Add base for testing unions rust.

Author: viferga

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

@@ -64,3 +64,22 @@ pub fn str_slice(s: &str) -> &str {
         &s[0..3]
     }
 }
+
+// TODO
+/*
+pub fn age_group(age: i32) -> Result<String, String> {
+    let valid_age = match age {
+        _ if age < 0 => return Err("not born yet".to_string()),
+        _ if age > 150 => return Err("seriously?!!".to_string()),
+        validated => validated,
+    };
+
+    let result = match valid_age {
+        _ if age < 10 => "child".to_string(),
+        _ if age >= 18 => "adult".to_string(),
+        a => format!("teenager of {} years old", a),
+    };
+
+    Ok(result)
+}
+*/

source/tests/metacall_rust_test/source/metacall_rust_test.cpp

@@ -154,6 +154,18 @@ TEST_F(metacall_rust_test, DefaultConstructor)
 		metacall_value_destroy(ret);
 	}
 
+	/* TODO */
+	/*
+	{
+		// test if we can return result
+		void *ret = metacall("age_group", 21);
+
+		// TODO
+
+		metacall_value_destroy(ret);
+	}
+	*/
+
 	/* Print inspect information */
 	{
 		size_t size = 0;