Trait FromValue 

pub trait FromValue: Sized {
    const EXPECTED: &'static str;

    // Required method
    fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>;
}

Required Associated Constants

const EXPECTED: &'static str

Required Methods

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FromValue for String

const EXPECTED: &'static str = "string"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for Vec<u8>

const EXPECTED: &'static str = "bytes"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for bool

const EXPECTED: &'static str = "boolean"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for f32

const EXPECTED: &'static str = "f32"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for f64

const EXPECTED: &'static str = "f64"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for i8

const EXPECTED: &'static str = "i8"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for i16

const EXPECTED: &'static str = "i16"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for i32

const EXPECTED: &'static str = "i32"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for i64

const EXPECTED: &'static str = "i64"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for isize

const EXPECTED: &'static str = "isize"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for u8

const EXPECTED: &'static str = "u8"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for u16

const EXPECTED: &'static str = "u16"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for u32

const EXPECTED: &'static str = "u32"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for u64

const EXPECTED: &'static str = "u64"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl FromValue for usize

const EXPECTED: &'static str = "usize"

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

impl<T: FromValue> FromValue for Option<T>

const EXPECTED: &'static str = T::EXPECTED

fn from_value(value: &Value, index: usize) -> Result<Self, DecodeError>

Implementors

impl<T: FromValue> FromValue for SqlArray<T>

const EXPECTED: &'static str = "array"