Add &str support for rs.

Signed-off-by: Tricster <[email protected]>

Author: MediosZ

source/loaders/rs_loader/rust/compiler/src/ast.rs

@@ -27,7 +27,7 @@ pub fn handle_ty(ty: &rustc_ast::Ty) -> FunctionParameter {
                 "f32" => result.ty = FunctionType::f32,
                 "f64" => result.ty = FunctionType::f64,
                 "bool" => result.ty = FunctionType::bool,
-                "str" => result.ty = FunctionType::str,
+                "str" => result.ty = FunctionType::String,
                 "Vec" => {
                     result.ty = FunctionType::Array;
                     if let Some(args) = &segment.args {

source/loaders/rs_loader/rust/compiler/src/wrapper/class.rs

@@ -555,7 +555,9 @@ impl ToMetaResult for String {
 
 impl ToMetaResult for &str {
     fn to_meta_result(self) -> Result<MetacallValue> {
-        Ok(unsafe { metacall_value_create_string(self.as_ptr() as *const i8, self.len()) })
+        let cstring = CString::new(self).expect("Unable to cast str to CString");
+        let ptr = cstring.as_ptr();
+        Ok(unsafe { metacall_value_create_string(ptr, self.len()) })
     }
 }
 

source/scripts/rust/basic/source/basic.rs

@@ -56,3 +56,12 @@ pub fn string_len(s: String) -> usize {
 pub fn new_string(idx: i32) -> String {
     format!("get number {idx}")
 }
+
+pub fn str_slice(s: &str) -> &str {
+    if s.len() < 4 {
+        return s;
+    } else {
+        println!("{:?}", &s[0..3]);
+        &s[0..3]
+    }
+}

source/tests/metacall_rust_test/source/metacall_rust_test.cpp

@@ -98,6 +98,12 @@ TEST_F(metacall_rust_test, DefaultConstructor)
 	// 	metacall_value_destroy(ret);
 	// }
 
+	{
+		void *ret = metacall("str_slice", "hellow");
+		EXPECT_EQ((int)0, (int)strcmp(metacall_value_to_string(ret), "hel"));
+		metacall_value_destroy(ret);
+	}
+
 	{
 		// test if we can return vec
 		void *ret_vec = metacall("return_vec");