[Outreach] Looking for a simple example of using comptime instead of macros

Brainstorming
16

With statement expressions (gcc) we can go even farther.
Look at this fancy macro:

#define fifo_inst(T, name)                                                          \
                                                                                    \
T##FifoClass name = {                                                               \
    .self = {0},                                                                    \
    .put = ({void __fn__(T *src) {return T##FifoPut(&name.self, src);} __fn__;}),   \
    .get = ({void __fn__(T *dst) {return T##FifoGet(&name.self, dst);} __fn__;}),   \
    .len = ({ u32 __fn__(void) {return name.self.length;} __fn__;}),                \
}

With this macro (kinda self-made C++ :slight_smile: ) we can then use fifo (or whatever) like this:

int main(void) {
    inst(fifo, Message, mq1);
    // create an instance (on stack) of fifo named mq1
    ...
    mq1.put(&message[k]);
    ...
    mq1.get(&m);

It’s cool, yeah, but it’s a sort of a gimmick, while in Zig generics can be dealt with in more or less standard and clean way.

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