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Add anchors links for linked code snippets. #28422

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merged 2 commits into from
Sep 17, 2015
Merged

Add anchors links for linked code snippets. #28422

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320880e
Fix option link and anchor links.
Sep 15, 2015
b69a511
Added anchors for the code snippets.
Sep 15, 2015
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12 changes: 7 additions & 5 deletions src/doc/trpl/error-handling.md
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Expand Up @@ -33,12 +33,12 @@ systems may want to jump around.
* [Composing `Option` and `Result`](#composing-option-and-result)
* [The limits of combinators](#the-limits-of-combinators)
* [Early returns](#early-returns)
* [The `try!` macro](#the-try-macro)
* [The `try!` macro](#the-try!-macro)
* [Defining your own error type](#defining-your-own-error-type)
* [Standard library traits used for error handling](#standard-library-traits-used-for-error-handling)
* [The `Error` trait](#the-error-trait)
* [The `From` trait](#the-from-trait)
* [The real `try!` macro](#the-real-try-macro)
* [The real `try!` macro](#the-real-try!-macro)
* [Composing custom error types](#composing-custom-error-types)
* [Advice for library writers](#advice-for-library-writers)
* [Case study: A program to read population data](#case-study-a-program-to-read-population-data)
Expand Down Expand Up @@ -87,7 +87,9 @@ thread '<main>' 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.

<a name="code-unwrap-double"/>
```rust,should_panic

use std::env;

fn main() {
Expand Down Expand Up @@ -120,10 +122,9 @@ It would be better if we just showed the code for unwrapping because it is so
simple, but to do that, we will first need to explore the `Option` and `Result`
types. Both of these types have a method called `unwrap` defined on them.

## The `Option` type
### The `Option` type

The `Option` type is
[defined in the standard library][1]:
The `Option` type is [defined in the standard library][5]:

```rust
enum Option<T> {
Expand All @@ -138,6 +139,7 @@ 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:

<a name="code-option-ex-string-find"/>
```rust
// Searches `haystack` for the Unicode character `needle`. If one is found, the
// byte offset of the character is returned. Otherwise, `None` is returned.
Expand Down