Trait FromValueBehavior 

pub trait FromValueBehavior {
    type Item;

    // Required method
    fn from_value(value: Value) -> Option<Self::Item>;
}

A trait for converting Value to types.

Required Associated Types

type Item

Required Methods

fn from_value(value: Value) -> Option<Self::Item>

Converts a Value into a type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FromValueBehavior for &str

type Item = String

fn from_value(value: Value) -> Option<<&str as FromValueBehavior>::Item>

impl FromValueBehavior for bool

type Item = bool

fn from_value(value: Value) -> Option<<bool as FromValueBehavior>::Item>

impl FromValueBehavior for f32

type Item = f32

fn from_value(value: Value) -> Option<<f32 as FromValueBehavior>::Item>

impl FromValueBehavior for f64

type Item = f64

fn from_value(value: Value) -> Option<<f64 as FromValueBehavior>::Item>

impl FromValueBehavior for i8

type Item = i8

fn from_value(value: Value) -> Option<<i8 as FromValueBehavior>::Item>

impl FromValueBehavior for i16

type Item = i16

fn from_value(value: Value) -> Option<<i16 as FromValueBehavior>::Item>

impl FromValueBehavior for i32

type Item = i32

fn from_value(value: Value) -> Option<<i32 as FromValueBehavior>::Item>

impl FromValueBehavior for i64

type Item = i64

fn from_value(value: Value) -> Option<<i64 as FromValueBehavior>::Item>

impl FromValueBehavior for i128

type Item = i128

fn from_value(value: Value) -> Option<<i128 as FromValueBehavior>::Item>

impl FromValueBehavior for str

type Item = String

fn from_value(value: Value) -> Option<<str as FromValueBehavior>::Item>

impl FromValueBehavior for u8

type Item = u8

fn from_value(value: Value) -> Option<<u8 as FromValueBehavior>::Item>

impl FromValueBehavior for u16

type Item = u16

fn from_value(value: Value) -> Option<<u16 as FromValueBehavior>::Item>

impl FromValueBehavior for u32

type Item = u32

fn from_value(value: Value) -> Option<<u32 as FromValueBehavior>::Item>

impl FromValueBehavior for u64

type Item = u64

fn from_value(value: Value) -> Option<<u64 as FromValueBehavior>::Item>

impl FromValueBehavior for u128

type Item = u128

fn from_value(value: Value) -> Option<<u128 as FromValueBehavior>::Item>

impl FromValueBehavior for String

Available on non-crate feature cstring only.

type Item = String

fn from_value(value: Value) -> Option<<String as FromValueBehavior>::Item>

impl<T> FromValueBehavior for Option<T>

where T: FromValueBehavior,

type Item = Option<<T as FromValueBehavior>::Item>

fn from_value(value: Value) -> Option<<Option<T> as FromValueBehavior>::Item>

impl<T> FromValueBehavior for BTreeMap<String, T>

where T: FromValueBehavior,

Available on non-crate feature cstring only.

type Item = BTreeMap<String, <T as FromValueBehavior>::Item>

fn from_value( value: Value, ) -> Option<<BTreeMap<String, T> as FromValueBehavior>::Item>

impl<T> FromValueBehavior for Vec<T>

where T: FromValueBehavior,

type Item = Vec<<T as FromValueBehavior>::Item>

fn from_value(value: Value) -> Option<<Vec<T> as FromValueBehavior>::Item>

impl<T> FromValueBehavior for HashMap<String, T>

where T: FromValueBehavior,

Available on non-crate feature cstring only.

type Item = HashMap<String, <T as FromValueBehavior>::Item>

fn from_value( value: Value, ) -> Option<<HashMap<String, T> as FromValueBehavior>::Item>

Implementors

impl FromValueBehavior for Value

type Item = Value

impl FromValueBehavior for ModuleData

type Item = ModuleData