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@ -1,9 +1,11 @@
<!DOCTYPE HTML>
<html lang="en" class="sidebar-visible no-js">
<html lang="en" class="sidebar-visible no-js light">
<head>
<!-- Book generated using mdBook -->
<meta charset="UTF-8">
<title>chainerror - chainerror</title>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<meta name="description" content="A tutorial for the chainerror rust crate.">
<meta name="viewport" content="width=device-width, initial-scale=1">
@ -30,11 +32,11 @@
</head>
<body class="light">
<body>
<!-- Provide site root to javascript -->
<script type="text/javascript">
var path_to_root = "";
var default_theme = "light";
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "light" : "light";
</script>
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@ -56,10 +58,13 @@
<!-- Set the theme before any content is loaded, prevents flash -->
<script type="text/javascript">
var theme;
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
if (theme === null || theme === undefined) { theme = default_theme; }
document.body.className = theme;
document.querySelector('html').className = theme + ' js';
var html = document.querySelector('html');
html.classList.remove('no-js')
html.classList.remove('light')
html.classList.add(theme);
html.classList.add('js');
</script>
<!-- Hide / unhide sidebar before it is displayed -->
@ -75,7 +80,10 @@
</script>
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
<ol class="chapter"><li class="affix"><a href="index.html">chainerror</a></li><li><a href="tutorial1.html"><strong aria-hidden="true">1.</strong> Simple String Errors</a></li><li><a href="tutorial2.html"><strong aria-hidden="true">2.</strong> Simple Chained String Errors</a></li><li><a href="tutorial3.html"><strong aria-hidden="true">3.</strong> Mapping Errors</a></li><li><a href="tutorial4.html"><strong aria-hidden="true">4.</strong> Saving coding chars</a></li><li><a href="tutorial5.html"><strong aria-hidden="true">5.</strong> The source() of Errors</a></li><li><a href="tutorial6.html"><strong aria-hidden="true">6.</strong> Downcast the Errors</a></li><li><a href="tutorial7.html"><strong aria-hidden="true">7.</strong> The root cause of all Errors</a></li><li><a href="tutorial8.html"><strong aria-hidden="true">8.</strong> Finding an Error cause</a></li><li><a href="tutorial9.html"><strong aria-hidden="true">9.</strong> Selective Error Handling</a></li><li><a href="tutorial10.html"><strong aria-hidden="true">10.</strong> ErrorKind to the rescue</a></li><li><a href="tutorial11.html"><strong aria-hidden="true">11.</strong> Debug for the ErrorKind</a></li><li><a href="tutorial12.html"><strong aria-hidden="true">12.</strong> Deref for the ErrorKind</a></li><li><a href="tutorial13.html"><strong aria-hidden="true">13.</strong> Writing a library</a></li><li class="affix"><a href="end.html">The End</a></li></ol>
<div id="sidebar-scrollbox" class="sidebar-scrollbox">
<ol class="chapter"><li class="expanded affix "><a href="index.html" class="active">chainerror</a></li><li class="expanded "><a href="tutorial1.html"><strong aria-hidden="true">1.</strong> Simple String Errors</a></li><li class="expanded "><a href="tutorial2.html"><strong aria-hidden="true">2.</strong> Simple Chained String Errors</a></li><li class="expanded "><a href="tutorial3.html"><strong aria-hidden="true">3.</strong> Mapping Errors</a></li><li class="expanded "><a href="tutorial4.html"><strong aria-hidden="true">4.</strong> Saving coding chars</a></li><li class="expanded "><a href="tutorial5.html"><strong aria-hidden="true">5.</strong> The source() of Errors</a></li><li class="expanded "><a href="tutorial6.html"><strong aria-hidden="true">6.