My guess is widgetToPageContent is a function that takes "do addCassius ..."
and returns a value in the monad "m T" where "T" is some datatype like "data
T = PageContent x y z | ..." . The "<-" removes the "m" from "m T" and
pattern matches "x", "y" and "z" to "title", "headTags" and "bodyTags".
-deech
On Fri, May 13, 2011 at 9:55 PM,
In The Yesod Book, I see the following code:
defaultLayout contents = do PageContent title headTags bodyTags <- widgetToPageContent $ do addCassius ...
How does this work? Is bodyTags drawn from widgetToPageContent and then used as the third argument to PageContent?
tia, Lee
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