pprTrace package:ghc

pprTrace :: String -> SDoc -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

If debug output is on, show some SDoc on the screen

pprTraceDebug :: String -> SDoc -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

pprTraceException :: ExceptionMonad m => String -> SDoc -> m a -> m a

ghc GHC.Prelude GHC.Utils.Trace

pprTraceException desc x action runs action, printing a message if it throws an exception.

pprTraceIt :: Outputable a => String -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

pprTraceIt desc x is equivalent to pprTrace desc (ppr x) x

pprTraceM :: Applicative f => String -> SDoc -> f ()

ghc GHC.Prelude GHC.Utils.Trace

pprTraceUserWarning :: HasCallStack => SDoc -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

For when we want to show the user a non-fatal WARNING so that they can report a GHC bug, but don't want to panic.

pprTraceWith :: String -> (a -> SDoc) -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

pprTraceWith desc f x is equivalent to pprTrace desc (f x) x. This allows you to print details from the returned value as well as from ambient variables.

warnPprTrace :: HasCallStack => Bool -> String -> SDoc -> a -> a

ghc GHC.Prelude GHC.Utils.Trace

Just warn about an assertion failure, recording the given file and line number.

warnPprTraceM :: (Applicative f, HasCallStack) => Bool -> String -> SDoc -> f ()

ghc GHC.Prelude GHC.Utils.Trace