quox/lib/Quox/Parser/FromParser/Error.idr

88 lines
2.6 KiB
Idris

module Quox.Parser.FromParser.Error
import Quox.Parser.Parser
import Quox.Typing
import System.File
import Quox.Pretty
public export
TypeError, LexError, ParseError : Type
TypeError = Typing.Error
LexError = Lexer.Error
ParseError = Parser.Error
%hide Typing.Error
%hide Lexer.Error
%hide Parser.Error
public export
data Error =
AnnotationNeeded (NameContexts d n) (Term d n)
| DuplicatesInEnum (List TagVal)
| TermNotInScope Name
| DimNotInScope PBaseName
| QtyNotGlobal Qty
| DimNameInTerm PBaseName
| WrapTypeError TypeError
| LoadError String FileError
| WrapParseError String ParseError
parameters (unicode, showContext : Bool)
export
prettyBounds : String -> Bounds -> Doc HL
prettyBounds file (MkBounds l1 c1 l2 c2) =
hcat [hl Free $ pretty file, hl Delim ":",
hl TVar $ pretty l1, hl Delim ":",
hl DVar $ pretty c1, hl Delim "-",
hl TVar $ pretty l2, hl Delim ":",
hl DVar $ pretty c2]
export
prettyParseError1 : String -> ParsingError _ -> Doc HL
prettyParseError1 file (Error msg Nothing) =
pretty msg
prettyParseError1 file (Error msg (Just bounds)) =
asep [prettyBounds file bounds <+> hl Delim ":", pretty msg]
export
prettyParseError : String -> ParseError -> Doc HL
prettyParseError file (LexError err) =
vsep ["lexical error:", nest 2 $ pretty $ show err]
prettyParseError file (ParseError errs) =
vsep $ "parse error:" ::
map (("-" <++>) . prettyParseError1 file) (toList errs)
export
prettyError : Error -> Doc HL
prettyError (AnnotationNeeded ctx tm) =
sep ["the term", prettyTerm unicode ctx.dnames ctx.tnames tm,
"needs a type annotation"]
-- [todo] print the original PTerm instead
prettyError (DuplicatesInEnum tags) =
sep ["duplicate tags in enum type", braces $ fillSep $ map pretty tags]
prettyError (DimNotInScope i) =
sep ["dimension", pretty0 unicode $ DV $ fromString i, "not in scope"]
prettyError (TermNotInScope x) =
sep ["term variable", pretty0 unicode $ F x {d = 0, n = 0}, "not in scope"]
prettyError (QtyNotGlobal pi) =
sep ["quantity", pretty0 unicode pi,
"can't be used on a top level declaration"]
prettyError (DimNameInTerm i) =
sep ["dimension variable", pretty0 unicode $ DV $ fromString i,
"used in a term context"]
prettyError (WrapTypeError err) =
Typing.prettyError unicode showContext $ trimContext 2 err
prettyError (LoadError str err) =
vsep [hsep ["couldn't load file", pretty str], fromString $ show err]
prettyError (WrapParseError file err) =
prettyParseError file err