Accessing the crate's version and name from within

[Seldaek]

It would be great to have a way to access the values in:

#[link(name = "blob", vers = "1.0", author = "foo")];

To print usage info in executables without duplicating this info.

[brson]

The solution could maybe be related to that of #5642

[emberian]

This was recently requested. Given that we have a unified crate_id now, a crate_version!() would probably be appropriate.

[alexcrichton]

Cargo is now responsible for versions and exports version numbers through environment variables. Rustc, however, is still responsible for the name of the crate, so all that's really necessary to do here would be to expose the crate name via some sort of syntax extension (possibly)

[steveklabnik]

@alexcrichton couldn't the Cargo.toml entry for name be exposed just like the version ones are?

[alexcrichton]

@steveklabnik yes that's just passed in through --crate-name which is what the compiler would expose.

[steveklabnik]

I'm pulling a massive triage effort to get us ready for 1.0. As part of this, I'm moving stuff that's wishlist-like to the RFCs repo, as that's where major new things should get discussed/prioritized.

This issue has been moved to the RFCs repo: rust-lang/rfcs#782