Add result feature to serde and serde_core

serde/Cargo.toml

@@ -28,7 +28,7 @@ doc-scrape-examples = false
 features = ["derive", "rc"]
 
 [package.metadata.docs.rs]
-features = ["derive", "rc", "unstable"]
+features = ["derive", "rc", "result", "unstable"]
 targets = ["x86_64-unknown-linux-gnu"]
 rustdoc-args = ["--cfg", "doc_cfg", "--generate-link-to-definition"]
 
@@ -44,7 +44,7 @@ serde_derive = { version = "=1.0.204", path = "../serde_derive" }
 ### FEATURES #################################################################
 
 [features]
-default = ["std"]
+default = ["std", "result"]
 
 # Provide derive(Serialize, Deserialize) macros.
 derive = ["serde_derive"]
@@ -68,3 +68,8 @@ alloc = ["serde_core/alloc"]
 # does not preserve identity and may result in multiple copies of the same data.
 # Be sure that this is what you want before enabling this feature.
 rc = ["serde_core/rc"]
+
+# Provide impls for Result<T, E>. Enabling these impls allows for serialization
+# and deserialization of Result types, which may be useful in certain contexts
+# but could lead to confusion if ? or unwrap are overused.
+result = ["serde_core/result"]

serde_core/Cargo.toml

@@ -34,7 +34,7 @@ rustdoc-args = ["--cfg", "doc_cfg", "--generate-link-to-definition"]
 ### FEATURES #################################################################
 
 [features]
-default = ["std"]
+default = ["std", "result"]
 
 
 # Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
@@ -56,3 +56,8 @@ alloc = []
 # does not preserve identity and may result in multiple copies of the same data.
 # Be sure that this is what you want before enabling this feature.
 rc = []
+
+# Provide impls for Result<T, E>. Enabling these impls allows for serialization
+# and deserialization of Result types, which may be useful in certain contexts
+# but could lead to confusion if ? or unwrap are overused.
+result = []

serde_core/src/de/impls.rs

@@ -3003,6 +3003,8 @@ where
 
 ////////////////////////////////////////////////////////////////////////////////
 
+#[cfg(feature = "result")]
+#[cfg_attr(docsrs, doc(cfg(feature = "result")))]
 impl<'de, T, E> Deserialize<'de> for Result<T, E>
 where
     T: Deserialize<'de>,

serde_core/src/ser/impls.rs

@@ -713,6 +713,8 @@ where
 
 ////////////////////////////////////////////////////////////////////////////////
 
+#[cfg(feature = "result")]
+#[cfg_attr(docsrs, doc(cfg(feature = "result")))]
 impl<T, E> Serialize for Result<T, E>
 where
     T: Serialize,