Trait json_syntax::TryFromJson

pub trait TryFromJson: Sized {
    type Error;

    // Required method
    fn try_from_json_at(
        value: &Value,
        code_map: &CodeMap,
        offset: usize,
    ) -> Result<Self, Self::Error>;

    // Provided method
    fn try_from_json(
        value: &Value,
        code_map: &CodeMap,
    ) -> Result<Self, Self::Error> { ... }
}

Conversion from JSON syntax, with code mapping info.

This trait is very similar to TryFrom<Value> but also passes code code mapping info to the conversion function.

Required Associated Types

type Error

Error that may be returned by the conversion function.

Required Methods

fn try_from_json_at( value: &Value, code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

Tries to convert the given JSON value into Self, using the given code_map and the offset of value in the code map.

Note to implementors: use the JsonArray::iter_mapped and Object::iter_mapped methods to visit arrays and objects while keeping track of the code map offset of each visited item.

Provided Methods

fn try_from_json(value: &Value, code_map: &CodeMap) -> Result<Self, Self::Error>

Tries to convert the given JSON value into Self, using the given code_map.

It is assumed that the offset of value in the code map is 0, for instance if it is the output of a Parse trait function.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl TryFromJson for bool

type Error = Mapped<Unexpected>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for f32

type Error = Mapped<TryIntoNumberError<NumberType<f32>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for f64

type Error = Mapped<TryIntoNumberError<NumberType<f64>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for i8

type Error = Mapped<TryIntoNumberError<NumberType<i8>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for i16

type Error = Mapped<TryIntoNumberError<NumberType<i16>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for i32

type Error = Mapped<TryIntoNumberError<NumberType<i32>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for i64

type Error = Mapped<TryIntoNumberError<NumberType<i64>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for isize

type Error = Mapped<TryIntoNumberError<NumberType<isize>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for u8

type Error = Mapped<TryIntoNumberError<NumberType<u8>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for u16

type Error = Mapped<TryIntoNumberError<NumberType<u16>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for u32

type Error = Mapped<TryIntoNumberError<NumberType<u32>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for u64

type Error = Mapped<TryIntoNumberError<NumberType<u64>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for ()

type Error = Mapped<Unexpected>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for usize

type Error = Mapped<TryIntoNumberError<NumberType<usize>>>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl TryFromJson for String

type Error = Mapped<Unexpected>

fn try_from_json_at( json: &Value, _code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl<K: FromStr + Ord, V: TryFromJson> TryFromJson for BTreeMap<K, V>

where V::Error: From<Mapped<Unexpected>> + From<Mapped<K::Err>>,

type Error = <V as TryFromJson>::Error

fn try_from_json_at( json: &Value, code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl<T: TryFromJson> TryFromJson for Option<T>

type Error = <T as TryFromJson>::Error

fn try_from_json_at( json: &Value, code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl<T: TryFromJson> TryFromJson for Box<T>

type Error = <T as TryFromJson>::Error

fn try_from_json_at( json: &Value, code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

impl<T: TryFromJson> TryFromJson for Vec<T>

where T::Error: From<Mapped<Unexpected>>,

type Error = <T as TryFromJson>::Error

fn try_from_json_at( json: &Value, code_map: &CodeMap, offset: usize, ) -> Result<Self, Self::Error>

Implementors