Rust's From
trait is a general-purpose trait for converting between types. For any two types TypeA
and TypeB
,
impl From<TypeA> for TypeB
indicates that an instance of TypeB
is guaranteed to be constructible from an instance of TypeA
. An implementation of From
looks like this:
struct TypeA {
a: u32,
}
struct TypeB {
b: u32,
}
impl From<TypeA> for TypeB {
fn from(src: TypeA) -> Self {
TypeB {
b: src.a,
}
}
}