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doc update

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generated from commit 837c7980e8a5b84be28825303faac0ba28e53446
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Harald Hoyer 2018-12-20 16:02:24 +01:00
parent 991a7a0786
commit 188d93a86a
15 changed files with 116 additions and 18 deletions
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11
tutorial4.html
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@ -140,7 +140,13 @@
<div id="content" class="content">
<main>
<pre><pre class="playpen"><code class="language-rust">use crate::chainerror::*;
<a class="header" href="#saving-coding-chars" id="saving-coding-chars"><h2>Saving coding chars</h2></a>
<p>Because decorating an error with more information should not
let you jump through hoops, <code>chainerror</code> has a quick macro for that.</p>
<p><code>mstrerror!()</code> fits right into <code>.map_err()</code> letting you quickly add
more debug strings.</p>
<p><code>mstrerror!()</code> even understands <code>format!()</code> syntax like <code>println!()</code>.</p>
<pre><pre class="playpen"><code class="language-rust">use crate::chainerror::*;
use std::error::Error;
use std::result::Result;
@ -150,7 +156,8 @@ fn do_some_io() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {
}
fn func2() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {
do_some_io().map_err(mstrerr!(&quot;func2 error&quot;))?;
let filename = &quot;foo.txt&quot;;
do_some_io().map_err(mstrerr!(&quot;Error reading '{}'&quot;, filename))?;
Ok(())
}