Trait table::value::FromValue

pub trait FromValue<'a>: Sized {
    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.

Implementations on Foreign Types

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

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

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

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

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

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

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

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

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

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

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

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

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 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 f32

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

Implementors

• impl<'a, T> FromValue<'a> for T where     T: From<&'a Value>,

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