Implement From<&[char]> for GString

Author: Des-Nerger

godot-core/src/builtin/string/gstring.rs

@@ -225,6 +225,22 @@ impl From<&str> for GString {
     }
 }
 
+impl From<&[char]> for GString {
+    fn from(chars: &[char]) -> Self {
+        // SAFETY: `char` is by definition a valid Unicode scalar value.
+        unsafe {
+            Self::new_with_string_uninit(|string_ptr| {
+                let ctor = interface_fn!(string_new_with_utf32_chars_and_len);
+                ctor(
+                    string_ptr,
+                    chars.as_ptr() as *const sys::char32_t,
+                    chars.len() as i64,
+                );
+            })
+        }
+    }
+}
+
 impl From<String> for GString {
     fn from(value: String) -> Self {
         value.as_str().into()

itest/rust/src/builtin_tests/string/gstring_test.rs

@@ -69,12 +69,14 @@ fn string_chars() {
     // Empty tests regression from #228: Null pointer passed to slice::from_raw_parts().
     let string = GString::new();
     assert_eq!(string.chars(), &[]);
+    assert_eq!(string, GString::from([].as_slice()));
 
     let string = String::from("some_string");
     let string_chars: Vec<char> = string.chars().collect();
     let gstring = GString::from(string);
 
     assert_eq!(string_chars, gstring.chars().to_vec());
+    assert_eq!(gstring, GString::from(string_chars.as_slice()));
 }
 
 #[itest]