macro_rules! declare_expanding_fifo { ($name: ident, $narrow_bits: expr, $narrow_count: expr, $wide_bits: expr, $wide_count: expr) => { ... }; }
macro_rules! declare_expanding_fifo { ($name: ident, $narrow_bits: expr, $narrow_count: expr, $wide_bits: expr, $wide_count: expr) => { ... }; }