Trait value_from_type_traits::FromType [−] [src]

pub trait FromType<T> {
    fn from_type() -> Self;
}

Returns an enum variant for the generic argument.

This trait is similar to From without needing to provide an actual (l-)value.
As with the From trait, developers are encouraged to implement this trait for their types or equivalently use the procedural macro attribute [value_from_type_macros::value_from_type] found within the value_from_type_macros crate.

Examples

#[derive(Debug)]
struct X;
#[derive(Debug, PartialEq)]
enum StructVariants { X_V };
 
impl FromType<X> for StructVariants {
    fn from_type() -> Self {
        StructVariants::X_V
    }
}
 
assert_eq!(StructVariants::X_V, <StructVariants as FromType<X>>::from_type());
assert_eq!(StructVariants::X_V, X::into_enum());

Required Methods

Implementors