pprint

Pretty print a generic value to stdout. This is particularly useful in the GHCi interactive environment.

Pretty-print any data type that has a Show instance. If you've never seen MonadIO before, you can think of this function as having the following type signature:

pPrint :: Show a => a -> IO ()

This function will only use colors if it detects it's printing to a TTY. This function is for printing to a dark background. Use pPrintLightBg for printing to a terminal with a light background. Different colors are used. Prints to stdout. Use pHPrint to print to a different Handle.

>>> pPrint [Just (1, "hello")]
[ Just
( 1
, "hello"
)
]

Pretty print a showable value. An easier alias for pretty-simple's pPrint. This will print in colour if useColorOnStderrUnsafe is true.

The pprint function outputs a value of any type that is an instance of Pretty to the standard output device by calling ppr and adding a newline.

Render document using xml-conduit's pretty-printer.

Pretty print a value to the standard output.

Pretty printing of values. This class is similar to the Pretty class from the Prettyprinter package, but it also provides pretty printing with a given precedence level. We are able to derive instances of this class for algebraic data types. You may need the DerivingVia and DerivingStrategies extensions.

data X = ... deriving Generic deriving PPrint via (Default X)

The derived instance will pretty print the value with a format similar to the one used by ormolu.

The :print & friends commands

Pretty print something that may be converted to a list as a list. Each entry is on a separate line, which means that we don't do clever pretty printing, and so this works well for large strucutures.

Alias for pPrint.

Similar to pPrint, but print in color regardless of whether the output goes to a TTY or not. See pPrint for an example of how to use this function.

Alias for pPrintForceColor.

Just like pPrintForceColorDarkBg, but for printing to a light background.