doc: Call out feature gated functions/modules/etc in docs

Like in https://docs.rs/tokio/0.2.6/tokio/index.html#modules

Author: Marwes

src/client.rs

@@ -66,6 +66,7 @@ impl Client {
     ///
     /// This requires the `tokio-executor` feature as it uses the default tokio executor.
     #[cfg(feature = "tokio-rt-core")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "tokio-rt-core")))]
     pub async fn get_multiplexed_tokio_connection(
         &self,
     ) -> RedisResult<crate::aio::MultiplexedConnection> {

src/commands.rs

@@ -862,6 +862,7 @@ implement_commands! {
     /// }
     /// ```
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_add<K: ToRedisArgs, M: ToRedisArgs>(key: K, members: M) {
         cmd("GEOADD").arg(key).arg(members)
     }
@@ -898,6 +899,7 @@ implement_commands! {
     /// }
     /// ```
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_dist<K: ToRedisArgs, M1: ToRedisArgs, M2: ToRedisArgs>(
         key: K,
         member1: M1,
@@ -931,6 +933,7 @@ implement_commands! {
     /// }
     /// ```
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_hash<K: ToRedisArgs, M: ToRedisArgs>(key: K, members: M) {
         cmd("GEOHASH").arg(key).arg(members)
     }
@@ -959,6 +962,7 @@ implement_commands! {
     /// }
     /// ```
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_pos<K: ToRedisArgs, M: ToRedisArgs>(key: K, members: M) {
         cmd("GEOPOS").arg(key).arg(members)
     }
@@ -983,6 +987,7 @@ implement_commands! {
     /// }
     /// ```
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_radius<K: ToRedisArgs>(
         key: K,
         longitude: f64,
@@ -1003,6 +1008,7 @@ implement_commands! {
     /// Retrieve members selected by distance with the center of `member`. The
     /// member itself is always contained in the results.
     #[cfg(feature = "geospatial")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
     fn geo_radius_by_member<K: ToRedisArgs, M: ToRedisArgs>(
         key: K,
         member: M,

src/lib.rs

@@ -373,6 +373,7 @@ mod macros;
 pub mod aio;
 
 #[cfg(feature = "geospatial")]
+#[cfg_attr(docsrs, doc(cfg(feature = "geospatial")))]
 pub mod geo;
 
 mod client;