#[cfg(not(feature = "verbose-expansions"))]
macro_rules! debug_input {($expr:expr) => ($expr)}
#[cfg(feature = "verbose-expansions")]
macro_rules! debug_input {($expr:expr) => (
match $expr { expr => {
eprintln!("{} ! ( {} )", FUNCTION_NAME, expr);
expr
}}
)}
#[cfg(not(feature = "verbose-expansions"))]
macro_rules! debug_output {($expr:expr) => ($expr)}
#[cfg(feature = "verbose-expansions")]
macro_rules! debug_output {($expr:expr) => (
match $expr { expr => {
eprintln!("=>\n{}", expr);
expr
}}
)}