3 #![warn(clippy::strlen_on_c_strings)]
5 #![feature(rustc_private)]
10 use std::ffi::{CStr, CString};
14 let cstring = CString::new("foo").expect("CString::new failed");
15 let _ = cstring.as_bytes().len();
18 let cstr = CStr::from_bytes_with_nul(b"foo\0").expect("CStr::from_bytes_with_nul failed");
19 let _ = cstr.to_bytes().len();
21 let _ = cstr.to_bytes().len();
23 let pcstr: *const &CStr = &cstr;
24 let _ = unsafe { (*pcstr).to_bytes().len() };
26 unsafe fn unsafe_identity<T>(x: T) -> T {
29 let _ = unsafe { unsafe_identity(cstr).to_bytes().len() };
30 let _ = unsafe { unsafe_identity(cstr) }.to_bytes().len();
32 let f: unsafe fn(_) -> _ = unsafe_identity;
33 let _ = unsafe { f(cstr).to_bytes().len() };