use cstr::cstr; use std::ffi::CStr; macro_rules! cstr_expr { ($s:expr) => { cstr!($s) }; } macro_rules! cstr_literal { ($s:literal) => { cstr!($s) }; } fn main() { let foo: &'static CStr = cstr_expr!("foo"); assert_eq!(foo, CStr::from_bytes_with_nul(b"foo\0").unwrap()); let bar: &'static CStr = cstr_literal!("bar"); assert_eq!(bar, CStr::from_bytes_with_nul(b"bar\0").unwrap()); }