Trait FromValue 

pub trait FromValue<'cx>: Sized {
    type Config;

    // Required method
    fn from_value(
        cx: &'cx Context,
        value: &Value<'_>,
        strict: bool,
        config: Self::Config,
    ) -> Result<Self>;
}

Represents types that can be converted to from JavaScript Values.

Required Associated Types

type Config

Required Methods

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: Self::Config, ) -> Result<Self>

Converts value to the desired type. strict and config determine the strictness of the conversion and specify additional conversion constraints respectively. Returns Err with the error if conversion fails.

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<'cx> FromValue<'cx> for bool

type Config = ()

fn from_value( _: &'cx Context, value: &Value<'_>, strict: bool, _: (), ) -> Result<bool>

impl<'cx> FromValue<'cx> for f32

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, _: (), ) -> Result<f32>

impl<'cx> FromValue<'cx> for f64

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, _: (), ) -> Result<f64>

impl<'cx> FromValue<'cx> for i8

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<i8>

impl<'cx> FromValue<'cx> for i16

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<i16>

impl<'cx> FromValue<'cx> for i32

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<i32>

impl<'cx> FromValue<'cx> for i64

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<i64>

impl<'cx> FromValue<'cx> for *mut Symbol

type Config = ()

fn from_value( _: &'cx Context, value: &Value<'_>, _: bool, _: (), ) -> Result<*mut JSSymbol>

impl<'cx> FromValue<'cx> for *mut JSFunction

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: (), ) -> Result<*mut JSFunction>

impl<'cx> FromValue<'cx> for *mut JSObject

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, _: bool, _: (), ) -> Result<*mut JSObject>

impl<'cx> FromValue<'cx> for *mut JSString

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, _: (), ) -> Result<*mut JSString>

impl<'cx> FromValue<'cx> for u8

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<u8>

impl<'cx> FromValue<'cx> for u16

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<u16>

impl<'cx> FromValue<'cx> for u32

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<u32>

impl<'cx> FromValue<'cx> for u64

type Config = ConversionBehavior

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: ConversionBehavior, ) -> Result<u64>

impl<'cx> FromValue<'cx> for String

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: (), ) -> Result<String>

impl<'cx> FromValue<'cx> for JSVal

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, _: bool, _: (), ) -> Result<JSVal>

impl<'cx, T: TypedArrayElement, S: JSObjectStorage> FromValue<'cx> for TypedArray<T, S>

type Config = ()

fn from_value( cx: &'cx Context, value: &Value<'_>, _: bool, _: (), ) -> Result<TypedArray<T, S>>

impl<'cx, T: FromValue<'cx>> FromValue<'cx> for Option<T>

type Config = <T as FromValue<'cx>>::Config

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: T::Config, ) -> Result<Option<T>>

impl<'cx, T: FromValue<'cx>> FromValue<'cx> for Vec<T>

where T::Config: Clone,

type Config = <T as FromValue<'cx>>::Config

fn from_value( cx: &'cx Context, value: &Value<'_>, strict: bool, config: T::Config, ) -> Result<Vec<T>>

Implementors

impl<'cx> FromValue<'cx> for StringRef<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Function<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Array<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Date<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Object<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Promise<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for RegExp<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for ArrayBuffer<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for ion::string::String<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Value<'cx>

type Config = ()

impl<'cx> FromValue<'cx> for Symbol<'cx>

type Config = ()

impl<'cx, T: TypedArrayElement> FromValue<'cx> for ion::object::typedarray::TypedArray<'cx, T>

type Config = ()

impl<'cx, T: BytePredicate> FromValue<'cx> for ByteString<T>

type Config = ()

impl<'cx, T: FromValue<'cx>> FromValue<'cx> for Strict<T>

type Config = <T as FromValue<'cx>>::Config

impl<'cx, T: FromValue<'cx, Config = ConversionBehavior>> FromValue<'cx> for Clamp<T>

type Config = ()

impl<'cx, T: FromValue<'cx, Config = ConversionBehavior>> FromValue<'cx> for Enforce<T>

type Config = ()

impl<'cx, T: FromValue<'cx, Config = ConversionBehavior>> FromValue<'cx> for Wrap<T>

type Config = ()