[Haskell-cafe] Re: Evaluation of IO actions in record assignment

Use one of the general monadic combinators given in Control.Monad:

liftM3 UserPanel (xmlGetWidget xml castToEntry "signatureEntry") (xmlGetWidget xml castToEntry "passwordEntry") (xmlGetWidget xml castToEntry "repeatEntry")

or

return UserPanel `ap` xmlGetWidget xml castToEntry "signatureEntry" `ap` xmlGetWidget xml castToEntry "passwordEntry" `ap` xmlGetWidget xml castToEntry "repeatEntry"

Tillmann

Thanks! The problem is i really like specifying which fields in the record are assigned what. It's pretty easy to mess things up and for example assign the password-entry to the signature-field using your examples. Is there nothing I can do to xmlGetWidget to evaluate the actions when assigning? return UserPanel { userPanelSignatureEntry = *magic* xmlGetWidget xml castToEntry "signatureEntry", userPanelPasswordEntry = *magic* xmlGetWidget xml castToEntry "passwordEntry", userPanelRepeatEntry = *magic* xmlGetWidget xml castToEntry "repeatEntry"}