Re: Compile time string parse

[Jarrett Billingsley]

On Tue, Mar 17, 2009 at 10:54 AM, Paolo Invernizzi
<arath...@fastwebnet.iit> wrote:
> Hi all,
> Someone can point me to a way of doing something like this with DMD 2.026:
>
> class A {
>    invariant(int) rev = std.conv.to!(int)("$Rev: 182 $");
> }
>
> I've messed up with metastrings and std.conv, but I cannot find a working way.
>
> Cheers, Paolo
>

int parseRevision(string s)
{
        // I'm assuming it'll always be of the form "\$ Rev: (\d+) \$"
        return to!(int)(s["$ Rev: ".length .. $ - 2]);
}

void main()
{
        immutable(int) x = parseRevision("$ Rev: 182 $");
        writefln(x);
}