Add exported_fn tests for rhai_fn in module

codegen/ui_tests/export_mod_missing_value.rs

@@ -0,0 +1,27 @@
+use rhai::plugin::*;
+
+#[derive(Clone)]
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[export_module]
+pub mod test_mod {
+#[rhai_fn(name)]
+pub fn test_fn(input: Point) -> bool {
+    input.x > input.y
+}
+}
+
+fn main() {
+    let n = Point {
+        x: 0.0,
+        y: 10.0,
+    };
+    if test_mod::test_fn(n) {
+        println!("yes");
+    } else {
+        println!("no");
+    }
+}