elm/compiler/Transform/SafeNames.hs

78 lines
No EOL
2.6 KiB
Haskell

{-# OPTIONS_GHC -Wall #-}
module Transform.SafeNames (metadataModule) where
import Control.Arrow (first, (***))
import SourceSyntax.Expression
import SourceSyntax.Location
import SourceSyntax.Module
import SourceSyntax.Pattern
import qualified Data.Set as Set
import qualified Parse.Helpers as PHelp
var :: String -> String
var = dereserve . deprime
where
deprime = map (\c -> if c == '\'' then '$' else c)
dereserve x = case Set.member x PHelp.jsReserveds of
False -> x
True -> "$" ++ x
pattern :: Pattern -> Pattern
pattern pat =
case pat of
PVar x -> PVar (var x)
PLiteral _ -> pat
PRecord fs -> PRecord (map var fs)
PAnything -> pat
PAlias x p -> PAlias (var x) (pattern p)
PData name ps -> PData name (map pattern ps)
expression :: LExpr t v -> LExpr t v
expression (L loc expr) =
let f = expression in
L loc $
case expr of
Literal _ -> expr
Var x -> Var (var x)
Range e1 e2 -> Range (f e1) (f e2)
ExplicitList es -> ExplicitList (map f es)
Binop op e1 e2 -> Binop op (f e1) (f e2)
Lambda p e -> Lambda (pattern p) (f e)
App e1 e2 -> App (f e1) (f e2)
MultiIf ps -> MultiIf (map (f *** f) ps)
Let defs body -> Let (map definition defs) (f body)
Case e cases -> Case (f e) $ map (pattern *** f) cases
Data name es -> Data name (map f es)
Access e x -> Access (f e) (var x)
Remove e x -> Remove (f e) (var x)
Insert e x v -> Insert (f e) (var x) (f v)
Modify r fs -> Modify (f r) (map (var *** f) fs)
Record fs -> Record (map (var *** f) fs)
Markdown uid md es -> Markdown uid md (map f es)
definition :: Def t v -> Def t v
definition def =
case def of
Def p e -> Def (pattern p) (expression e)
TypeAnnotation name t -> TypeAnnotation (var name) t
metadataModule :: MetadataModule t v -> MetadataModule t v
metadataModule modul =
modul
{ names = map var (names modul)
, exports = map var (exports modul)
, imports = map (first var) (imports modul)
, program = expression (program modul)
, aliases =
let makeSafe (name,tvars,tipe,ds) = (var name, tvars, tipe, ds)
in map makeSafe (aliases modul)
, datatypes =
let makeSafe (name,tvars,ctors,ds) = (var name, tvars, map (first var) ctors, ds)
in map makeSafe (datatypes modul)
, foreignImports =
let makeSafe (js,expr,elm,tipe) = (js, expression expr, var elm, tipe)
in map makeSafe (foreignImports modul)
, foreignExports =
let makeSafe (js,elm,tipe) = (js, var elm, tipe)
in map makeSafe (foreignExports modul)
}