Trait FromValue 

pub trait FromValue<'a>: Sized {
    // Required method
    fn from_value(value: &'a Value) -> Option<Self>;
}

Attempt to unwrap or parse Self from a referenced Value.

Required Methods

fn from_value(value: &'a Value) -> Option<Self>

Attempts to perform the conversion, returning None if the given value can not be used to produce Self.

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<'a> FromValue<'a> for &'a String

fn from_value(value: &'a Value) -> Option<&'a String>

impl<'a> FromValue<'a> for &'a Vec<Value>

fn from_value(value: &'a Value) -> Option<&'a Vec<Value>>

impl<'a> FromValue<'a> for bool

fn from_value(value: &'a Value) -> Option<bool>

impl<'a> FromValue<'a> for f32

fn from_value(value: &'a Value) -> Option<f32>

impl<'a> FromValue<'a> for f64

fn from_value(value: &'a Value) -> Option<f64>

impl<'a> FromValue<'a> for i8

fn from_value(value: &'a Value) -> Option<i8>

impl<'a> FromValue<'a> for i16

fn from_value(value: &'a Value) -> Option<i16>

impl<'a> FromValue<'a> for i32

fn from_value(value: &'a Value) -> Option<i32>

impl<'a> FromValue<'a> for i64

fn from_value(value: &'a Value) -> Option<i64>

impl<'a> FromValue<'a> for isize

fn from_value(value: &'a Value) -> Option<isize>

impl<'a> FromValue<'a> for u8

fn from_value(value: &'a Value) -> Option<u8>

impl<'a> FromValue<'a> for u16

fn from_value(value: &'a Value) -> Option<u16>

impl<'a> FromValue<'a> for u32

fn from_value(value: &'a Value) -> Option<u32>

impl<'a> FromValue<'a> for u64

fn from_value(value: &'a Value) -> Option<u64>

impl<'a> FromValue<'a> for usize

fn from_value(value: &'a Value) -> Option<usize>

impl<'a> FromValue<'a> for String

fn from_value(value: &'a Value) -> Option<String>

Implementors

impl<'a> FromValue<'a> for &'a Table

impl<'a, T> FromValue<'a> for T

where T: From<&'a Value>,