github_mirrors/rust-book-cn
1
0
Fork 0
mirror of https://github.com/rust-lang-cn/book-cn.git synced 2025-02-02 23:38:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

Give more enum motivation in the intro paragraph

Browse Source 
Taking suggestions from @aturon. I like how this foreshadows why this
chapter has sections on patterns.

Connects to #106.
This commit is contained in:
Carol (Nichols || Goulding) 2016-06-29 22:06:24 -06:00
parent b113cc9014
commit c7979df8b2
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/ch06-01-enums.md
View File

@ -1,12 +1,13 @@
# Enums
Next, let’s look at a feature of Rust that’s similar to structs, but also
different. Enumerations, or ‘enums’ as they’re more commonly called,
are an extremely powerful feature of Rust. Enums are a feature that are in many
languages, but what they can do is different per-language. Rust’s enums are
most similar to enums in functional languages.
Next, let’s look at *enumerations*, which allow you to define a type by
enumerating its possible values. Commonly called "enums", these unlock a lot of
power in Rust when combined with pattern matching. Enums are a feature that are
in many languages, but what they can do is different per-language. Rust’s enums
are most similar to "algebraic data types" in functional languages like F#,
OCaml, or Haskell.
Here’s an example of an enum:
Here’s an example of an enum definition:
```rust
enum IpAddrKind {