Macro aoko::structs_default_decl
source · macro_rules! structs_default_decl { ($vis:vis struct $s_name:ident; $($tail:tt)*) => { ... }; ($(#[$attr:meta])* $vis:vis struct $name:ident $(<$($generic:tt),*>)? { $($field_vis:vis $field:ident: $type:ty = $val:expr),* $(,)? } $($tail:tt)*) => { ... }; () => { ... }; }
Expand description
Struct::default()
: assigning user-defined values to fields directly.
Principles
Text replacement, automatic function generation.
Examples
use aoko::{structs_default_decl, assert_eqs};
structs_default_decl!(
#[derive(Debug)]
pub struct A<'a> {
foo: u8 = 233,
pub bar: &'a str = "abc",
}
struct B {}
struct C;
);
let a = A::default();
assert_eqs!(
233, a.foo;
"abc", a.bar;
"A { foo: 233, bar: \"abc\" }", format!("{:?}", a);
);