Macro darling::uses_lifetimes

macro_rules! uses_lifetimes {
    ($impl_type : ty, $accessor : ident) => { ... };
    ($impl_type : ty, $first : ident, $($field : ident), +) => { ... };
}

Generator for UsesLifetimes impls that unions the used lifetimes of the selected fields.

Usage

The macro takes the type implementing the trait as the first argument, then a comma-separated list of fields for the rest of its arguments.

The type of each passed-in field must implement UsesLifetimes, or the resulting code won’t compile.