OpenEuphoria

Another Suggestion (Was: My Bits are Flipping (or, "Why Can't I Be=

• Posted by "Elliott S. de Andrade" <quantum_analyst at hotmail.com> Aug 27, 2004
• 577 views

>From: Travis Beaty <eucoder at travisbeaty.us>
>Reply-To: EUforum at topica.com
>To: EUforum at topica.com
>Subject: My Bits are Flipping (or, "Why Can't I Be Negative?")
>Date: Fri, 27 Aug 2004 08:08:37 -0500
>
>Hello all!
>
>How can I get this value, coming in from the C++ code side, to be seen by
>Euphoria as a negative number?  Or am I going to have to check the signed=
=20
>bit
>manually?
>
>Any help would be greatly appreciated!
>

    Unfotunately, parameters are only interpreted one way. Wouldn't it be=
=20
nice if you could do something like this:=20
call_back({routine_id("MouseCallback"), {C_INT, C_DOUBLE, C_DOUBLE},=20
C_DOUBLE})  --{mouse button, x-position, y-position} return: I don't know,=
=20
but something that needed to be a double. We wouldn't need to use any weird=
=20
workarounds for signed numbers, or strange stuff for doubles/floats.=20
Obviously, this would be quite complicated to implement. As it stands, the=
=20
interpreter just needs to copy a set of routines depending on how many=20
parameters there are for the callback. It would probably need some nice=20
assembler or C trickery to get this advanced method to work. With this=20
somewhat more complex method, though, we could create call-back procedures,=
=20
too (something that's moderately annoying.)

>
>Travis.
>

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