Switch back to CStr::from_bytes_with_nul_unchecked

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cstr"
-version = "0.2.9"
+version = "0.2.10"
 authors = ["Xidorn Quan <[email protected]>"]
 description = "Macro for building static CStr reference"
 repository = "https://github.com/upsuper/cstr"

README.md

@@ -11,7 +11,7 @@ A macro for getting `&'static CStr` from literal or identifier.
 This macro checks whether the given literal is valid for `CStr`
 at compile time, and returns a static reference of `CStr`.
 
-This macro can be used to to initialize constants on Rust 1.46 and above.
+This macro can be used to to initialize constants on Rust 1.59 and above.
 
 ## Example
 

src/lib.rs

@@ -3,7 +3,7 @@
 //! This macro checks whether the given literal is valid for `CStr`
 //! at compile time, and returns a static reference of `CStr`.
 //!
-//! This macro can be used to to initialize constants on Rust 1.46 and above.
+//! This macro can be used to to initialize constants on Rust 1.59 and above.
 //!
 //! ## Example
 //!
@@ -37,16 +37,7 @@ struct Error(Span, &'static str);
 #[proc_macro]
 pub fn cstr(input: RawTokenStream) -> RawTokenStream {
     let tokens = match build_byte_str(input.into()) {
-        // We can't use `&*ptr` to convert the raw pointer to reference, because as of Rust 1.46,
-        // dereferencing raw pointer in constants is unstable.
-        // This is being tracked in https://github.com/rust-lang/rust/issues/51911
-        // So we explicitly disable the clippy lint for this expression.
-        Ok(s) => quote!(unsafe {
-            #[allow(clippy::transmute_ptr_to_ref)]
-            ::std::mem::transmute::<_, &::std::ffi::CStr>(
-                #s as *const [u8] as *const ::std::ffi::CStr
-            )
-        }),
+        Ok(s) => quote!(unsafe { ::std::ffi::CStr::from_bytes_with_nul_unchecked(#s) }),
         Err(Error(span, msg)) => quote_spanned!(span => compile_error!(#msg)),
     };
     tokens.into()