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Why some functions are not visible in Hoogle? Example: ppTopElement
ppTopElement :: Element -> String
-- Defined in `Text.XML.Light.Output'
Is it a bug?
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Workaround: go to FPcomplete instead.
haskell.org's Hoogle (http://www.haskell.org/hoogle/) is quite selective about what it searches, whereas FP Complete's hoogle at https://www.fpcomplete.com/hoogle searches more fully:
https://www.fpcomplete.com/hoogle?q=ppTopElement&env=ghc-7.4.2-stable-13.09
Searched for: ppTopElement
ppTopElement :: Element -> StringxmlText.XML.Light.OutputPretty printing renders XML documents faithfully, with the exception that whitespace may be added/removed in non-verbatim character data.
Being a hoogle rather than a hayoo, you can search by type, partial type, partial name, misordered type etc. For instance, searching for Element -> String gives lots of functions, some showing, some pretty printing, some just doing the top element.
BTW, Their online IDE is superb (click on the homepage https://www.fpcomplete.com/ and scroll down to Start a Project). It's slick, pretty, and you can add dependencies easily without tedious cabal install problems. I've been tempted to even use it at home where I have ghc installed!
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