Hi,
Given the following enumerated type (as an example)

data P = A | B | C | D | E
         deriving (Show,Enum)

and the Prelude definition:
            enumFrom x  = map toEnum [ fromEnum x ..]

I guess that  the two expressions
        1) (map toEnum [ fromEnum A ..]) :: [P]
        2)  enumFrom A
should produces the same result, say
        [A,B,C,D,E] :: [P]

However, the expression 1)  produces an error as a consequence of trying to apply toEnum to the number 5.
¿Why the expression 2) doesn't not produce the same error?
¿Does Hugs not apply the definition in the Prelude for evaluating the expression 2)?
There should be something that I'm missing in this computation.
Some hints?

Thanks in advance,
Paqui

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Paqui Lucio                               
Dpto de LSI                   
Facultad de Informática
Paseo Manuel de Lardizabal, 1
20080-San Sebastián
SPAIN
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e-mail: paqui.lucio@ehu.es
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Web: http://www.sc.ehu.es/paqui
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