33 lines
919 B
Rust
33 lines
919 B
Rust
#![warn(clippy::strlen_on_c_strings)]
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#![allow(dead_code)]
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#![feature(rustc_private)]
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extern crate libc;
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#[allow(unused)]
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use libc::strlen;
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use std::ffi::{CStr, CString};
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fn main() {
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// CString
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let cstring = CString::new("foo").expect("CString::new failed");
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let _ = unsafe { libc::strlen(cstring.as_ptr()) };
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// CStr
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let cstr = CStr::from_bytes_with_nul(b"foo\0").expect("CStr::from_bytes_with_nul failed");
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let _ = unsafe { libc::strlen(cstr.as_ptr()) };
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let _ = unsafe { strlen(cstr.as_ptr()) };
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let pcstr: *const &CStr = &cstr;
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let _ = unsafe { strlen((*pcstr).as_ptr()) };
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unsafe fn unsafe_identity<T>(x: T) -> T {
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x
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}
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let _ = unsafe { strlen(unsafe_identity(cstr).as_ptr()) };
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let _ = unsafe { strlen(unsafe { unsafe_identity(cstr) }.as_ptr()) };
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let f: unsafe fn(_) -> _ = unsafe_identity;
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let _ = unsafe { strlen(f(cstr).as_ptr()) };
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}
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