From 1dbd6689017efab66b8c530a194da70840839112 Mon Sep 17 00:00:00 2001
From: Ilia Konnov <ilia@sldr.xyz>
Date: Wed, 27 Jul 2022 02:02:44 +0300
Subject: [PATCH] serde: implement `AsSerde` for `FieldSet` (#2241)

## Motivation

I've wanted to serialize fieldset of current span.

## Solution

Expose already existing `SerializeFieldSet` for users by implementing `AsSerde` for `FieldSet`.
---
 tracing-serde/src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tracing-serde/src/lib.rs b/tracing-serde/src/lib.rs
index 3df9114f0a..f099853ec0 100644
--- a/tracing-serde/src/lib.rs
+++ b/tracing-serde/src/lib.rs
@@ -565,6 +565,14 @@ impl<'a> AsSerde<'a> for Level {
     }
 }
 
+impl<'a> AsSerde<'a> for FieldSet {
+    type Serializable = SerializeFieldSet<'a>;
+
+    fn as_serde(&'a self) -> Self::Serializable {
+        SerializeFieldSet(self)
+    }
+}
+
 impl<'a> self::sealed::Sealed for Event<'a> {}
 
 impl<'a> self::sealed::Sealed for Attributes<'a> {}
@@ -577,6 +585,8 @@ impl<'a> self::sealed::Sealed for Record<'a> {}
 
 impl<'a> self::sealed::Sealed for Metadata<'a> {}
 
+impl self::sealed::Sealed for FieldSet {}
+
 mod sealed {
     pub trait Sealed {}
 }