Generate code based on version rather than cfg

[taiki-e]

something like:

#[const_fn(1.36)]
const fn foo() {
    // ...
}

[jhpratt]

Even more powerful, with the use of autocfg, it may be possible to automatically determine if the function can be const. This would allow use on nightlies and betas similarly.

[taiki-e]

it may be possible to automatically determine if the function can be const.

Interesting, but does it actually seem like you have to compile the whole crate per const_fn attribute (as the function may depend on other items in the crate)?

[jhpratt]

Yeah, that would likely be the case now that you bring it up. Disregard 😄

[taiki-e]

Published 0.4.0 which fixes this issue.