--- | Raises an error when used on a "bad" 'SrcSpan'
-srcSpanStartLine :: SrcSpan -> Int
--- | Raises an error when used on a "bad" 'SrcSpan'
-srcSpanEndLine :: SrcSpan -> Int
--- | Raises an error when used on a "bad" 'SrcSpan'
-srcSpanStartCol :: SrcSpan -> Int
--- | Raises an error when used on a "bad" 'SrcSpan'
-srcSpanEndCol :: SrcSpan -> Int
+srcSpanStartLine :: RealSrcSpan -> Int
+srcSpanEndLine :: RealSrcSpan -> Int
+srcSpanStartCol :: RealSrcSpan -> Int
+srcSpanEndCol :: RealSrcSpan -> Int