module Errors (
interr, todo,
ErrorLvl(..), Error, makeError, errorLvl, showError, errorAtPos
) where
import Position (Position(..), isInternalPos)
interr :: String -> a
interr :: forall a. String -> a
interr String
msg = forall a. HasCallStack => String -> a
error (String
"INTERNAL COMPILER ERROR:\n"
forall a. [a] -> [a] -> [a]
++ Int -> String -> String
indentMultilineString Int
2 String
msg
forall a. [a] -> [a] -> [a]
++ String
"\n")
todo :: String -> a
todo :: forall a. String -> a
todo String
msg = forall a. HasCallStack => String -> a
error (String
"Feature not yet implemented:\n"
forall a. [a] -> [a] -> [a]
++ Int -> String -> String
indentMultilineString Int
2 String
msg
forall a. [a] -> [a] -> [a]
++ String
"\n")
data ErrorLvl = WarningErr
| ErrorErr
| FatalErr
deriving (ErrorLvl -> ErrorLvl -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: ErrorLvl -> ErrorLvl -> Bool
$c/= :: ErrorLvl -> ErrorLvl -> Bool
== :: ErrorLvl -> ErrorLvl -> Bool
$c== :: ErrorLvl -> ErrorLvl -> Bool
Eq, Eq ErrorLvl
ErrorLvl -> ErrorLvl -> Bool
ErrorLvl -> ErrorLvl -> Ordering
ErrorLvl -> ErrorLvl -> ErrorLvl
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: ErrorLvl -> ErrorLvl -> ErrorLvl
$cmin :: ErrorLvl -> ErrorLvl -> ErrorLvl
max :: ErrorLvl -> ErrorLvl -> ErrorLvl
$cmax :: ErrorLvl -> ErrorLvl -> ErrorLvl
>= :: ErrorLvl -> ErrorLvl -> Bool
$c>= :: ErrorLvl -> ErrorLvl -> Bool
> :: ErrorLvl -> ErrorLvl -> Bool
$c> :: ErrorLvl -> ErrorLvl -> Bool
<= :: ErrorLvl -> ErrorLvl -> Bool
$c<= :: ErrorLvl -> ErrorLvl -> Bool
< :: ErrorLvl -> ErrorLvl -> Bool
$c< :: ErrorLvl -> ErrorLvl -> Bool
compare :: ErrorLvl -> ErrorLvl -> Ordering
$ccompare :: ErrorLvl -> ErrorLvl -> Ordering
Ord)
data Error = Error ErrorLvl Position [String]
instance Eq Error where
(Error ErrorLvl
lvl1 Position
pos1 [String]
_) == :: Error -> Error -> Bool
== (Error ErrorLvl
lvl2 Position
pos2 [String]
_) = ErrorLvl
lvl1 forall a. Eq a => a -> a -> Bool
== ErrorLvl
lvl2 Bool -> Bool -> Bool
&& Position
pos1 forall a. Eq a => a -> a -> Bool
== Position
pos2
instance Ord Error where
(Error ErrorLvl
lvl1 Position
pos1 [String]
_) < :: Error -> Error -> Bool
< (Error ErrorLvl
lvl2 Position
pos2 [String]
_) = Position
pos1 forall a. Ord a => a -> a -> Bool
< Position
pos2
Bool -> Bool -> Bool
|| (Position
pos1 forall a. Eq a => a -> a -> Bool
== Position
pos2 Bool -> Bool -> Bool
&& ErrorLvl
lvl1 forall a. Ord a => a -> a -> Bool
< ErrorLvl
lvl2)
Error
e1 <= :: Error -> Error -> Bool
<= Error
e2 = Error
e1 forall a. Ord a => a -> a -> Bool
< Error
e2 Bool -> Bool -> Bool
|| Error
e1 forall a. Eq a => a -> a -> Bool
== Error
e2
makeError :: ErrorLvl -> Position -> [String] -> Error
makeError :: ErrorLvl -> Position -> [String] -> Error
makeError = ErrorLvl -> Position -> [String] -> Error
Error
errorLvl :: Error -> ErrorLvl
errorLvl :: Error -> ErrorLvl
errorLvl (Error ErrorLvl
lvl Position
_ [String]
_) = ErrorLvl
lvl
showError :: Error -> String
showError :: Error -> String
showError (Error ErrorLvl
_ Position
pos (String
l:[String]
ls)) | Position -> Bool
isInternalPos Position
pos =
String
"INTERNAL ERROR!\n"
forall a. [a] -> [a] -> [a]
++ String
" >>> " forall a. [a] -> [a] -> [a]
++ String
l forall a. [a] -> [a] -> [a]
++ String
"\n"
forall a. [a] -> [a] -> [a]
++ (Int -> String -> String
indentMultilineString Int
2 forall b c a. (b -> c) -> (a -> b) -> a -> c
. [String] -> String
unlines) [String]
ls
showError (Error ErrorLvl
lvl (Position String
fname Int
row Int
col) (String
l:[String]
ls)) =
let
prefix :: String
prefix = String
fname forall a. [a] -> [a] -> [a]
++ String
":" forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show (Int
row::Int) forall a. [a] -> [a] -> [a]
++ String
": "
forall a. [a] -> [a] -> [a]
++ String
"(column "
forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show (Int
col::Int)
forall a. [a] -> [a] -> [a]
++ String
") ["
forall a. [a] -> [a] -> [a]
++ ErrorLvl -> String
showErrorLvl ErrorLvl
lvl
forall a. [a] -> [a] -> [a]
++ String
"] "
showErrorLvl :: ErrorLvl -> String
showErrorLvl ErrorLvl
WarningErr = String
"WARNING"
showErrorLvl ErrorLvl
ErrorErr = String
"ERROR"
showErrorLvl ErrorLvl
FatalErr = String
"FATAL"
in
String
prefix forall a. [a] -> [a] -> [a]
++ String
"\n"
forall a. [a] -> [a] -> [a]
++ String
" >>> " forall a. [a] -> [a] -> [a]
++ String
l forall a. [a] -> [a] -> [a]
++ String
"\n"
forall a. [a] -> [a] -> [a]
++ (Int -> String -> String
indentMultilineString Int
2 forall b c a. (b -> c) -> (a -> b) -> a -> c
. [String] -> String
unlines) [String]
ls
showError (Error ErrorLvl
_ Position
_ [] ) = forall a. String -> a
interr String
"Errors: showError:\
\ Empty error message!"
errorAtPos :: Position -> [String] -> a
errorAtPos :: forall a. Position -> [String] -> a
errorAtPos Position
pos [String]
msg = (forall a. HasCallStack => String -> a
error forall b c a. (b -> c) -> (a -> b) -> a -> c
. Error -> String
showError forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorLvl -> Position -> [String] -> Error
makeError ErrorLvl
ErrorErr Position
pos) [String]
msg
indentMultilineString :: Int -> String -> String
indentMultilineString :: Int -> String -> String
indentMultilineString Int
n = [String] -> String
unlines forall b c a. (b -> c) -> (a -> b) -> a -> c
. (forall a b. (a -> b) -> [a] -> [b]
map (String
spacesforall a. [a] -> [a] -> [a]
++)) forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> [String]
lines
where
spaces :: String
spaces = forall a. Int -> [a] -> [a]
take Int
n (forall a. a -> [a]
repeat Char
' ')