mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 01:04:03 +00:00
28 lines
566 B
Rust
28 lines
566 B
Rust
mod stuff {
|
|
pub struct Item {
|
|
c_object: Box<CObj>,
|
|
}
|
|
pub struct CObj {
|
|
name: Option<String>,
|
|
}
|
|
impl Item {
|
|
pub fn new() -> Item {
|
|
Item {
|
|
c_object: Box::new(CObj { name: None }),
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
macro_rules! check_ptr_exist {
|
|
($var:expr, $member:ident) => (
|
|
(*$var.c_object).$member.is_some()
|
|
//~^ ERROR field `c_object` of struct `Item` is private
|
|
);
|
|
}
|
|
|
|
fn main() {
|
|
let item = stuff::Item::new();
|
|
println!("{}", check_ptr_exist!(item, name));
|
|
}
|