From 6d696821d42e7056c35262432d2aace641ce5631 Mon Sep 17 00:00:00 2001
From: daizihan <daizihan@huawei.com>
Date: Sat, 13 Sep 2025 09:10:33 +0800
Subject: [PATCH] Add warning for await in non-async

Issue:  https://gitee.com/openharmony/arkcompiler_ets_frontend/issues/ICXT3D?from=project-issue
Signed-off-by: daizihan <daizihan@huawei.com>
---
 ets2panda/checker/ETSAnalyzer.cpp      | 18 ++++++++++++++++++
 ets2panda/util/diagnostic/warning.yaml |  6 +++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/ets2panda/checker/ETSAnalyzer.cpp b/ets2panda/checker/ETSAnalyzer.cpp
index 4498536bb1..03a2de55d3 100644
--- a/ets2panda/checker/ETSAnalyzer.cpp
+++ b/ets2panda/checker/ETSAnalyzer.cpp
@@ -1473,6 +1473,20 @@ std::tuple<Type *, ir::Expression *> ETSAnalyzer::CheckAssignmentExprOperatorTyp
     return {sourceType, relationNode};
 }
 
+static bool CheckAwaitExpressionInAsyncFunc(ir::AwaitExpression *expr)
+{
+    ir::AstNode *node = expr;
+    while (node != nullptr) {
+        if (node->IsScriptFunction() &&
+            (node->AsScriptFunction()->IsAsyncFunc() || node->AsScriptFunction()->IsAsyncImplFunc())) {
+            return true;
+        } else {
+            node = node->Parent();
+        }
+    }
+    return false;
+}
+
 checker::Type *ETSAnalyzer::Check(ir::AwaitExpression *expr) const
 {
     ETSChecker *checker = GetETSChecker();
@@ -1480,6 +1494,10 @@ checker::Type *ETSAnalyzer::Check(ir::AwaitExpression *expr) const
         return expr->TsType();
     }
 
+    if (!CheckAwaitExpressionInAsyncFunc(expr)) {
+        return checker->TypeError(expr, diagnostic::AWAIT_IN_NON_ASYNC_DEPRECATED, expr->Argument()->Start());
+    }
+
     expr->SetTsType(checker->HandleAwaitExpression(expr->argument_->Check(checker), expr));
     return expr->TsType();
 }
diff --git a/ets2panda/util/diagnostic/warning.yaml b/ets2panda/util/diagnostic/warning.yaml
index dcb80bf69a..62bcd11c94 100644
--- a/ets2panda/util/diagnostic/warning.yaml
+++ b/ets2panda/util/diagnostic/warning.yaml
@@ -21,6 +21,11 @@ warning:
   id: 16
   message: "Cannot assign to '{}' because it is a read-only property."
 
+
+- name: AWAIT_IN_NON_ASYNC_DEPRECATED
+  id: 173979
+  message: "Await in non-aysnc function is deprecated, please move it to async function."
+
 - name: BOOST_EQUALITY_STATEMENT
   id: 4
   message: "Boost Equality Statement. Change sides of binary expression."
@@ -125,7 +130,6 @@ warning:
   id: 26
   message: "Unreachable statement."
   code_fix_ids: [FixUnreachableCode]
-
 graveyard:
 - 18
 - 19
-- 
Gitee