fix: fix schema index signature type check

kclvm/sema/src/resolver/test_data/index_signature_check.k

@@ -0,0 +1,8 @@
+schema Template:
+    [...str]: int
+    name: str
+
+t: Template = {
+    name: ""
+    id: 1
+}

kclvm/sema/src/resolver/tests.rs

@@ -886,3 +886,19 @@ fn test_builtin_file_invalid() {
         assert_eq!(diags[0].messages[0].message, *expected_message);
     }
 }
+
+#[test]
+fn test_schema_index_signature_check() {
+    let sess = Arc::new(ParseSession::default());
+    let mut program = load_program(
+        sess.clone(),
+        &["./src/resolver/test_data/index_signature_check.k"],
+        None,
+        None,
+    )
+    .unwrap()
+    .program;
+    let scope = resolve_program(&mut program);
+    let diags = scope.handler.diagnostics;
+    assert!(diags.is_empty())
+}

kclvm/sema/src/resolver/ty.rs

@@ -289,6 +289,21 @@ impl<'ctx> Resolver<'ctx> {
         range: &Range,
     ) -> bool {
         if let Some(index_signature) = &schema_ty.index_signature {
+            let val_ty = match (&key_ty.kind, &val_ty.kind) {
+                (TypeKind::Union(key_tys), TypeKind::Union(val_tys)) => {
+                    let mut index_signature_val_tys: Vec<TypeRef> = vec![];
+                    for (i, key_ty) in key_tys.iter().enumerate() {
+                        if let TypeKind::StrLit(s) = &key_ty.kind {
+                            if schema_ty.attrs.get(s).is_none() && val_tys.get(i).is_some() {
+                                index_signature_val_tys.push(val_tys.get(i).unwrap().clone());
+                            }
+                        }
+                    }
+                    crate::ty::sup(&index_signature_val_tys).into()
+                }
+                _ => val_ty,
+            };
+
             if !self.check_type(val_ty.clone(), index_signature.val_ty.clone(), range) {
                 self.handler.add_type_error(
                     &format!(
@@ -299,6 +314,7 @@ impl<'ctx> Resolver<'ctx> {
                     range.clone(),
                 );
             }
+
             if index_signature.any_other {
                 return self.check_type(key_ty, index_signature.key_ty.clone(), range)
                     && self.check_type(val_ty, index_signature.val_ty.clone(), range);