Function-local bitflags #71

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opened 2017-03-07 11:34:28 -06:00 by dtolnay · 0 comments

dtolnay commented

2017-03-07 11:34:28 -06:00

(Migrated from github.com)

Is there any hope of supporting usage like this? The error here is inconsistent with being able to declare structs and other types of items local to a function.

#[macro_use]
extern crate bitflags;

fn main() {
    bitflags! {
        flags Flags: u8 {
            const A = 1,
            const B = 2,
        }
    }
    println!("{:?}", A);
}

error[E0425]: cannot find value `A` in module `super::super`
  --> src/main.rs:5:5
   |
5  |       bitflags! {
   |  _____^ starting here...
6  | |         flags Flags: u8 {
7  | |             const A = 1,
8  | |             const B = 2,
9  | |         }
10 | |     }
   | |_____^ ...ending here: not found in `super::super`
   |
   = note: this error originates in a macro outside of the current crate

Is there any hope of supporting usage like this? The error here is inconsistent with being able to declare structs and other types of items local to a function. ```rust #[macro_use] extern crate bitflags; fn main() { bitflags! { flags Flags: u8 { const A = 1, const B = 2, } } println!("{:?}", A); } ``` ``` error[E0425]: cannot find value `A` in module `super::super` --> src/main.rs:5:5 | 5 | bitflags! { | _____^ starting here... 6 | | flags Flags: u8 { 7 | | const A = 1, 8 | | const B = 2, 9 | | } 10 | | } | |_____^ ...ending here: not found in `super::super` | = note: this error originates in a macro outside of the current crate ```

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gh-bitflags/bitflags#71

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