Default

FieldX can provide implicit implementation of the Default trait for a struct in one of the following cases:

• When the argument <a name="a001"></a>default is provided and active to the fxstruct macro.

  #[fxstruct(default)]
  struct Foo {
      is_set: bool,
  }

• When the argument default is provided and active for any field's fieldx attribute.

  #[fxstruct]
  struct Foo {
      #[fieldx(get(copy), default(3.1415926535))]
      pi: f32,
  }
  
  let foo = Foo::default();
  assert_eq!(foo.pi(), 3.1415926535);

• When another argument, like the struct level new argument, needs it.

  #[fxstruct(new)]
  struct Bar {
      #[fieldx(get(copy), default(2.7182818284))]
      e: f32,
  }
  
  let bar = Bar::new();
  assert_eq!(bar.e(), 2.7182818284);