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module CC.Types where
import CC.Pretty
-- | Names of variables in the program
type Name = String
-- | Position in a source file; `SourcePos line column`, both zero-based
data SourcePos = SourcePos Int Int
deriving (Show, Read, Eq, Ord)
instance Pretty SourcePos where
pretty (SourcePos line col) = show (line + 1) ++ ":" ++ show (col + 1)
-- | A range in the original source code (for diagnostics and debug
-- information); [from, to).
data SourceRange = SourceRange SourcePos SourcePos
deriving (Show, Read)
instance Pretty SourceRange where
pretty (SourceRange from@(SourcePos fromLine fromCol) to@(SourcePos toLine toCol))
| fromLine == toLine =
show (fromLine + 1) ++ ":" ++ show (fromCol + 1) ++ "-" ++ show toCol
| otherwise =
show from ++ "-" ++ show to
class HasRange a where
range :: a -> SourceRange
mergeRange :: SourceRange -> SourceRange -> SourceRange
mergeRange (SourceRange p1 p2) (SourceRange q1 q2) = SourceRange (min p1 q1) (max p2 q2)
-- | A newtype with no-op Read and Show instances
newtype RawString = RawString String
instance Read RawString where
readsPrec _ s = [(RawString s, "")]
instance Show RawString where
show (RawString s) = s
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