Trait FromValue 

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

Convert from a Value.

This trait is the basis for the Value::cast method.

Required Methods

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

where Self: Sized,

Perform the conversion.

Implementations on Foreign Types

impl<'v> FromValue<'v> for &'v (dyn Error + 'static)

Available on crate feature std only.

fn from_value(value: Value<'v>) -> Option<&'v (dyn Error + 'static)>

impl<'v> FromValue<'v> for &'v str

fn from_value(value: Value<'v>) -> Option<&'v str>

impl<'v> FromValue<'v> for Cow<'v, str>

fn from_value(value: Value<'v>) -> Option<Cow<'v, str>>

impl<'v> FromValue<'v> for bool

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

impl<'v> FromValue<'v> for f64

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

impl<'v> FromValue<'v> for i8

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

impl<'v> FromValue<'v> for i16

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

impl<'v> FromValue<'v> for i32

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

impl<'v> FromValue<'v> for i64

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

impl<'v> FromValue<'v> for i128

fn from_value(value: Value<'v>) -> Option<i128>

impl<'v> FromValue<'v> for isize

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

impl<'v> FromValue<'v> for u8

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

impl<'v> FromValue<'v> for u16

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

impl<'v> FromValue<'v> for u32

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

impl<'v> FromValue<'v> for u64

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

impl<'v> FromValue<'v> for u128

fn from_value(value: Value<'v>) -> Option<u128>

impl<'v> FromValue<'v> for usize

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

impl<'v> FromValue<'v> for String

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

Implementors

impl<'a> FromValue<'a> for Path<'a>

impl<'k> FromValue<'k> for Str<'k>

impl<'v> FromValue<'v> for Kind

impl<'v> FromValue<'v> for Level

impl<'v> FromValue<'v> for SpanKind

impl<'v> FromValue<'v> for Point

impl<'v> FromValue<'v> for SpanId

impl<'v> FromValue<'v> for SpanLink

impl<'v> FromValue<'v> for TraceId

impl<'v> FromValue<'v> for Timestamp

impl<'v> FromValue<'v> for Value<'v>