Rust mod/path question

gistfile1.rs

/*
Everything is in a single crate. The directory structure is as follows:

.
├── b
│   └── mod.rs
├── c
│   └── mod.rs
├── d
│   └── mod.rs
└── main.rs
*/

// -------------------- main.rs

mod b;
mod c;

fn main() {
	println!("{}", b::foo());
	println!("{}", c::bar());
}

// -------------------- b/mod.rs

#[path="../d/mod.rs"]
mod d;

pub fn foo() -> int {
	1 + d::baz()
}

// -------------------- c/mod.rs

#[path="../d/mod.rs"]
mod d;

pub fn bar() -> int {
	2 + d::baz()
}

// -------------------- d/mod.rs

pub fn baz() -> int {
	10
}

/* My questions are these:

   1) In a single crate, is there a way for modules b and c to
   access baz() in d without using the #[path] directive
   (which, I gather, is non-idiomatic)?
   
   2) If the answer to 1) is no, then is the only way to do this
   by putting b and c in one crate and d in another crate? Is that
   the idiomatic solution?
   */