using a personal "double" type

[Mike Stump]

On Wednesday, November 19, 2003, at 09:28 AM, FEYEL Frederic. wrote:
> I would like to use my own "double" type, without having to modify a 
> source code, for the purpose of automatic differentiation of code.
>
> How would it be possible to tell g++ that each time it sees "double", 
> it should use my (assumed)wonderfull class defined in a given file ?

No, or rather, if you really want, -Ddouble=mydouble.  Better to just 
templatize the code and have the type a parameter.  This question is 
more appropriate for the gcc-help list.