Exporting a function as main does not work as expected

[tbu-]

mod foo {
    pub fn bar() {
    }
}
pub use foo::bar as main;

does not compile due to

error: main function not found
aborting due to previous error

The expected behaviour would be that the compiler treats the global symbol main which resolves to foo::bar as the main function.

[Aatch]

Hmm, I'm not sure how I feel about this. I guess I'm leaning towards not supporting this, as the main function isn't really "exported" like re-exports are. Note that we do support main functions that aren't fn main() at the top level via the #[main] attribute.

[steveklabnik]

@rust-lang/lang , would this need an RFC?

[nrc]

Yeah this should get an RFC.

Does this have a motivation that #[main] can't address?

[tbu-]

@nrc Consistency. Using a main method from a library.

[steveklabnik]

I also think this should go through an RFC. @tbu- , please pursue one for this.