From e1277f07f4c273630ecd936b86102dc8461e19c2 Mon Sep 17 00:00:00 2001
From: c-to-the-l <39165068+c-to-the-l@users.noreply.github.com>
Date: Tue, 23 Jan 2024 03:23:16 +0000
Subject: [PATCH] fix serialize feature flag

---
 src/lib.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 65872a7..885b522 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -53,6 +53,9 @@ extern crate serde_derive;
 
 use serde::de::*;
 use serde::Deserializer;
+#[cfg(feature = "serialize")]
+use serde::{Serialize, Serializer};
+
 use std::fmt;
 use std::io;
 
@@ -210,6 +213,20 @@ impl fmt::Display for Mode {
     }
 }
 
+#[cfg(feature = "serialize")]
+impl Serialize for Mode {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self {
+            Mode::NoFix => serializer.serialize_i32(1),
+            Mode::Fix2d => serializer.serialize_i32(2),
+            Mode::Fix3d => serializer.serialize_i32(3),
+        }
+    }
+}
+
 fn mode_from_str<'de, D>(deserializer: D) -> Result<Mode, D::Error>
 where
     D: Deserializer<'de>,