feat(impls): Add impls for num::{BigInt,BigUint,Complex,Ratio}

serde/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde"
-version = "0.6.1"
+version = "0.6.6"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "A generic serialization/deserialization framework"
@@ -14,3 +14,7 @@ num = "^0.1.27"
 
 [features]
 nightly = []
+num-impls = ["num-bigint", "num-complex", "num-rational"]
+num-bigint = ["num/bigint"]
+num-complex = ["num/complex"]
+num-rational = ["num/rational"]

serde/src/de/impls.rs

@@ -895,3 +895,87 @@ impl<T, E> Deserialize for Result<T, E> where T: Deserialize, E: Deserialize {
         deserializer.visit_enum("Result", VARIANTS, Visitor(PhantomData))
     }
 }
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "num-bigint")]
+impl Deserialize for ::num::bigint::BigInt {
+    fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
+        where D: Deserializer,
+    {
+        use ::num::Num;
+        use ::num::bigint::BigInt;
+
+        struct BigIntVisitor;
+
+        impl Visitor for BigIntVisitor {
+            type Value = BigInt;
+
+            fn visit_str<E>(&mut self, s: &str) -> Result<Self::Value, E>
+                where E: Error,
+            {
+                match BigInt::from_str_radix(s, 10) {
+                    Ok(v) => Ok(v),
+                    Err(err) => Err(Error::invalid_value(&err.to_string())),
+                }
+            }
+        }
+
+        deserializer.visit(BigIntVisitor)
+    }
+}
+
+#[cfg(feature = "num-bigint")]
+impl Deserialize for ::num::bigint::BigUint {
+    fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
+        where D: Deserializer,
+    {
+        use ::num::Num;
+        use ::num::bigint::BigUint;
+
+        struct BigUintVisitor;
+
+        impl Visitor for BigUintVisitor {
+            type Value = ::num::bigint::BigUint;
+
+            fn visit_str<E>(&mut self, s: &str) -> Result<Self::Value, E>
+                where E: Error,
+            {
+                match BigUint::from_str_radix(s, 10) {
+                    Ok(v) => Ok(v),
+                    Err(err) => Err(Error::invalid_value(&err.to_string())),
+                }
+            }
+        }
+
+        deserializer.visit(BigUintVisitor)
+    }
+}
+
+#[cfg(feature = "num-complex")]
+impl<T> Deserialize for ::num::complex::Complex<T>
+    where T: Deserialize + Clone + ::num::Num
+{
+    fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
+        where D: Deserializer,
+    {
+        let (re, im) = try!(Deserialize::deserialize(deserializer));
+        Ok(::num::complex::Complex::new(re, im))
+    }
+}
+
+#[cfg(feature = "num-rational")]
+impl<T> Deserialize for ::num::rational::Ratio<T>
+    where T: Deserialize + Clone + ::num::Integer + PartialOrd
+{
+    fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
+        where D: Deserializer,
+    {
+        let (numer, denom) = try!(Deserialize::deserialize(deserializer));
+        if denom == ::num::Zero::zero() {
+            Err(Error::invalid_value("denominator is zero"))
+        } else {
+            Ok(::num::rational::Ratio::new_raw(numer, denom))
+        }
+    }
+}

serde/src/de/mod.rs

@@ -21,6 +21,11 @@ pub trait Error: Sized {
         Error::syntax("incorrect type")
     }
 
+    /// Raised when a `Deserialize` was passed an incorrect value.
+    fn invalid_value(msg: &str) -> Self {
+        Error::syntax(msg)
+    }
+
     /// Raised when a `Deserialize` type unexpectedly hit the end of the stream.
     fn end_of_stream() -> Self;
 

serde/src/ser/impls.rs

@@ -700,3 +700,37 @@ impl<T> Serialize for NonZero<T> where T: Serialize + Zeroable {
         (**self).serialize(serializer)
     }
 }
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "num-bigint")]
+impl Serialize for ::num::bigint::BigInt {
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        self.to_str_radix(10).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "num-bigint")]
+impl Serialize for ::num::bigint::BigUint {
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        self.to_str_radix(10).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "num-complex")]
+impl<T> Serialize for ::num::complex::Complex<T>
+    where T: Serialize + Clone + ::num::Num
+{
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        (&self.re, &self.im).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "num-rational")]
+impl<T> Serialize for ::num::rational::Ratio<T>
+    where T: Serialize + Clone + ::num::Integer + PartialOrd
+{
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        (self.numer(), self.denom()).serialize(serializer)
+    }
+}