rs_pmm_tools
macro_rules! remember_cond { (if $($t:tt)*) => { ... }; (($($cond:tt)*) $blk_if:block) => { ... }; (($($cond:tt)*) $blk_if:block else $blk_else:block) => { ... }; (($($cond_acc:tt)*) $t_cond:tt $($t_rest:tt)*) => { ... }; }