Re: Enterring Hex Number

[Philippe Lhoste <PhiLho@...>]

glenn-edgar@onyxengr.com wrote:
> I have been involved recently in embedding lua in settop products for debug 
> and testing purposes.  Working in a hardware environment, there is the need 
> to work with hex numbers.  I worked around it by using helper functions, but 
> it is still sort of clumsy in the user had to enter 
> a= hex("0xff00ff")  instead of a = 0xff 00

Well, given Lua syntax sugar, you can write:
a = x"FF00FF" or a = h'FF00FF'
which is almost as succint and quite readable too.
Of course, x or h is the function that convert a string to a decimal 
number. Can be in Lua (I think there are examples around) or in C.

> I read previous posting an it appears that the lex part of lua could be 
> extended to do that, but it would mean that I would have modified version 
> away from the baseline.
>
> Any suggestions on the correct approach to handling hex numbers.

You can change Lua to have a syntax familiar to C programmers, but it 
looks a bit like an overkill to me.

--
Philippe Lhoste
--  (near) Paris -- France
--  http://Phi.Lho.free.fr
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