Trait FromValue

pub trait FromValue<'a>: Sized {
    // Required method
    fn from_value(
        ctx: &FromValueContext<'a>,
        value: &'a Value,
    ) -> Result<Self, FromValueError>;
}

Implemented for any type that can be created from a Ruby Value.

Required Methods

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

Create this type from the given value from the ValueArena.

Arguments

1. ctx: The value extraction context.
2. handle: The handle that points to the value to convert.

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<'a> FromValue<'a> for bool

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

impl<'a> FromValue<'a> for i32

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

impl<'a, K, V> FromValue<'a> for BTreeMap<K, V>

where K: FromValue<'a> + Eq + Ord, V: FromValue<'a>,

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

impl<'a, K, V> FromValue<'a> for HashMap<K, V>

where K: FromValue<'a> + Hash + Eq, V: FromValue<'a>,

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

impl<'a, T> FromValue<'a> for Option<T>

where T: FromValue<'a>,

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

impl<'a, T> FromValue<'a> for Vec<T>

where T: FromValue<'a>,

fn from_value( ctx: &FromValueContext<'a>, value: &'a Value, ) -> Result<Self, FromValueError>

Implementors

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

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

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

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

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

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

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

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

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

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