Resolve improper ctype lint affecting RustString
diff --git a/src/rust_string.rs b/src/rust_string.rs
index a5fa3f4..77a83f6 100644
--- a/src/rust_string.rs
+++ b/src/rust_string.rs
@@ -1,14 +1,15 @@
use alloc::string::String;
-use core::mem;
+use core::mem::{self, MaybeUninit};
+// ABI compatible with C++ rust::String (not necessarily alloc::string::String).
#[repr(C)]
pub struct RustString {
- repr: String,
+ repr: [MaybeUninit<usize>; mem::size_of::<String>() / mem::size_of::<usize>()],
}
impl RustString {
pub fn from(s: String) -> Self {
- RustString { repr: s }
+ unsafe { mem::transmute::<String, RustString>(s) }
}
pub fn from_ref(s: &String) -> &Self {
@@ -20,17 +21,18 @@
}
pub fn into_string(self) -> String {
- self.repr
+ unsafe { mem::transmute::<RustString, String>(self) }
}
pub fn as_string(&self) -> &String {
- &self.repr
+ unsafe { &*(self as *const RustString as *const String) }
}
pub fn as_mut_string(&mut self) -> &mut String {
- &mut self.repr
+ unsafe { &mut *(self as *mut RustString as *mut String) }
}
}
-const_assert_eq!(mem::size_of::<[usize; 3]>(), mem::size_of::<String>());
-const_assert_eq!(mem::align_of::<usize>(), mem::align_of::<String>());
+const_assert_eq!(mem::size_of::<[usize; 3]>(), mem::size_of::<RustString>());
+const_assert_eq!(mem::size_of::<String>(), mem::size_of::<RustString>());
+const_assert_eq!(mem::align_of::<String>(), mem::align_of::<RustString>());