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Within LTS Haskell 24.33 (ghc-9.10.3)
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traceShowId :: Show a => a -> abase Debug.Trace Like traceShow but returns the shown value instead of a third value.
>>> traceShowId (1+2+3, "hello" ++ "world") (6,"helloworld") (6,"helloworld")
traceShowM :: (Show a, Applicative f) => a -> f ()base Debug.Trace Like traceM, but uses show on the argument to convert it to a String.
>>> :{ do x <- Just 3 traceShowM x y <- pure 12 traceShowM y pure (x*2 + y) :} 3 12 Just 18traceShowWith :: Show b => (a -> b) -> a -> abase Debug.Trace Like traceWith, but uses show on the result of the function to convert it to a String.
>>> traceShowWith length [1,2,3] 3 [1,2,3]
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base System.IO hShow is in the IO monad, and gives more comprehensive output than the (pure) instance of Show for Handle.
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base GHC.IO.Handle hShow is in the IO monad, and gives more comprehensive output than the (pure) instance of Show for Handle.
coarbitraryShow :: Show a => a -> Gen b -> Gen bQuickCheck Test.QuickCheck coarbitrary helper for lazy people :-).
forAllShow :: Testable prop => Gen a -> (a -> String) -> (a -> prop) -> PropertyQuickCheck Test.QuickCheck Like forAll, but with an explicitly given show function.
forAllShrinkShow :: Testable prop => Gen a -> (a -> [a]) -> (a -> String) -> (a -> prop) -> PropertyQuickCheck Test.QuickCheck Like forAllShrink, but with an explicitly given show function.
functionShow :: (Show a, Read a) => (a -> c) -> a :-> cQuickCheck Test.QuickCheck -
QuickCheck Test.QuickCheck Optional; used internally in order to improve shrinking. Tests a property but also quantifies over an extra value (with a custom shrink and show function). The Testable instance for functions defines propertyForAllShrinkShow in a way that improves shrinking.