Macro serde::de::impls::int_to_uint

macro_rules! int_to_uint {
    ($ty:ident : $visit:ident) => { ... };
    (nonzero $primitive:ident $ty:ident : $visit:ident) => { ... };
    (saturating $primitive:ident $ty:ident : $visit:ident) => { ... };
}