Copyright	(c) Nils Anders Danielsson 2004-2021
License	See the file LICENCE.
Maintainer	http://www.cse.chalmers.se/~nad/
Stability	experimental
Portability	non-portable (GHC-specific)
Safe Haskell	None
Language	Haskell2010

Test.ChasingBottoms.ApproxShow

Description

Functions for converting arbitrary (non-function, partial, possibly infinite) values into strings.

Synopsis

type Prec = Int
class ApproxShow a where
- approxShowsPrec :: Nat -> Prec -> a -> ShowS
- approxShows :: Nat -> a -> ShowS
- approxShow :: Nat -> a -> String

Documentation

type Prec = Int Source #

Precedence level.

class ApproxShow a where Source #

Minimal complete definition

approxShowsPrec

Methods

approxShowsPrec :: Nat -> Prec -> a -> ShowS Source #

The Data instance of ApproxShow makes sure that approxShowsPrec n behaves (more or less) like the derived version of showsPrec, with the following differences:

After n levels of descent into a term the output is replaced by "_".
All detectable occurences of bottoms are replaced by "_|_".
Non-bottom functions are displayed as "<function /= _|_>".

approxShows :: Nat -> a -> ShowS Source #

approxShow :: Nat -> a -> String Source #

Instances

Instances details

Data a => ApproxShow a Source #
Instance details Defined in Test.ChasingBottoms.ApproxShow Methods approxShowsPrec :: Nat -> Prec -> a -> ShowS Source # approxShows :: Nat -> a -> ShowS Source # approxShow :: Nat -> a -> String Source #