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|
use super::Error;
/// Serialization for TOML [values][crate::Value].
///
/// This structure implements serialization support for TOML to serialize an
/// arbitrary type to TOML. Note that the TOML format does not support all
/// datatypes in Rust, such as enums, tuples, and tuple structs. These types
/// will generate an error when serialized.
///
/// Currently a serializer always writes its output to an in-memory `String`,
/// which is passed in when creating the serializer itself.
///
/// # Examples
///
/// ```
/// use serde::Serialize;
///
/// #[derive(Serialize)]
/// struct Config {
/// database: Database,
/// }
///
/// #[derive(Serialize)]
/// struct Database {
/// ip: String,
/// port: Vec<u16>,
/// connection_max: u32,
/// enabled: bool,
/// }
///
/// let config = Config {
/// database: Database {
/// ip: "192.168.1.1".to_string(),
/// port: vec![8001, 8002, 8003],
/// connection_max: 5000,
/// enabled: false,
/// },
/// };
///
/// let value = serde::Serialize::serialize(
/// &config,
/// toml_edit::ser::ValueSerializer::new()
/// ).unwrap();
/// println!("{}", value)
/// ```
#[derive(Default)]
#[non_exhaustive]
pub struct ValueSerializer {}
impl ValueSerializer {
/// Creates a new serializer generate a TOML document.
pub fn new() -> Self {
Self {}
}
}
impl serde::ser::Serializer for ValueSerializer {
type Ok = crate::Value;
type Error = Error;
type SerializeSeq = super::SerializeValueArray;
type SerializeTuple = super::SerializeValueArray;
type SerializeTupleStruct = super::SerializeValueArray;
type SerializeTupleVariant = super::SerializeValueArray;
type SerializeMap = super::SerializeMap;
type SerializeStruct = super::SerializeMap;
type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
Ok(v.into())
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
Ok(v.into())
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
self.serialize_i64(v as i64)
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
let v: i64 = v
.try_into()
.map_err(|_err| Error::OutOfRange(Some("u64")))?;
self.serialize_i64(v)
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
self.serialize_f64(v as f64)
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
Ok(v.into())
}
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
let mut buf = [0; 4];
self.serialize_str(v.encode_utf8(&mut buf))
}
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
Ok(v.into())
}
fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
use serde::ser::Serialize;
value.serialize(self)
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(Error::UnsupportedNone)
}
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
where
T: serde::ser::Serialize,
{
value.serialize(self)
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(Error::UnsupportedType(Some("unit")))
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(Error::UnsupportedType(Some(name)))
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
self.serialize_str(variant)
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde::ser::Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: serde::ser::Serialize,
{
let value = value.serialize(self)?;
let mut table = crate::InlineTable::new();
table.insert(variant, value);
Ok(table.into())
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
let serializer = match len {
Some(len) => super::SerializeValueArray::with_capacity(len),
None => super::SerializeValueArray::new(),
};
Ok(serializer)
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
self.serialize_seq(Some(len))
}
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
self.serialize_seq(Some(len))
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
self.serialize_seq(Some(len))
}
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
let serializer = match len {
Some(len) => super::SerializeMap::table_with_capacity(len),
None => super::SerializeMap::table(),
};
Ok(serializer)
}
fn serialize_struct(
self,
name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
if name == toml_datetime::__unstable::NAME {
Ok(super::SerializeMap::datetime())
} else {
self.serialize_map(Some(len))
}
}
fn serialize_struct_variant(
self,
name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Err(Error::UnsupportedType(Some(name)))
}
}
|
