TRPL: associated constants #24990
TRPL: associated constants #24990
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r? @huonw (rust_highfive has picked a reviewer for you, use r? to override) |
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| % Associated Constants | |||
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| With the `associated_constants` feature, you can define constants like this: | |||
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associated_constants => associated_consts
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I believe there's also an allowance for associated constants of the form: pub struct Foo;
impl Foo {
pub const FOO: u32 = 3;
}e.g. an inherent constant associated to a type (maybe worth mentioning?) |
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cc @quantheory |
steveklabnik
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Yeah, worth mentioning for sure. Added, and nits fixed. |
| with `i32`. It will then use the default value. But, as in `i64`, we can also | ||
| add our own definition. | ||
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| Associated constants don’t have to be with a trait. An `impl` block for a `struct` |
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This phrasing is slightly odd. Did you mean "associated with a trait"?
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LGTM. There is also the ability to define a constant of type |
steveklabnik
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Yeah, let's hold off on the |
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| fn main() { | ||
| assert_eq!(1, <i32 as Foo>::ID); | ||
| assert_eq!(5, <i64 as Foo>::ID); |
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As one final nit, I think these are more idiomatically referred to without the angle-bracket syntax, e.g. i32::ID
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r=me with one final nit, thanks @steveklabnik! |
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@bors: r=alexcrichton rollup |
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📌 Commit 6b465f5 has been approved by |
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⌛ Testing commit 6b465f5 with merge 2e4fef0... |
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💔 Test failed - auto-linux-32-nopt-t |
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@bors: retry On Sat, May 2, 2015 at 10:44 AM, bors [email protected] wrote:
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