Add strum::ParseError variant to DeserializationError

Cargo.toml

@@ -23,6 +23,7 @@ ruma-identifiers = { version = "0.14.1", optional = true }
 serde = { version = "1.0.104", features = ["derive"], optional = true }
 serde_json = "1.0.47"
 serde_urlencoded = "0.6.1"
+strum = "0.17.1"
 url = { version = "2.1.1", optional = true }
 
 [dev-dependencies]

ruma-api-macros/src/api/request.rs

@@ -353,11 +353,7 @@ impl ToTokens for Request {
 
             quote! {
                 /// Data in the request path.
-                #[derive(
-                    Debug,
-                    ruma_api::exports::serde::Deserialize,
-                    ruma_api::exports::serde::Serialize,
-                )]
+                #[derive(Debug)]
                 struct RequestPath {
                     #(#fields),*
                 }

src/error.rs

@@ -194,6 +194,9 @@ pub enum DeserializationError {
     Json(serde_json::Error),
     Query(serde_urlencoded::de::Error),
     Ident(ruma_identifiers::Error),
+    // String <> Enum conversion failed. This can currently only happen in path
+    // segment deserialization
+    Strum(strum::ParseError),
 }
 
 impl Display for DeserializationError {
@@ -202,6 +205,7 @@ impl Display for DeserializationError {
             DeserializationError::Json(err) => Display::fmt(err, f),
             DeserializationError::Query(err) => Display::fmt(err, f),
             DeserializationError::Ident(err) => Display::fmt(err, f),
+            DeserializationError::Strum(err) => Display::fmt(err, f),
         }
     }
 }
@@ -227,6 +231,13 @@ impl From<ruma_identifiers::Error> for DeserializationError {
     }
 }
 
+#[doc(hidden)]
+impl From<strum::ParseError> for DeserializationError {
+    fn from(err: strum::ParseError) -> Self {
+        Self::Strum(err)
+    }
+}
+
 #[doc(hidden)]
 impl From<std::convert::Infallible> for DeserializationError {
     fn from(err: std::convert::Infallible) -> Self {