From 1a3b422207957c1707980d5624f37f9e9d41ce92 Mon Sep 17 00:00:00 2001 From: Ms2ger Date: Fri, 18 Sep 2015 15:52:19 +0200 Subject: [PATCH] Use divs with ids rather than as with names. The id attribute has been an official part of HTML since 1997. There is no reason not to use it. --- src/doc/trpl/error-handling.md | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/doc/trpl/error-handling.md b/src/doc/trpl/error-handling.md index 230eb0a85ab0f..edb794a54aea4 100644 --- a/src/doc/trpl/error-handling.md +++ b/src/doc/trpl/error-handling.md @@ -87,7 +87,7 @@ thread '
' panicked at 'Invalid number: 11', src/bin/panic-simple.rs:5 Here's another example that is slightly less contrived. A program that accepts an integer as an argument, doubles it and prints it. - +
```rust,should_panic use std::env; @@ -99,6 +99,7 @@ fn main() { println!("{}", 2 * n); } ``` +
If you give this program zero arguments (error 1) or if the first argument isn't an integer (error 2), the program will panic just like in the first @@ -139,7 +140,7 @@ system is an important concept because it will cause the compiler to force the programmer to handle that absence. Let's take a look at an example that tries to find a character in a string: - +
```rust // Searches `haystack` for the Unicode character `needle`. If one is found, the // byte offset of the character is returned. Otherwise, `None` is returned. @@ -152,6 +153,7 @@ fn find(haystack: &str, needle: char) -> Option { None } ``` +
Notice that when this function finds a matching character, it doen't just return the `offset`. Instead, it returns `Some(offset)`. `Some` is a variant or