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-rw-r--r--src/ser/key.rs292
1 files changed, 292 insertions, 0 deletions
diff --git a/src/ser/key.rs b/src/ser/key.rs
new file mode 100644
index 0000000..a26c563
--- /dev/null
+++ b/src/ser/key.rs
@@ -0,0 +1,292 @@
+use serde::{Serialize, Serializer};
+use ser::Error;
+use std::borrow::Cow;
+use std::str;
+
+pub struct MapKeySerializer<'key>(&'key mut Option<Cow<'static, str>>);
+
+impl<'key> MapKeySerializer<'key> {
+ pub fn new(output: &'key mut Option<Cow<'static, str>>) -> Self {
+ MapKeySerializer(output)
+ }
+
+ fn set_key<T>(&mut self, key: T) -> Result<(), Error>
+ where T: Into<Cow<'static, str>>
+ {
+ *self.0 = Some(key.into());
+ Ok(())
+ }
+}
+
+impl<'key> Serializer for MapKeySerializer<'key> {
+ type Error = Error;
+ type SeqState = ();
+ type TupleState = ();
+ type TupleStructState = ();
+ type TupleVariantState = ();
+ type MapState = ();
+ type StructState = ();
+ type StructVariantState = ();
+
+ fn serialize_bool(&mut self, _v: bool) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_isize(&mut self, v: isize) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_i8(&mut self, v: i8) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_i16(&mut self, v: i16) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_i32(&mut self, v: i32) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_i64(&mut self, v: i64) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_usize(&mut self, v: usize) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_u8(&mut self, v: u8) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_u16(&mut self, v: u16) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_u32(&mut self, v: u32) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_u64(&mut self, v: u64) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_f32(&mut self, v: f32) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_f64(&mut self, v: f64) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_char(&mut self, v: char) -> Result<(), Error> {
+ self.set_key(v.to_string())
+ }
+
+ fn serialize_str(&mut self, value: &str) -> Result<(), Error> {
+ self.set_key(String::from(value))
+ }
+
+ fn serialize_bytes(&mut self, value: &[u8]) -> Result<(), Error> {
+ match str::from_utf8(value) {
+ Ok(value) => self.set_key(String::from(value)),
+ Err(err) => Err(Error::Utf8(err)),
+ }
+ }
+
+ fn serialize_unit(&mut self) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_unit_struct(
+ &mut self, name: &'static str)
+ -> Result<(), Error> {
+ self.set_key(name)
+ }
+
+ fn serialize_unit_variant(
+ &mut self,
+ _name: &'static str,
+ _variant_index: usize,
+ variant: &'static str)
+ -> Result<(), Error> {
+ self.set_key(variant)
+ }
+
+ fn serialize_newtype_struct<T>(
+ &mut self, _name: &'static str, value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ value.serialize(self)
+ }
+
+ fn serialize_newtype_variant<T>(
+ &mut self,
+ _name: &'static str,
+ _variant_index: usize,
+ _variant: &'static str,
+ _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_none(&mut self) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_some<T>(&mut self, _value: T) -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_seq(&mut self, _len: Option<usize>) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_seq_elt<T>(
+ &mut self, _state: &mut (), _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_seq_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_seq_fixed_size(&mut self, _size: usize) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple(&mut self, _len: usize) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_elt<T>(
+ &mut self, _state: &mut (), _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_struct(
+ &mut self, _name: &'static str, _len: usize)
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_struct_elt<T>(
+ &mut self, _state: &mut (), _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_struct_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_variant(
+ &mut self,
+ _name: &'static str,
+ _variant_index: usize,
+ _variant: &'static str,
+ _len: usize)
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_variant_elt<T>(
+ &mut self, _state: &mut (), _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_tuple_variant_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_map(&mut self, _len: Option<usize>) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_map_key<T>(
+ &mut self, _state: &mut (), _key: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_map_value<T>(
+ &mut self, _state: &mut (), _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_map_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct(
+ &mut self, _name: &'static str, _len: usize)
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct_elt<T>(
+ &mut self, _state: &mut (), _key: &'static str, _value: T)
+ -> Result<(), Error>
+ where T: Serialize
+ {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct_end(&mut self, _state: ()) -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct_variant(
+ &mut self,
+ _name: &'static str,
+ _variant_index: usize,
+ _variant: &'static str,
+ _len: usize)
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct_variant_elt<T>(
+ &mut self, _state: &mut (), _key: &'static str, _value: T)
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+
+ fn serialize_struct_variant_end(
+ &mut self, _state: ())
+ -> Result<(), Error> {
+ Err(Error::unsupported_key())
+ }
+}
+
+impl Error {
+ fn unsupported_key() -> Self {
+ Error::Custom("unsupported key".into())
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-31 23:43:56 +0000