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Make note that Ordering is builtin.

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This way people won't try to copy/paste it in.
This commit is contained in:
Steve Klabnik 2014-08-20 16:56:29 -04:00
parent 655600b01b
commit d1e37399a2
1 changed files with 5 additions and 6 deletions
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src/doc/guide.md
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@ -1073,10 +1073,10 @@ destructuring `let`.
## Enums ## Enums
Finally, Rust has a "sum type", an **enum**. Enums are an incredibly useful Finally, Rust has a "sum type", an **enum**. Enums are an incredibly useful
feature of Rust, and are used throughout the standard library. Enums look feature of Rust, and are used throughout the standard library. This is an enum
like this: that is provided by the Rust standard library:
``` ```{rust}
enum Ordering { enum Ordering {
Less, Less,
Equal, Equal,
@ -1084,9 +1084,8 @@ enum Ordering {
} }
``` ```
This is an enum that is provided by the Rust standard library. An `Ordering` An `Ordering` can only be _one_ of `Less`, `Equal`, or `Greater` at any given
can only be _one_ of `Less`, `Equal`, or `Greater` at any given time. Here's time. Here's an example:
an example:
```rust ```rust
fn cmp(a: int, b: int) -> Ordering { fn cmp(a: int, b: int) -> Ordering {