Macro c_macros::to_raw_c_string

to_raw_c_string!() { /* proc-macro */ }

Convert an encoded string to a *mut c_char allocated in the system heap.

Examples

#![feature(proc_macro_hygiene, new_uninit, type_ascription)]
 
use c_macros::to_raw_c_string;
use std::ffi::CString;
use std::os::raw::c_char;
 
#[link(name = "my_library.h")]
extern "C" {
    fn mutate_foo(foo: *mut c_char);
}
 
let foo = to_raw_c_string!("Hello world!\n");
 
unsafe {
    mutate_foo(foo);
}
 
let _ = unsafe { CString::from_raw(foo) }; 
// properly drop the allocated c string before it goes out of scope