Macro new_curve_impl

macro_rules! new_curve_impl {
    (($($privacy:tt)*),
    $name:ident,
    $name_affine:ident,
    $flags_extra_byte:expr,
    $base:ident,
    $scalar:ident,
    $generator:expr,
    $constant_a:expr,
    $constant_b:expr,
    $curve_id:literal,
    $hash_to_curve:expr,
    ) => { ... };
}