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Add nicer Show instance for Span

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This commit is contained in:
I-Al-Istannen 2020-03-31 12:03:24 +02:00
parent b226372ba7
commit f96f088eba
1 changed files with 8 additions and 1 deletions
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9
src/Mima/Asm/Phase1.hs
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@ -183,7 +183,14 @@ type Phase1 = [AsmToken Span]
type Parser = WriterT (Endo Phase1) (Parsec Void T.Text)
data Span = Span SourcePos SourcePos
deriving (Show)
instance Show Span where
show (Span start stop)
= "[" ++ formatSourcePos start ++ " - " ++ formatSourcePos stop ++ "]"
where
formatSourcePos sp
= formatPos (sourceLine sp) ++ ":" ++ formatPos (sourceColumn sp)
formatPos = show . unPos
addTokens :: [AsmToken Span] -> Parser ()
addTokens = tell . Endo . (++)