Trait erased_serde::Deserializer

source · [−]
pub trait Deserializer<'de> {

Show 32 methods    fn erased_deserialize_any(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_bool(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_u8(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_u16(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_u32(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_u64(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_i8(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_i16(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_i32(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_i64(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_i128(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_u128(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_f32(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_f64(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_char(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_str(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_string(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_bytes(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_byte_buf(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_option(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_unit(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_unit_struct(
        &mut self, 
        name: &'static str, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_newtype_struct(
        &mut self, 
        name: &'static str, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_seq(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_tuple(
        &mut self, 
        len: usize, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_tuple_struct(
        &mut self, 
        name: &'static str, 
        len: usize, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_map(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_struct(
        &mut self, 
        name: &'static str, 
        fields: &'static [&'static str], 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_identifier(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_enum(
        &mut self, 
        name: &'static str, 
        variants: &'static [&'static str], 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_deserialize_ignored_any(
        &mut self, 
        v: &mut dyn Visitor<'de>
    ) -> Result<Out, Error>;

    fn erased_is_human_readable(&self) -> bool;

}
Expand description

An object-safe equivalent of Serde’s Deserializer trait.

Any implementation of Serde’s Deserializer can be converted to an &erased_serde::Deserializer or Box<erased_serde::Deserializer> trait object using erased_serde::Deserializer::erase.

use erased_serde::Deserializer;
use std::collections::BTreeMap as Map;

fn main() {
    static JSON: &'static [u8] = br#"{"A": 65, "B": 66}"#;
    static CBOR: &'static [u8] = &[162, 97, 65, 24, 65, 97, 66, 24, 66];

    // Construct some deserializers.
    let json = &mut serde_json::Deserializer::from_slice(JSON);
    let cbor = &mut serde_cbor::Deserializer::from_slice(CBOR);

    // The values in this map are boxed trait objects, which is not possible
    // with the normal serde::Deserializer because of object safety.
    let mut formats: Map<&str, Box<dyn Deserializer>> = Map::new();
    formats.insert("json", Box::new(<dyn Deserializer>::erase(json)));
    formats.insert("cbor", Box::new(<dyn Deserializer>::erase(cbor)));

    // Pick a Deserializer out of the formats map.
    let format = formats.get_mut("json").unwrap();

    let data: Map<String, usize> = erased_serde::deserialize(format).unwrap();

    println!("{}", data["A"] + data["B"]);
}

Required methods

Implementations

Convert any Serde Deserializer to a trait object.

use erased_serde::Deserializer;
use std::collections::BTreeMap as Map;

fn main() {
    static JSON: &'static [u8] = br#"{"A": 65, "B": 66}"#;
    static CBOR: &'static [u8] = &[162, 97, 65, 24, 65, 97, 66, 24, 66];

    // Construct some deserializers.
    let json = &mut serde_json::Deserializer::from_slice(JSON);
    let cbor = &mut serde_cbor::Deserializer::from_slice(CBOR);

    // The values in this map are boxed trait objects, which is not possible
    // with the normal serde::Deserializer because of object safety.
    let mut formats: Map<&str, Box<dyn Deserializer>> = Map::new();
    formats.insert("json", Box::new(<dyn Deserializer>::erase(json)));
    formats.insert("cbor", Box::new(<dyn Deserializer>::erase(cbor)));

    // Pick a Deserializer out of the formats map.
    let format = formats.get_mut("json").unwrap();

    let data: Map<String, usize> = erased_serde::deserialize(format).unwrap();

    println!("{}", data["A"] + data["B"]);
}

Trait Implementations

The error type that can be returned if some error occurs during deserialization. Read more

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more

Hint that the Deserialize type is expecting a bool value.

Hint that the Deserialize type is expecting a u8 value.

Hint that the Deserialize type is expecting a u16 value.

Hint that the Deserialize type is expecting a u32 value.

Hint that the Deserialize type is expecting a u64 value.

Hint that the Deserialize type is expecting an i8 value.

Hint that the Deserialize type is expecting an i16 value.

Hint that the Deserialize type is expecting an i32 value.

Hint that the Deserialize type is expecting an i64 value.

Hint that the Deserialize type is expecting an i128 value. Read more

Hint that the Deserialize type is expecting an u128 value. Read more

Hint that the Deserialize type is expecting a f32 value.

Hint that the Deserialize type is expecting a f64 value.

Hint that the Deserialize type is expecting a char value.

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting an optional value. Read more

Hint that the Deserialize type is expecting a unit value.

Hint that the Deserialize type is expecting a unit struct with a particular name. Read more

Hint that the Deserialize type is expecting a newtype struct with a particular name. Read more

Hint that the Deserialize type is expecting a sequence of values.

