fix(toml): Support serializing i128/u128

Author: epage

crates/toml/src/ser/value/mod.rs

@@ -116,6 +116,11 @@ impl<'d> serde_core::ser::Serializer for ValueSerializer<'d> {
         Ok(self.dst)
     }
 
+    fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> {
+        self.dst.value(v)?;
+        Ok(self.dst)
+    }
+
     fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
         self.dst.value(v)?;
         Ok(self.dst)
@@ -136,6 +141,11 @@ impl<'d> serde_core::ser::Serializer for ValueSerializer<'d> {
         Ok(self.dst)
     }
 
+    fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> {
+        self.dst.value(v)?;
+        Ok(self.dst)
+    }
+
     fn serialize_f32(self, mut v: f32) -> Result<Self::Ok, Self::Error> {
         // Discard sign of NaN when serialized using Serde.
         //

crates/toml/tests/serde/general.rs

@@ -1246,13 +1246,21 @@ a_b = {value}
     // Through a string equivalent
     println!("to_string");
     assert_data_eq!(
-        crate::to_string(&literal).unwrap_err().to_string(),
-        str!["i128 is not supported"].raw()
+        crate::to_string(&literal).unwrap(),
+        str![[r#"
+a_b = -170141183460469231731687303715884105728
+
+"#]]
+        .raw()
     );
     println!("to_string_pretty");
     assert_data_eq!(
-        crate::to_string_pretty(&literal).unwrap_err().to_string(),
-        str!["i128 is not supported"].raw()
+        crate::to_string_pretty(&literal).unwrap(),
+        str![[r#"
+a_b = -170141183460469231731687303715884105728
+
+"#]]
+        .raw()
     );
     println!("literal, from_str(toml)");
     assert_data_eq!(
@@ -1301,13 +1309,21 @@ a_b = {value}
     // Through a string equivalent
     println!("to_string");
     assert_data_eq!(
-        crate::to_string(&literal).unwrap_err().to_string(),
-        str!["i128 is not supported"].raw()
+        crate::to_string(&literal).unwrap(),
+        str![[r#"
+a_b = 170141183460469231731687303715884105727
+
+"#]]
+        .raw()
     );
     println!("to_string_pretty");
     assert_data_eq!(
-        crate::to_string_pretty(&literal).unwrap_err().to_string(),
-        str!["i128 is not supported"].raw()
+        crate::to_string_pretty(&literal).unwrap(),
+        str![[r#"
+a_b = 170141183460469231731687303715884105727
+
+"#]]
+        .raw()
     );
     println!("literal, from_str(toml)");
     assert_data_eq!(
@@ -1356,13 +1372,21 @@ a_b = {value}
     // Through a string equivalent
     println!("to_string");
     assert_data_eq!(
-        crate::to_string(&literal).unwrap_err().to_string(),
-        str!["u128 is not supported"].raw()
+        crate::to_string(&literal).unwrap(),
+        str![[r#"
+a_b = 340282366920938463463374607431768211455
+
+"#]]
+        .raw()
     );
     println!("to_string_pretty");
     assert_data_eq!(
-        crate::to_string_pretty(&literal).unwrap_err().to_string(),
-        str!["u128 is not supported"].raw()
+        crate::to_string_pretty(&literal).unwrap(),
+        str![[r#"
+a_b = 340282366920938463463374607431768211455
+
+"#]]
+        .raw()
     );
     println!("literal, from_str(toml)");
     assert_data_eq!(