12 stable releases
1.3.1 | Sep 20, 2023 |
---|---|
1.3.0 | Sep 4, 2023 |
1.2.9 | Aug 29, 2023 |
1.2.7 | Mar 11, 2023 |
0.1.1 | Sep 7, 2022 |
#2528 in Rust patterns
53 downloads per month
27KB
473 lines
Struct Convert
This crate provides a set of alternative customizable #[derive] attributes for Rust. To help you covnert between structs simplify.
What it does
use struct_convert::Convert;
#[derive(Convert)]
#[convert(from = "some_mod::Remote")]
#[convert(from = "C")]
#[convert(into = "B")]
struct A {
value: i64,
}
struct B {
value: i64,
}
struct C {
value: i64,
}
mod some_mod {
pub struct Remote {
pub value: i64,
}
}
fn main() {}
#[test]
fn test_proxy() {
let c = C { value: 8 };
let a: A = c.into();
let b: B = a.into();
debug_assert_eq!(8, b.value);
let r = some_mod::Remote { value: 7 };
let a2: A = r.into();
debug_assert_eq!(7, a2.value);
}
Chech the examples for more!
Example
Combination of Derivative and sturct-convert
use derivative::Derivative;
use struct_convert::Convert;
use time::OffsetDateTime;
#[derive(Derivative, Convert, Debug)]
#[derivative(Default)]
#[convert(default)]
#[convert(from = "A")]
struct SomeStruct {
name: String,
#[derivative(Default(value = "OffsetDateTime::now_utc()"))]
#[convert_field(from="A", ignore)]
at: OffsetDateTime,
}
struct A {
name: String,
}
fn main() {
let a = A{
name: "A".to_string()
};
let ss: SomeStruct = a.into();
println!("{:?}", ss);
// SomeStruct { name: "A", at: 2023-03-03 6:13:32.5684174 +00:00:00 }
}
Inner stuct convert.
use struct_convert::Convert;
#[derive(Debug, PartialEq)]
struct BInner {
name: String,
}
#[derive(Debug, PartialEq)]
struct B {
bid: i64,
inner: BInner,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "B")]
struct A {
#[convert_field(rename = "bid")]
id: i64,
inner: AInner,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "BInner")]
struct AInner {
name: String,
}
fn main() {
let a = A {
id: 2,
inner: AInner {
name: String::from("AInner"),
},
};
let b: B = a.into();
debug_assert_eq!(
B {
bid: 2,
inner: BInner {
name: String::from("AInner")
},
},
b
);
}
Option field convert.
use struct_convert::Convert;
#[derive(Debug, PartialEq)]
struct BInner {
name: String,
}
#[derive(Debug, PartialEq)]
struct B {
name: String,
name2: String,
opt_str: Option<String>,
opt_str2: Option<String>,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "B")]
struct A {
#[convert_field(unwrap)]
name: Option<String>,
#[convert_field(unwrap)]
name2: Option<String>,
#[convert_field(option)]
opt_str: String,
#[convert_field(option)]
opt_str2: Option<String>,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "BInner")]
struct AInner {
name: String,
}
fn main() {
let a = A {
name: Some("Jack".to_string()),
opt_str: String::from("str"),
opt_str2: Some(String::from("Option")),
name2: None,
};
let b: B = a.into();
debug_assert_eq!(
B {
name: "Jack".to_string(),
opt_str: Some(String::from("str")),
opt_str2: Some(String::from("Option")),
name2: "".to_string()
},
b
);
}
Ignore Some fileds.
use struct_convert::Convert;
#[derive(Debug, PartialEq)]
struct B {
num: String,
name: String,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "B")]
struct A {
#[convert_field(ignore)]
id: i64,
#[convert_field(to_string)]
num: i64,
#[convert_field(unwrap)]
name: Option<String>,
}
fn main() {
let a = A {
id: 2,
num: 1,
name: Some("Jack".to_string()),
};
let b: B = a.into();
debug_assert_eq!(
B {
num: "1".to_string(),
name: "Jack".to_string(),
},
b
);
}
convert B from A
use struct_convert::Convert;
#[derive(Debug, Convert, PartialEq)]
#[convert(from = "AInner")]
struct BInner {
name: String,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(from = "A")]
struct B {
#[convert_field(rename = "id")]
bid: i64,
#[convert_field(to_string)]
num: String,
#[convert_field(unwrap)]
name: String,
inner: BInner,
#[convert_field(wrap)]
opt_str: Option<String>,
opt_str2: Option<String>
}
#[derive(Debug, PartialEq)]
struct A {
ignore_f: i64,
id: i64,
num: i64,
name: Option<String>,
inner: AInner,
opt_str: String,
opt_str2: Option<String>,
}
#[derive(Debug, PartialEq)]
struct AInner {
name: String,
}
fn main() {
let a = A {
id: 2,
num: 1,
name: Some("Jack".to_string()),
inner: AInner {
name: String::from("AInner"),
},
opt_str: String::from("str"),
opt_str2: Some(String::from("Option")),
ignore_f: 1,
};
let b: B = a.into();
debug_assert_eq!(
B {
num: "1".to_string(),
bid: 2,
name: "Jack".to_string(),
inner: BInner {
name: String::from("AInner")
},
opt_str: Some(String::from("str")),
opt_str2: Some(String::from("Option"))
},
b
);
}
Convert with custom function.
use struct_convert::Convert;
#[derive(Debug, PartialEq)]
struct B {
bid: i64,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(into = "B")]
struct A {
#[convert_field(rename = "bid", custom_fn = "str_to_i64")]
id_str: String,
}
#[derive(Debug, Convert, PartialEq)]
#[convert(from = "B")]
struct C {
#[convert_field(rename = "bid", custom_fn = "to_point")]
point: Point,
}
#[derive(Debug, PartialEq)]
struct Point(i64, i64);
fn str_to_i64(a: &A) -> i64 {
a.id_str.parse().unwrap()
}
fn to_point(b: &B) -> Point {
Point(b.bid, b.bid)
}
fn main() {
let a = A { id_str: "4".into() };
let b: B = a.into();
debug_assert_eq!(B { bid: 4 }, b);
let c: C = b.into();
debug_assert_eq!(C { point: Point(4, 4) }, c);
}
More examples look here.
Welcome PR.
Dependencies
~3MB
~69K SLoC