200 lines
4.2 KiB
Idris
200 lines
4.2 KiB
Idris
module Quox.Name
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import Quox.Loc
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import Quox.CharExtra
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import public Data.SnocList
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import Data.List
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import Control.Eff
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import Text.Lexer
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import Derive.Prelude
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%hide TT.Name
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%default total
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%language ElabReflection
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public export
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NameSuf : Type
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NameSuf = Nat
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public export
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data BaseName
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= UN String -- user-given name
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| MN String NameSuf -- machine-generated name
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| Unused -- "_"
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%runElab derive "BaseName" [Eq, Ord]
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export
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baseStr : BaseName -> String
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baseStr (UN x) = x
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baseStr (MN x i) = "\{x}#\{show i}"
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baseStr Unused = "_"
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export Show BaseName where show = show . baseStr
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export FromString BaseName where fromString = UN
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public export
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Mods : Type
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Mods = SnocList String
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public export
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record Name where
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constructor MakeName
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mods : Mods
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base : BaseName
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%runElab derive "Name" [Eq, Ord]
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public export %inline
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unq : BaseName -> Name
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unq = MakeName [<]
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||| add some namespaces to the beginning of a name
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public export %inline
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addMods : Mods -> Name -> Name
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addMods ms = {mods $= (ms <+>)}
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public export
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PBaseName : Type
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PBaseName = String
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public export
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record PName where
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constructor MakePName
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mods : Mods
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base : PBaseName
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%runElab derive "PName" [Eq, Ord]
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export %inline
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fromPName : PName -> Name
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fromPName p = MakeName p.mods $ UN p.base
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export %inline
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toPName : Name -> PName
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toPName p = MakePName p.mods $ baseStr p.base
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export %inline
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fromPBaseName : PBaseName -> Name
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fromPBaseName = MakeName [<] . UN
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export
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Show PName where
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show (MakePName mods base) =
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show $ concat $ intersperse "." $ toList $ mods :< base
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export Show Name where show = show . toPName
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export FromString PName where fromString = MakePName [<]
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export FromString Name where fromString = fromPBaseName
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public export
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record BindName where
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constructor BN
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name : BaseName
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loc_ : Loc
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%runElab derive "BindName" [Eq, Ord, Show]
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export Located BindName where n.loc = n.loc_
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export Relocatable BindName where setLoc loc (BN x _) = BN x loc
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export
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toDotsP : PName -> String
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toDotsP x = fastConcat $ cast $ map (<+> ".") x.mods :< x.base
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export
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toDots : Name -> String
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toDots x = fastConcat $ cast $ map (<+> ".") x.mods :< baseStr x.base
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export
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fromListP : List1 String -> PName
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fromListP (x ::: xs) = go [<] x xs where
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go : SnocList String -> String -> List String -> PName
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go mods x [] = MakePName mods x
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go mods x (y :: ys) = go (mods :< x) y ys
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export %inline
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fromList : List1 String -> Name
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fromList = fromPName . fromListP
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export
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syntaxChars : List Char
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syntaxChars = ['(', ')', '[', ']', '{', '}', '"', '\'', ',', '.', ';', '^']
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export
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isSymStart, isSymCont : Char -> Bool
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isSymStart c = not (c `elem` syntaxChars) && isSymChar c
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isSymCont c = c == '\'' || isSymStart c
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export
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idStart, idCont, idEnd, idContEnd : Lexer
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idStart = pred isIdStart
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idCont = pred isIdCont
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idEnd = pred $ \c => c `elem` unpack "?!#"
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idContEnd = idCont <|> idEnd
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export
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symStart, symCont : Lexer
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symStart = pred isSymStart
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symCont = pred isSymCont
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export
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baseName : Lexer
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baseName = idStart <+> many idCont <+> many idEnd
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<|> symStart <+> many symCont
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export
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name : Lexer
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name = baseName <+> many (is '.' <+> baseName)
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export
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isName : String -> Bool
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isName str =
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case scan name [] (unpack str) of
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Just (_, []) => True
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_ => False
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public export
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data GenTag = GEN
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public export
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NameGen : Type -> Type
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NameGen = StateL GEN NameSuf
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export
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runNameGenWith : Has NameGen fs =>
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NameSuf -> Eff fs a -> Eff (fs - NameGen) (a, NameSuf)
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runNameGenWith = runStateAt GEN
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export
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runNameGen : Has NameGen fs => Eff fs a -> Eff (fs - NameGen) a
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runNameGen = map fst . runNameGenWith 0
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||| generate a fresh name with the given base
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export
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mn : Has NameGen fs => PBaseName -> Eff fs BaseName
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mn base = do
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i <- getAt GEN
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modifyAt GEN S
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pure $ MN base i
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||| generate a fresh binding name with the given base and
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||| (optionally) location `loc`
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export
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mnb : Has NameGen fs =>
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PBaseName -> {default noLoc loc : Loc} -> Eff fs BindName
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mnb base = pure $ BN !(mn base) loc
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export
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fresh : Has NameGen fs => BindName -> Eff fs BindName
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fresh (BN (UN str) loc) = mnb str {loc}
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fresh (BN (MN str k) loc) = mnb str {loc}
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fresh (BN Unused loc) = mnb "x" {loc}
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