Hi there,<br> Do you have any idea why the following code is not valid?<br><br><font class="Apple-style-span" face="'courier new', monospace">class Guess g where<br> makeGuess :: g -> String<br><br>instance Guess GuessLetter where<br>
makeGuess = ...<br><br>instance Guess GuessWord where<br> makeGuess = ...<br><br><font class="Apple-style-span" color="#ff0000"><b>-- | This function is nod valid </b></font><br>nextGuess :: Guess g => String -> g<br>
nextGuess = ...</font><br><br><br>Thank you.<br><br>-Haisheng<br><br>