" analysis])))
(type: #export Eval
(-> Type Code (Meta Top)))
(type: #export Analyser
(-> Code (Meta la;Analysis)))
(def: #export version Text "0.6.0")
(def: #export (fail message)
(All [a] (-> Text (Meta a)))
(do meta;Monad<Meta>
[[file line col] meta;cursor
#let [location (format file
"," (|> line nat-to-int %i)
"," (|> col nat-to-int %i))]]
(meta;fail (format message "\n\n"
"@ " location))))
(def: #export (throw exception message)
(All [a] (-> ex;Exception Text (Meta a)))
(fail (exception message)))
(syntax: #export (assert exception message test)
(wrap (list (` (if (~ test)
(:: meta;Monad<Meta> (~' wrap) [])
(;;throw (~ exception) (~ message)))))))
(def: #export (with-expected-type expected action)
(All [a] (-> Type (Meta a) (Meta a)))
(function [compiler]
(case (action (set@ #;expected (#;Some expected) compiler))
(#e;Success [compiler' output])
(let [old-expected (get@ #;expected compiler)]
(#e;Success [(set@ #;expected old-expected compiler')
output]))
(#e;Error error)
(#e;Error error))))
(def: #export (with-type-env action)
(All [a] (-> (tc;Check a) (Meta a)))
(function [compiler]
(case (action (get@ #;type-context compiler))
(#e;Error error)
((fail error) compiler)
(#e;Success [context' output])
(#e;Success [(set@ #;type-context context' compiler)
output]))))
(def: #export (with-fresh-type-env action)
(All [a] (-> (Meta a) (Meta a)))
(function [compiler]
(let [old (get@ #;type-context compiler)]
(case (action (set@ #;type-context tc;fresh-context compiler))
(#e;Success [compiler' output])
(#e;Success [(set@ #;type-context old compiler')
output])
output
output))))
(def: #export (infer actualT)
(-> Type (Meta Unit))
(do meta;Monad<Meta>
[expectedT meta;expected-type]
(with-type-env
(tc;check expectedT actualT))))
(def: #export (pl-get key table)
(All [a] (-> Text (List [Text a]) (Maybe a)))
(case table
#;Nil
#;None
(#;Cons [k' v'] table')
(if (text/= 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 (text/= 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 (text/= key k')
(#;Cons [k' (f v')] table')
(#;Cons [k' v'] (pl-update key f table')))))
(def: #export (with-source-code source action)
(All [a] (-> Source (Meta a) (Meta a)))
(function [compiler]
(let [old-source (get@ #;source compiler)]
(case (action (set@ #;source source compiler))
(#e;Error error)
(#e;Error error)
(#e;Success [compiler' output])
(#e;Success [(set@ #;source old-source compiler')
output])))))
(def: #export (with-stacked-errors handler action)
(All [a] (-> (-> [] Text) (Meta a) (Meta a)))
(function [compiler]
(case (action compiler)
(#e;Success [compiler' output])
(#e;Success [compiler' output])
(#e;Error error)
(#e;Error (if (text/= "" error)
(handler [])
(format (handler []) "\n\n-----------------------------------------\n\n" error))))))
(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] (-> (Meta a) (Meta [Scope a])))
(function [compiler]
(case (action (update@ #;scopes (|>. (#;Cons fresh-scope)) compiler))
(#e;Success [compiler' output])
(case (get@ #;scopes compiler')
#;Nil
(#e;Error "Impossible error: Drained scopes!")
(#;Cons head tail)
(#e;Success [(set@ #;scopes tail compiler')
[head output]]))
(#e;Error error)
(#e;Error error))))
(def: #export (with-current-module name action)
(All [a] (-> Text (Meta a) (Meta a)))
(function [compiler]
(case (action (set@ #;current-module (#;Some name) compiler))
(#e;Success [compiler' output])
(#e;Success [(set@ #;current-module
(get@ #;current-module compiler)
compiler')
output])
(#e;Error error)
(#e;Error error))))
(def: #export (with-cursor cursor action)
(All [a] (-> Cursor (Meta a) (Meta a)))
(if (text/= "" (product;left cursor))
action
(function [compiler]
(let [old-cursor (get@ #;cursor compiler)]
(case (action (set@ #;cursor cursor compiler))
(#e;Success [compiler' output])
(#e;Success [(set@ #;cursor old-cursor compiler')
output])
(#e;Error error)
(#e;Error error))))))
(def: (normalize-char char)
(-> Nat Text)
(case char
(^ (char "*")) "_ASTER_"
(^ (char "+")) "_PLUS_"
(^ (char "-")) "_DASH_"
(^ (char "/")) "_SLASH_"
(^ (char "\\")) "_BSLASH_"
(^ (char "_")) "_UNDERS_"
(^ (char "%")) "_PERCENT_"
(^ (char "$")) "_DOLLAR_"
(^ (char "'")) "_QUOTE_"
(^ (char "`")) "_BQUOTE_"
(^ (char "@")) "_AT_"
(^ (char "^")) "_CARET_"
(^ (char "&")) "_AMPERS_"
(^ (char "=")) "_EQ_"
(^ (char "!")) "_BANG_"
(^ (char "?")) "_QM_"
(^ (char ":")) "_COLON_"
(^ (char ".")) "_PERIOD_"
(^ (char ",")) "_COMMA_"
(^ (char "<")) "_LT_"
(^ (char ">")) "_GT_"
(^ (char "~")) "_TILDE_"
(^ (char "|")) "_PIPE_"
_
(text;from-code char)))
(def: underflow Nat (n.dec +0))
(def: #export (normalize-name name)
(-> Text Text)
(loop [idx (n.dec (text;size name))
output ""]
(if (n.= underflow idx)
output
(recur (n.dec idx) (format (|> (text;nth idx name) maybe;assume normalize-char) output)))))
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