Hey
Thanks for that didn't realise you could do that. I guess does this
mean i could do:
MODIFY_EXPR price = stmt_list
And gimple will be nice to me? Wo i am so impressed by this.
--Phil
On 6 February 2014 12:34, Florian Weimer <fweimer@xxxxxxxxxx> wrote:
> On 02/06/2014 01:14 PM, Philip Herron wrote:
>
>> I am trying to understand what way i could compile this in GCC can you
>> do the following in GENERIC make a nested function decl kind of like a
>> closure not quite sure what to do here.
>
>
> It's just a statement expression. The C front end supports them, so this
> might give you some idea how to implement them.
>
>
> void main (void) {
> const char * item = "test";
> const double price = ({
>
> double ret_tmp;
> if (item == "salad") {
> ret_tmp = 3.50;
> }
> else if (item == "muffin") {
> ret_tmp = 2.25;
> }
> else {
> ret_tmp = 2.00;
> }
> ret_tmp;
> });
> }
>
> To compile general closures, you have to apply a transformation called
> closure conversion. GCC's nested functions only provide downward closures,
> and require an executable stack for trampolines on most architectures, which
> many systems do not support.
>
> --
> Florian Weimer / Red Hat Product Security Team
