From 1507527175beca9486ae3b7536bf3872dd7b4555 Mon Sep 17 00:00:00 2001
From: Nolan Darilek <nolan@thewordnerd.info>
Date: Mon, 24 Aug 2020 16:44:00 -0500
Subject: [PATCH] Add `Default` implementation for `Features` so backends need
 only specify features they actually support.

---
 src/backends/appkit.rs |  2 +-
 src/backends/tolk.rs   |  5 +----
 src/lib.rs             | 12 ++++++++++++
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/backends/appkit.rs b/src/backends/appkit.rs
index 6bfbf06..dcc68d9 100644
--- a/src/backends/appkit.rs
+++ b/src/backends/appkit.rs
@@ -95,9 +95,9 @@ impl Backend for AppKit {
         Features {
             stop: true,
             rate: true,
-            pitch: false,
             volume: true,
             is_speaking: true,
+            ..Default::default(),
         }
     }
 
diff --git a/src/backends/tolk.rs b/src/backends/tolk.rs
index 176fdb7..b56a9b0 100644
--- a/src/backends/tolk.rs
+++ b/src/backends/tolk.rs
@@ -22,10 +22,7 @@ impl Backend for Tolk {
     fn supported_features(&self) -> Features {
         Features {
             stop: true,
-            rate: false,
-            pitch: false,
-            volume: false,
-            is_speaking: false,
+            ..Default::default(),
         }
     }
 
diff --git a/src/lib.rs b/src/lib.rs
index b64c86b..56b9f32 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,6 +48,18 @@ pub struct Features {
     pub is_speaking: bool,
 }
 
+impl Default for Features {
+    fn default() -> Self {
+        Self {
+            stop: false,
+            rate: false,
+            pitch: false,
+            volume: false,
+            is_speaking: false,
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum Error {
     #[error("IO error: {0}")]