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data. Read more

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields. Read more

Hint that the Deserialize type is expecting a map of key-value pairs.

Hint that the Deserialize type is expecting a struct with a particular name and fields. Read more

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant. Read more

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants. Read more

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored. Read more

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more

The error type that can be returned if some error occurs during deserialization. Read more

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more

Hint that the Deserialize type is expecting a bool value.

Hint that the Deserialize type is expecting a u8 value.

Hint that the Deserialize type is expecting a u16 value.

Hint that the Deserialize type is expecting a u32 value.

Hint that the Deserialize type is expecting a u64 value.

Hint that the Deserialize type is expecting an i8 value.

Hint that the Deserialize type is expecting an i16 value.

Hint that the Deserialize type is expecting an i32 value.

Hint that the Deserialize type is expecting an i64 value.

Hint that the Deserialize type is expecting an i128 value. Read more

Hint that the Deserialize type is expecting an u128 value. Read more

Hint that the Deserialize type is expecting a f32 value.

Hint that the Deserialize type is expecting a f64 value.

Hint that the Deserialize type is expecting a char value.

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting an optional value. Read more

Hint that the Deserialize type is expecting a unit value.

Hint that the Deserialize type is expecting a unit struct with a particular name. Read more

Hint that the Deserialize type is expecting a newtype struct with a particular name. Read more

Hint that the Deserialize type is expecting a sequence of values.

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data. Read more

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields. Read more

Hint that the Deserialize type is expecting a map of key-value pairs.

Hint that the Deserialize type is expecting a struct with a particular name and fields. Read more

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant. Read more

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants. Read more

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored. Read more

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more

The error type that can be returned if some error occurs during deserialization. Read more

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more

Hint that the Deserialize type is expecting a bool value.

Hint that the Deserialize type is expecting a u8 value.

Hint that the Deserialize type is expecting a u16 value.

Hint that the Deserialize type is expecting a u32 value.

Hint that the Deserialize type is expecting a u64 value.

Hint that the Deserialize type is expecting an i8 value.

Hint that the Deserialize type is expecting an i16 value.

Hint that the Deserialize type is expecting an i32 value.

Hint that the Deserialize type is expecting an i64 value.

Hint that the Deserialize type is expecting an i128 value. Read more

Hint that the Deserialize type is expecting an u128 value. Read more

Hint that the Deserialize type is expecting a f32 value.

Hint that the Deserialize type is expecting a f64 value.

Hint that the Deserialize type is expecting a char value.

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting an optional value. Read more

Hint that the Deserialize type is expecting a unit value.

Hint that the Deserialize type is expecting a unit struct with a particular name. Read more

Hint that the Deserialize type is expecting a newtype struct with a particular name. Read more

Hint that the Deserialize type is expecting a sequence of values.

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data. Read more

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields. Read more

Hint that the Deserialize type is expecting a map of key-value pairs.

Hint that the Deserialize type is expecting a struct with a particular name and fields. Read more

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant. Read more

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants. Read more

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored. Read more

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more

The error type that can be returned if some error occurs during deserialization. Read more

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more

Hint that the Deserialize type is expecting a bool value.

Hint that the Deserialize type is expecting a u8 value.

Hint that the Deserialize type is expecting a u16 value.

Hint that the Deserialize type is expecting a u32 value.

Hint that the Deserialize type is expecting a u64 value.

Hint that the Deserialize type is expecting an i8 value.

Hint that the Deserialize type is expecting an i16 value.

Hint that the Deserialize type is expecting an i32 value.

Hint that the Deserialize type is expecting an i64 value.

Hint that the Deserialize type is expecting an i128 value. Read more

Hint that the Deserialize type is expecting an u128 value. Read more

Hint that the Deserialize type is expecting a f32 value.

Hint that the Deserialize type is expecting a f64 value.

Hint that the Deserialize type is expecting a char value.

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer. Read more

Hint that the Deserialize type is expecting an optional value. Read more

Hint that the Deserialize type is expecting a unit value.

Hint that the Deserialize type is expecting a unit struct with a particular name. Read more

Hint that the Deserialize type is expecting a newtype struct with a particular name. Read more

Hint that the Deserialize type is expecting a sequence of values.

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data. Read more

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields. Read more

Hint that the Deserialize type is expecting a map of key-value pairs.

Hint that the Deserialize type is expecting a struct with a particular name and fields. Read more

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant. Read more

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants. Read more

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored. Read more

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more

Implementations on Foreign Types

Implementors