[Haskell-cafe] What is the meaning of tilde ("~") symbol

kg kg2007.kg at gmail.com
Sat Feb 13 08:03:12 EST 2010


I'm reading the following subject :

In the sample code, we can see :

instance ReadAsAnyOf () ex
     where readAsAnyOf ~() = mzero

And, I've search the meaning of the symbol "~", but I've found nothing 
about this (note that's not easy to search "~" on google ...)

Could you give me a link about this, or explain me it ?

Thx in advance.

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