Macro c_str 

macro_rules! c_str {
    ($lit:expr) => { ... };
}

Produce a CStr reference out of a static string literal.

This macro provides a convenient way to use string literals in expressions where a std::ffi::CStr reference is accepted. The macro parameter does not need to end with "\0", as the 0 byte is appended by the macro.

The lifetime of the output reference is inferred from the expansion site. This is always safe because the string is static and immutable.

Example

#[macro_use]
extern crate c_str_macro;

extern crate libc;

fn main() {
    let s = c_str!("Hello, world!");
    unsafe { libc::puts(s.as_ptr()) };
}