From 5b3fa958b8f62e82b39d56ed80bb30886c17a424 Mon Sep 17 00:00:00 2001
From: maddymakesgames <madelinemakesgames@gmail.com>
Date: Wed, 3 Apr 2024 17:33:59 -0400
Subject: [PATCH] add Error and Display impls for LoadError

---
 saphyr/src/yaml.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/saphyr/src/yaml.rs b/saphyr/src/yaml.rs
index 3af4bb3..abe2174 100644
--- a/saphyr/src/yaml.rs
+++ b/saphyr/src/yaml.rs
@@ -186,6 +186,26 @@ impl From<std::io::Error> for LoadError {
     }
 }
 
+impl std::error::Error for LoadError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        Some(match &self {
+            LoadError::IO(e) => e,
+            LoadError::Scan(e) => e,
+            LoadError::Decode(_) => return None,
+        })
+    }
+}
+
+impl std::fmt::Display for LoadError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            LoadError::IO(e) => e.fmt(f),
+            LoadError::Scan(e) => e.fmt(f),
+            LoadError::Decode(e) => e.fmt(f),
+        }
+    }
+}
+
 impl YamlLoader {
     fn insert_new_node(&mut self, node: (Yaml, usize)) {
         // valid anchor id starts from 1