Trait ToValue
pub trait ToValue {
// Required methods
fn to_value(&self) -> Value;
fn value_type(&self) -> Type;
}Expand description
Trait to convert a value to a Value.
Similar to other common conversion traits, the following invariants are guaranteed:
- Invertibility:
x.to_value().get().unwrap() == x. In words,FromValueis the inverse ofToValue. - Idempotence:
x.to_value() == x.to_value().to_value(). In words, applyingToValuemultiple times yields the same result as applying it once. Idempotence also applies the other way around:value.get::<Value>()is a no-op.
There is also the possibility to wrap values within values, see BoxedValue. All (un-)boxing needs to be done
manually, and will be preserved under the conversion methods.
The conversion methods may cause values to be cloned, which may result in reference counter changes or heap allocations depending on the source and target type.
Required Methods§
fn value_type(&self) -> Type
fn value_type(&self) -> Type
Returns the type identifier of self.
This is the type of the value to be returned by to_value.
Implementations on Foreign Types§
§impl<T> ToValue for Option<T>where
T: ToValueOptional + StaticType,
Blanket implementation for all optional types.
impl<T> ToValue for Option<T>where
T: ToValueOptional + StaticType,
Blanket implementation for all optional types.
§impl<T> ToValue for &Twhere
T: ToValue + StaticType,
Blanket implementation for all references.
impl<T> ToValue for &Twhere
T: ToValue + StaticType,
Blanket implementation for all references.