deserialize duration from floats

1 files changed, 28 insertions, 0 deletions

diff --git a/src/serde_duration.rs b/src/serde_duration.rs
new file mode 100644
index 0000000..50076b0
--- /dev/null
+++ b/src/serde_duration.rs
@@ -0,0 +1,28 @@
+use serde::de::{ Visitor, Error, Deserializer };
+use std::time::Duration;
+use std::fmt;
+
+pub fn deserialize_duration<'de, D>(deserializer: D) -> Result<Duration, D::Error>
+where
+    D: Deserializer<'de>
+{
+    struct DurationVisitor;
+
+    impl<'de> Visitor<'de> for DurationVisitor {
+        type Value = Duration;
+    
+        fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
+            write!(f, "duration in secs")
+        }
+    
+        fn visit_f32<E: Error> (self, v: f32) -> Result<Self::Value, E> {
+            Ok(Duration::from_secs_f32(v))
+        }
+    
+        fn visit_f64<E: Error> (self, v: f64) -> Result<Self::Value, E> {
+            Ok(Duration::from_secs_f64(v))
+        }
+    }
+    
+    deserializer.deserialize_any(DurationVisitor)
+}