Macro core::core_simd::ops::assign::assign_ops

macro_rules! assign_ops {
    ($(impl<T, U, const LANES: usize> $assignTrait:ident<U> for Simd<T, LANES>
        where
            Self: $trait:ident,
        {
            fn $assign_call:ident(rhs: U) {
                $call:ident
            }
        })*) => { ... };
}

🔬This is a nightly-only experimental API. (portable_simd #86656)