From 9b7cf64e57b7181caf51a3ea867cf5021ab687f0 Mon Sep 17 00:00:00 2001
From: Prasanna Loganathar <pvl@prasannavl.com>
Date: Thu, 10 Oct 2019 01:29:56 +0530
Subject: [PATCH 1/2] add slightly improved main example

A fairly common `print_error` implementation as a part of the main example.
---
 README.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/README.md b/README.md
index 67437cb0..63c4d677 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,21 @@ fn process_data() -> Result<()> {
 fn unpack_config(data: &str) -> &str {
     "/some/path/that/does/not/exist"
 }
+
+fn main() {
+    if let Err(e) = process_data() {
+        print_error(&e);
+    }
+}
+
+fn print_error(e: &dyn std::error::Error) {
+    eprintln!("error: {}", e);
+    let mut cause = e.source();
+    while let Some(e) = cause {
+        eprintln!("caused by: {}", e);
+        cause = e.source();
+    }
+}
 ```
 
 Please see [the documentation][Doc] and the [user's guide][Guide] for

From 5a499242670cfd802505d26028cb911ca8891c7c Mon Sep 17 00:00:00 2001
From: Prasanna Loganathar <pvl@prasannavl.com>
Date: Thu, 10 Oct 2019 08:33:23 +0530
Subject: [PATCH 2/2] update readme to use ErrorCompat::iter_chain

Blocked on: https://github.com/shepmaster/snafu/issues/187
---
 README.md | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/README.md b/README.md
index 63c4d677..c97e3911 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ SNAFU is a library to easily assign underlying errors into
 domain-specific errors while adding context.
 
 ```rust
-use snafu::{ResultExt, Snafu};
+use snafu::{ResultExt, Snafu, ErrorCompat};
 use std::{fs, io, path::PathBuf};
 
 #[derive(Debug, Snafu)]
@@ -38,16 +38,10 @@ fn unpack_config(data: &str) -> &str {
 
 fn main() {
     if let Err(e) = process_data() {
-        print_error(&e);
-    }
-}
-
-fn print_error(e: &dyn std::error::Error) {
-    eprintln!("error: {}", e);
-    let mut cause = e.source();
-    while let Some(e) = cause {
-        eprintln!("caused by: {}", e);
-        cause = e.source();
+        eprintln!("error: {}", &e);
+        for cause in ErrorCompat::iter_chain(&e) {
+            eprintln!("caused by: {}", cause);
+        }
     }
 }
 ```