From f27d604d93ce583d4404e1874664e08382ea2f00 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Fri, 6 Jan 2023 23:42:28 +0800
Subject: Save before system restart.

I am about to re-start my system, so I save before any crashes
happen.
---
 graph/src/error.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'graph/src/error.rs')

diff --git a/graph/src/error.rs b/graph/src/error.rs
index bf2714b..ce45acc 100644
--- a/graph/src/error.rs
+++ b/graph/src/error.rs
@@ -18,6 +18,8 @@ pub enum Error {
     /// The graph does not permit duplicate edges but encounters a
     /// repeated edge.
     DuplicatedEdge(usize, usize),
+    /// The source node has no room to add a new edge.
+    FullNode(usize),
 }
 
 impl Display for Error {
@@ -35,6 +37,7 @@ impl Display for Error {
                     "No duplicate edges permitted, but found one from {source} to {target}"
                 )
             }
+            Error::FullNode(index) => write!(f, "the node {index} has no room for new edges"),
         }
     }
 }
-- 
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