Default Values

Default Value

Supported by queried with #[diplomat::cfg(supports=defaults)] You can mark the default value of an Enum through #[diplomat::default]:

pub enum MyEnum {
    A,
    B,
    #[diplomat::default]
    C
}

Supported by queried with #[diplomat::cfg(supports=default_args)]

Some backends support marking parameters with default values:

impl Test {
    pub fn test(a : i32, b : i64,
    #[diplomat::attr(supports=defaults, default_value=100)]
    c : i64) {}
}

In C++ for instance, this function will now be defined with a default value:

void Test::test(int32_t a, int64_t b, int64_t c = 100);

Diplomat currently supports reading default values in the following formats:

You can set a default value to be any of these, regardless of the type of the parameter itself (although the compiler may complain).