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Rollup merge of #30447 - Xmasreturns:Docu, r=steveklabnik

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Added sentences for description of code and changed x in the example to an int
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Manish Goregaokar 2015-12-18 13:43:46 +05:30
commit 4f8b32c96f
1 changed files with 6 additions and 4 deletions
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10
src/doc/book/patterns.md
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@ -27,7 +27,7 @@ There’s one pitfall with patterns: like anything that introduces a new binding
they introduce shadowing. For example:
```rust
let x = 'x';
let x = 1;
let c = 'c';
match c {
@ -41,12 +41,14 @@ This prints:
```text
x: c c: c
x: x
x: 1
```
In other words, `x =>` matches the pattern and introduces a new binding named
`x` that’s in scope for the match arm. Because we already have a binding named
`x`, this new `x` shadows it.
`x`. This new binding is in scope for the match arm and takes on the value of
`c`. Notice that the value of `x` outside the scope of the match has no bearing
on the value of `x` within it. Because we already have a binding named `x`, this
new `x` shadows it.
# Multiple patterns