1//! Macro definitions 2 3/// Constant panicking assertion. 4// TODO(tarcieri): use const panic when stable. 5// See: https://github.com/rust-lang/rust/issues/51999 6macro_rules! const_assert { 7 ($bool:expr, $msg:expr) => { 8 [$msg][!$bool as usize] 9 }; 10}