Struct log::kv::Value

pub struct Value<'v> { /* fields omitted */ }

A value in a structured key-value pair.

Implementations

impl<'v> Value<'v>

pub fn from_fill<T>(value: &'v T) -> Self where
    T: Fill + 'static, 

Get a value from a fillable slot.

impl<'v> Value<'v>

pub fn to_str(&self) -> Option<Cow<'_, str>>

Try get a usize from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones. If the serialization implementation produces a short lived string it will be allocated.

impl<'v> Value<'v>

pub fn to_usize(&self) -> Option<usize>

Try get a usize from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_u8(&self) -> Option<u8>

Try get a u8 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_u16(&self) -> Option<u16>

Try get a u16 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_u32(&self) -> Option<u32>

Try get a u32 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_u64(&self) -> Option<u64>

Try get a u64 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_isize(&self) -> Option<isize>

Try get a isize from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_i8(&self) -> Option<i8>

Try get a i8 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_i16(&self) -> Option<i16>

Try get a i16 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_i32(&self) -> Option<i32>

Try get a i32 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_i64(&self) -> Option<i64>

Try get a i64 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_f32(&self) -> Option<f32>

Try get a f32 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_f64(&self) -> Option<f64>

Try get a f64 from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_bool(&self) -> Option<bool>

Try get a bool from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_char(&self) -> Option<char>

Try get a char from this value.

This method is cheap for primitive types, but may call arbitrary serialization implementations for complex ones.

pub fn to_borrowed_str(&self) -> Option<&str>

Try get a str from this value.

This method is cheap for primitive types. It won’t allocate an owned String if the value is a complex type.

impl<'v> Value<'v>

pub fn from_debug<T>(value: &'v T) -> Self where
    T: Debug + 'static, 

Get a value from a debuggable type.

pub fn from_display<T>(value: &'v T) -> Self where
    T: Display + 'static, 

Get a value from a displayable type.

Trait Implementations

impl<'v> Debug for Value<'v>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'v> Display for Value<'v>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'v> From<&'v str> for Value<'v>

fn from(value: &'v str) -> Self

Performs the conversion.

impl<'v> From<Arguments<'v>> for Value<'v>

fn from(value: Arguments<'v>) -> Self

Performs the conversion.

impl<'v> From<bool> for Value<'v>

fn from(value: bool) -> Self

Performs the conversion.

impl<'v> From<char> for Value<'v>

fn from(value: char) -> Self

Performs the conversion.

impl<'v> From<f32> for Value<'v>

fn from(value: f32) -> Self

Performs the conversion.

impl<'v> From<f64> for Value<'v>

fn from(value: f64) -> Self

Performs the conversion.

impl<'v> From<i16> for Value<'v>

fn from(value: i16) -> Self

Performs the conversion.

impl<'v> From<i32> for Value<'v>

fn from(value: i32) -> Self

Performs the conversion.

impl<'v> From<i64> for Value<'v>

fn from(value: i64) -> Self

Performs the conversion.

impl<'v> From<i8> for Value<'v>

fn from(value: i8) -> Self

Performs the conversion.

impl<'v> From<isize> for Value<'v>

fn from(value: isize) -> Self

Performs the conversion.

impl<'v> From<u16> for Value<'v>

fn from(value: u16) -> Self

Performs the conversion.

impl<'v> From<u32> for Value<'v>

fn from(value: u32) -> Self

Performs the conversion.

impl<'v> From<u64> for Value<'v>

fn from(value: u64) -> Self

Performs the conversion.

impl<'v> From<u8> for Value<'v>

fn from(value: u8) -> Self

Performs the conversion.

impl<'v> From<usize> for Value<'v>

fn from(value: usize) -> Self

Performs the conversion.

impl<'v> ToValue for Value<'v>

fn to_value(&self) -> Value<'_>

Perform the conversion.