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Rust unstable book: basic desc and example for const_indexing.

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Corey Farwell 2017-03-11 20:50:18 -05:00
parent 327e8e9196
commit 0dd03ffaf7
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src/doc/unstable-book/src/const-indexing.md
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@ -6,5 +6,14 @@ The tracking issue for this feature is: [#29947]
------------------------
The `const_indexing` feature allows the constant evaluation of index operations
on constant arrays and repeat expressions.
## Examples
```rust
#![feature(const_indexing)]
const ARR: [usize; 5] = [1, 2, 3, 4, 5];
const ARR2: [usize; ARR[1]] = [42, 99];
```