1 /// This macro creates a zero-overhead &CStr by adding a NUL terminator to
2 /// the string literal passed into it at compile-time. Use it like:
5 /// let some_const_cstr = const_cstr!("abc");
8 /// The above is roughly equivalent to:
11 /// let some_const_cstr = CStr::from_bytes_with_nul(b"abc\0").unwrap()
14 /// Note that macro only checks the string literal for internal NULs if
15 /// debug-assertions are enabled in order to avoid runtime overhead in release
18 macro_rules! const_cstr {
22 let str_plus_nul = concat!($s, "\0");
24 if cfg!(debug_assertions) {
25 CStr::from_bytes_with_nul(str_plus_nul.as_bytes()).unwrap()
28 CStr::from_bytes_with_nul_unchecked(str_plus_nul.as_bytes())