toml::ser

Struct ValueSerializer

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#[non_exhaustive]
pub struct ValueSerializer<'d> { /* private fields */ }
Expand description

Serialization for TOML values.

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 mut value = String::new();
serde::Serialize::serialize(
    &config,
    toml::ser::ValueSerializer::new(&mut value)
).unwrap();
println!("{}", value)

Implementations§

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impl<'d> ValueSerializer<'d>

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pub fn new(dst: &'d mut String) -> Self

Creates a new serializer which will emit TOML into the buffer provided.

The serializer can then be used to serialize a type after which the data will be present in dst.

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impl<'d> Serializer for ValueSerializer<'d>

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type Ok = ()

The output type produced by this Serializer during successful serialization. Most serializers that produce text or binary output should set Ok = () and serialize into an io::Write or buffer contained within the Serializer instance. Serializers that build in-memory data structures may be simplified by using Ok to propagate the data structure around.
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type Error = Error

The error type when some error occurs during serialization.
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type SerializeSeq = SerializeValueArray<'d>

Type returned from serialize_seq for serializing the content of the sequence.
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type SerializeTuple = SerializeValueArray<'d>

Type returned from serialize_tuple for serializing the content of the tuple.
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type SerializeTupleStruct = SerializeValueArray<'d>

Type returned from serialize_tuple_struct for serializing the content of the tuple struct.
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type SerializeTupleVariant = SerializeValueArray<'d>

Type returned from serialize_tuple_variant for serializing the content of the tuple variant.
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type SerializeMap = SerializeValueTable<'d>

Type returned from serialize_map for serializing the content of the map.
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type SerializeStruct = SerializeValueTable<'d>

Type returned from serialize_struct for serializing the content of the struct.
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type SerializeStructVariant = Impossible<<ValueSerializer<'d> as Serializer>::Ok, <ValueSerializer<'d> as Serializer>::Error>

Type returned from serialize_struct_variant for serializing the content of the struct variant.
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fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error>

Serialize a bool value. Read more
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fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error>

Serialize an i8 value. Read more
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fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error>

Serialize an i16 value. Read more
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fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error>

Serialize an i32 value. Read more
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fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error>

Serialize an i64 value. Read more
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fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error>

Serialize a u8 value. Read more
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fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error>

Serialize a u16 value. Read more
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fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error>

Serialize a u32 value. Read more
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fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error>

Serialize a u64 value. Read more
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fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error>

Serialize an f32 value. Read more
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fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error>

Serialize an f64 value. Read more
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fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error>

Serialize a character. Read more
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fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error>

Serialize a &str. Read more
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fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error>

Serialize a chunk of raw byte data. Read more
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fn serialize_none(self) -> Result<Self::Ok, Self::Error>

Serialize a None value. Read more
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fn serialize_some<T>(self, v: &T) -> Result<Self::Ok, Self::Error>
where T: Serialize + ?Sized,

Serialize a Some(T) value. Read more
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fn serialize_unit(self) -> Result<Self::Ok, Self::Error>

Serialize a () value. Read more
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fn serialize_unit_struct( self, name: &'static str, ) -> Result<Self::Ok, Self::Error>

Serialize a unit struct like struct Unit or PhantomData<T>. Read more
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fn serialize_unit_variant( self, name: &'static str, variant_index: u32, variant: &'static str, ) -> Result<Self::Ok, Self::Error>

Serialize a unit variant like E::A in enum E { A, B }. Read more
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fn serialize_newtype_struct<T>( self, name: &'static str, v: &T, ) -> Result<Self::Ok, Self::Error>
where T: Serialize + ?Sized,

Serialize a newtype struct like struct Millimeters(u8). Read more
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fn serialize_newtype_variant<T>( self, name: &'static str, variant_index: u32, variant: &'static str, value: &T, ) -> Result<Self::Ok, Self::Error>
where T: Serialize + ?Sized,

Serialize a newtype variant like E::N in enum E { N(u8) }. Read more
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fn serialize_seq( self, len: Option<usize>, ) -> Result<Self::SerializeSeq, Self::Error>

Begin to serialize a variably sized sequence. This call must be followed by zero or more calls to serialize_element, then a call to end. Read more
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fn serialize_tuple( self, len: usize, ) -> Result<Self::SerializeTuple, Self::Error>

Begin to serialize a statically sized sequence whose length will be known at deserialization time without looking at the serialized data. This call must be followed by zero or more calls to serialize_element, then a call to end. Read more
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fn serialize_tuple_struct( self, _name: &'static str, len: usize, ) -> Result<Self::SerializeTupleStruct, Self::Error>

Begin to serialize a tuple struct like struct Rgb(u8, u8, u8). This call must be followed by zero or more calls to serialize_field, then a call to end. Read more
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fn serialize_tuple_variant( self, _name: &'static str, _variant_index: u32, _variant: &'static str, len: usize, ) -> Result<Self::SerializeTupleVariant, Self::Error>

Begin to serialize a tuple variant like E::T in enum E { T(u8, u8) }. This call must be followed by zero or more calls to serialize_field, then a call to end. Read more
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fn serialize_map( self, len: Option<usize>, ) -> Result<Self::SerializeMap, Self::Error>

Begin to serialize a map. This call must be followed by zero or more calls to serialize_key and serialize_value, then a call to end. Read more
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fn serialize_struct( self, _name: &'static str, len: usize, ) -> Result<Self::SerializeStruct, Self::Error>

Begin to serialize a struct like struct Rgb { r: u8, g: u8, b: u8 }. This call must be followed by zero or more calls to serialize_field, then a call to end. Read more
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fn serialize_struct_variant( self, name: &'static str, _variant_index: u32, _variant: &'static str, _len: usize, ) -> Result<Self::SerializeStructVariant, Self::Error>

Begin to serialize a struct variant like E::S in enum E { S { r: u8, g: u8, b: u8 } }. This call must be followed by zero or more calls to serialize_field, then a call to end. Read more
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fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error>

Serialize an i128 value. Read more
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fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error>

Serialize a u128 value. Read more
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fn collect_seq<I>(self, iter: I) -> Result<Self::Ok, Self::Error>

Collect an iterator as a sequence. Read more
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fn collect_map<K, V, I>(self, iter: I) -> Result<Self::Ok, Self::Error>
where K: Serialize, V: Serialize, I: IntoIterator<Item = (K, V)>,

Collect an iterator as a map. Read more
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fn collect_str<T>(self, value: &T) -> Result<Self::Ok, Self::Error>
where T: Display + ?Sized,

Serialize a string produced by an implementation of Display. Read more
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fn is_human_readable(&self) -> bool

Determine whether Serialize implementations should serialize in human-readable form. Read more

Auto Trait Implementations§

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impl<'d> Freeze for ValueSerializer<'d>

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impl<'d> RefUnwindSafe for ValueSerializer<'d>

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impl<'d> Send for ValueSerializer<'d>

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impl<'d> Sync for ValueSerializer<'d>

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impl<'d> Unpin for ValueSerializer<'d>

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impl<'d> !UnwindSafe for ValueSerializer<'d>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.