Function wxd_Variant_Free_Rust_String 

#[unsafe(no_mangle)]
pub extern "C" fn wxd_Variant_Free_Rust_String(str_ptr: *mut c_char)

Function to properly free a string that was allocated by Rust using CString::into_raw(). This must be called instead of C’s free() for strings allocated by Rust.

Safety

The caller (C++) must ensure str_ptr is a valid pointer obtained from CString::into_raw() and that it hasn’t been freed already.