4 releases (2 breaking)
Uses old Rust 2015
0.5.0 | Nov 19, 2018 |
---|---|
0.4.1 | Nov 17, 2018 |
0.4.0 | Nov 16, 2018 |
0.1.0 | Nov 15, 2018 |
#2209 in Rust patterns
Used in fields-converter-derive
8KB
78 lines
clone-fields
Fields-wise types cloning. Nothing more, nothing less.
use clone_fields::{CloneFields, CloneInto, CloneFrom};
// PartialEq and Debug traits are only required for `assert` macros in the example.
#[derive(PartialEq, Debug, CloneFields)]
#[destinations("External")]
struct Original<'a, T: Clone> {
field1: &'a i64,
field2: T,
nested: OriginalNested,
}
#[derive(PartialEq, Debug, CloneFields)]
#[destinations("ExternalNested", "ExternalNested2")]
struct OriginalNested {
value: i32,
}
// S2 might be a *foreign* type, i.e. declared in a different crate.
struct External<'a, T: Clone> {
field1: &'a i64,
field2: T,
nested: ExternalNested,
}
struct ExternalNested {
value: i32,
}
// This struct only exists for the sake of using `destinations` attribute with more than one
// type :)
struct ExternalNested2 {
value: i32,
}
fn main() {
let obj: Original<_> = Original {
field1: &0,
field2: String::from("lol"),
nested: OriginalNested { value: 15 }
};
let cloned: External<_> = obj.clone_into();
assert_eq!(obj.field1, cloned.field1);
assert_eq!(obj.field2, cloned.field2);
assert_eq!(obj.nested.value, cloned.nested.value);
let cloned2 = Original::clone_from(&cloned);
assert_eq!(cloned.field1, cloned2.field1);
assert_eq!(cloned.field2, cloned2.field2);
assert_eq!(obj, cloned2);
}
License: MIT/Apache-2.0
Dependencies
~2MB
~46K SLoC