remove serde feature flag

.travis.yml

@@ -11,7 +11,7 @@ env:
 matrix:
   include:
     - rust: nightly
-      env: FEATURES=ipv6-iterator,ipv6-methods,serde,serde-derive
+      env: FEATURES=ipv6-iterator,ipv6-methods
 
 script:
   - cargo build --features $FEATURES --verbose

Cargo.toml

@@ -12,8 +12,8 @@ categories = ["network-programming", "os"]
 
 [dependencies]
 clippy = {version = "0.0.104", optional = true}
-serde = { version = ">=0.8.0, <2.0", optional = true }
-serde_derive = { version = ">=0.8.0, <2.0", optional = true }
+serde = ">=0.8.0, <2.0"
+serde_derive = ">=0.8.0, <2.0"
 
 [dev-dependencies]
 serde_json = "1.0"

src/ipv4.rs

@@ -2,7 +2,6 @@ use std::fmt;
 use std::net::Ipv4Addr;
 use std::str::FromStr;
 
-#[cfg(feature = "serde")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 
 use common::{cidr_parts, parse_addr, parse_prefix, IpNetworkError};
@@ -16,7 +15,6 @@ pub struct Ipv4Network {
     prefix: u8,
 }
 
-#[cfg(feature = "serde")]
 impl<'de> Deserialize<'de> for Ipv4Network {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -27,7 +25,6 @@ impl<'de> Deserialize<'de> for Ipv4Network {
     }
 }
 
-#[cfg(feature = "serde")]
 impl Serialize for Ipv4Network {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where

src/ipv6.rs

@@ -3,7 +3,6 @@ use std::fmt;
 use std::net::Ipv6Addr;
 use std::str::FromStr;
 
-#[cfg(feature = "serde")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 
 use common::{cidr_parts, parse_prefix, IpNetworkError};
@@ -18,7 +17,6 @@ pub struct Ipv6Network {
     prefix: u8,
 }
 
-#[cfg(feature = "serde")]
 impl<'de> Deserialize<'de> for Ipv6Network {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -29,7 +27,6 @@ impl<'de> Deserialize<'de> for Ipv6Network {
     }
 }
 
-#[cfg(feature = "serde")]
 impl Serialize for Ipv6Network {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where

src/lib.rs

@@ -8,9 +8,7 @@
 #![crate_type = "lib"]
 #![doc(html_root_url = "https://docs.rs/ipnetwork/0.12.8")]
 
-#[cfg(feature = "serde")]
 extern crate serde;
-#[cfg(feature = "serde")]
 #[macro_use]
 extern crate serde_derive;
 
@@ -29,9 +27,8 @@ pub use ipv6::{ipv6_mask_to_prefix, Ipv6Network};
 
 /// Represents a generic network range. This type can have two variants:
 /// the v4 and the v6 case.
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(untagged))]
-#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[serde(untagged)]
 pub enum IpNetwork {
     V4(Ipv4Network),
     V6(Ipv6Network),

tests/test_json.rs

@@ -1,8 +1,7 @@
-#[cfg(feature = "serde")]
 extern crate serde;
-#[cfg(feature = "serde")]
+
 extern crate serde_json;
-#[cfg(feature = "serde")]
+
 #[macro_use]
 extern crate serde_derive;
 
@@ -14,7 +13,6 @@ mod tests {
     use ipnetwork::{IpNetwork, Ipv4Network, Ipv6Network};
     use std::net::{Ipv4Addr, Ipv6Addr};
 
-    #[cfg(feature = "serde")]
     #[test]
     fn test_ipv4_json() {
         let json_string = r#"{"ipnetwork":"127.1.0.0/24"}"#;
@@ -32,7 +30,6 @@ mod tests {
         assert_eq!(::serde_json::to_string(&mystruct).unwrap(), json_string);
     }
 
-    #[cfg(feature = "serde")]
     #[test]
     fn test_ipv6_json() {
         let json_string = r#"{"ipnetwork":"::1/0"}"#;
@@ -53,7 +50,6 @@ mod tests {
         assert_eq!(::serde_json::to_string(&mystruct).unwrap(), json_string);
     }
 
-    #[cfg(feature = "serde")]
     #[test]
     fn test_ipnetwork_json() {
         let json_string = r#"{"ipnetwork":["127.1.0.0/24","::1/0"]}"#;