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//! Serialization support for [`Datetime`][crate::Datetime]
/// Check if serializing a [`Datetime`][crate::Datetime]
pub fn is_datetime(name: &'static str) -> bool {
crate::datetime::is_datetime(name)
}
/// See [`DatetimeSerializer`]
#[derive(Debug)]
#[non_exhaustive]
pub enum SerializerError {
/// Unsupported datetime format
InvalidFormat(crate::DatetimeParseError),
/// Unsupported serialization protocol
InvalidProtocol,
}
impl serde_core::ser::Error for SerializerError {
fn custom<T>(_msg: T) -> Self
where
T: core::fmt::Display,
{
Self::InvalidProtocol
}
}
impl core::fmt::Display for SerializerError {
fn fmt(&self, formatter: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
match self {
Self::InvalidFormat(e) => e.fmt(formatter),
Self::InvalidProtocol => "invalid serialization protocol".fmt(formatter),
}
}
}
#[cfg(feature = "std")]
impl std::error::Error for SerializerError {}
#[cfg(all(not(feature = "std"), feature = "serde"))]
impl serde_core::de::StdError for SerializerError {}
/// Serializer / format support for emitting [`Datetime`][crate::Datetime]
#[derive(Default)]
pub struct DatetimeSerializer {
value: Option<crate::Datetime>,
}
impl DatetimeSerializer {
/// Create a serializer to emit [`Datetime`][crate::Datetime]
pub fn new() -> Self {
Self { value: None }
}
/// See [`serde_core::ser::SerializeStruct::serialize_field`]
pub fn serialize_field<T>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), SerializerError>
where
T: serde_core::ser::Serialize + ?Sized,
{
if key == crate::datetime::FIELD {
self.value = Some(value.serialize(DatetimeFieldSerializer::default())?);
}
Ok(())
}
/// See [`serde_core::ser::SerializeStruct::end`]
pub fn end(self) -> Result<crate::Datetime, SerializerError> {
self.value.ok_or(SerializerError::InvalidProtocol)
}
}
#[derive(Default)]
struct DatetimeFieldSerializer {}
impl serde_core::ser::Serializer for DatetimeFieldSerializer {
type Ok = crate::Datetime;
type Error = SerializerError;
type SerializeSeq = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeStruct = serde_core::ser::Impossible<Self::Ok, Self::Error>;
type SerializeStructVariant = serde_core::ser::Impossible<Self::Ok, Self::Error>;
fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
v.parse::<crate::Datetime>()
.map_err(SerializerError::InvalidFormat)
}
fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_some<T>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where
T: serde_core::ser::Serialize + ?Sized,
{
Err(SerializerError::InvalidProtocol)
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_newtype_struct<T>(
self,
_name: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde_core::ser::Serialize + ?Sized,
{
Err(SerializerError::InvalidProtocol)
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde_core::ser::Serialize + ?Sized,
{
Err(SerializerError::InvalidProtocol)
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Err(SerializerError::InvalidProtocol)
}
}