</strong> Downcast the Errors</a></li><li class="expanded "><a href="tutorial7.html"><strong aria-hidden="true">7.</strong> The root cause of all Errors</a></li><li class="expanded "><a href="tutorial8.html"><strong aria-hidden="true">8.</strong> Finding an Error cause</a></li><li class="expanded "><a href="tutorial9.html"><strong aria-hidden="true">9.</strong> Selective Error Handling</a></li><li class="expanded "><a href="tutorial10.html"><strong aria-hidden="true">10.</strong> ErrorKind to the rescue</a></li><li class="expanded "><a href="tutorial11.html"><strong aria-hidden="true">11.</strong> Debug for the ErrorKind</a></li><li class="expanded "><a href="tutorial12.html"><strong aria-hidden="true">12.</strong> Deref for the ErrorKind</a></li><li class="expanded "><a href="tutorial13.html"><strong aria-hidden="true">13.</strong> Writing a library</a></li><li class="expanded "><a href="tutorial14.html"><strong aria-hidden="true">14.</strong> Going back to std</a></li><li class="expanded affix "><a href="end.html">The End</a></li></ol>
</div>
<div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
</nav>
<div id="page-wrapper" class="page-wrapper">
@ -105,7 +113,7 @@
</div>
<h1 class="menu-title">chainerror</h1>
<h1 class="menu-title">chainerror</h1>
<div class="right-buttons">
<a href="print.html" title="Print this book" aria-label="Print this book">
@ -140,7 +148,7 @@
<div id="content" class="content">
<main>
<a class="header" href="#chainerror" id="chainerror"><h1>chainerror</h1></a>
<h1><a class="header" href="#chainerror" id="chainerror">chainerror</a></h1>
<p><a href="https://travis-ci.org/haraldh/chainerror"><img src="https://travis-ci.org/haraldh/chainerror.svg?branch=master" alt="Build Status" /></a>
<a href="https://crates.io/crates/chainerror"><img src="https://img.shields.io/crates/v/chainerror.svg" alt="Crate" /></a>
<a href="https://docs.rs/chainerror/"><img src="https://img.shields.io/badge/api-rustdoc-blue.svg" alt="Rust Documentation" /></a></p>
@ -153,7 +161,7 @@ It encapsulates all types, which have <code>Display + Debug</code> and can store
<p>Debug information is worth it!</p>
<p>Now continue reading the
<a href="https://haraldh.github.io/chainerror/tutorial1.html">Tutorial</a></p>
<a class="header" href="#example" id="example"><h2>Example:</h2></a>
<h2><a class="header" href="#example" id="example">Example:</a></h2>
<p>Output:</p>
<pre><code>$ cargo run -q --example example
Main Error Report: func1 error calling func2
@ -178,12 +186,12 @@ use std::error::Error;
use std::io;
use std::result::Result;
fn do_some_io() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {
fn do_some_io() -&gt; Result&lt;(), Box&lt;Error + Send + Sync&gt;&gt; {
Err(io::Error::from(io::ErrorKind::NotFound))?;
Ok(())
}
fn func3() -&gt; Result&lt;(), Box&lt;Error&gt;&gt; {
fn func3() -&gt; Result&lt;(), Box&lt;Error + Send + Sync&gt;&gt; {
let filename = &quot;foo.txt&quot;;
do_some_io().map_err(mstrerr!(&quot;Error reading '{}'&quot;, filename))?;
Ok(())
@ -246,7 +254,7 @@ fn main() {
}
</code></pre>
<a class="header" href="#features" id="features"><h2>Features</h2></a>
<h2><a class="header" href="#features" id="features">Features</a></h2>
<p><code>no-fileline</code>
: completely turn off storing filename and line</p>
<p><code>display-cause</code>
@ -261,6 +269,10 @@ fn main() {
<a rel="next" href="tutorial1.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
<i class="fa fa-angle-right"></i>
</a>
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</nav>
@ -271,6 +283,10 @@ fn main() {
<a href="tutorial1.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
<i class="fa fa-angle-right"></i>
</a>
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@ -280,6 +296,14 @@ fn main() {
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