Macro __impl_alt_from_data 

#[doc(hidden)]
macro_rules! __impl_alt_from_data {
    ($ty:ty, $methods:ident, $inferbase:ident) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, @guard $guard:ident) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, dataptr($elem:ty)) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, string_dataptr) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, string_dataptr, @guard $guard:ident) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, serialize) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, serialize, @guard $guard:ident) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, subset) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, dataptr($elem:ty), serialize) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, string_dataptr, serialize) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, string_dataptr, serialize, @guard $guard:ident) => { ... };
    ($ty:ty, $methods:ident, $inferbase:ident, subset, serialize) => { ... };
}