fix

Author: ludviggunne

lib/checkfunctions.cpp

@@ -329,6 +329,8 @@ void CheckFunctionsImpl::checkMissingReturn()
             continue;
         if (Function::returnsVoid(function, true))
             continue;
+        if (Function::isCoroutine(function))
+            continue;
         const Token *errorToken = checkMissingReturnScope(scope->bodyEnd, mSettings.library);
         if (errorToken)
             missingReturnError(errorToken);

lib/symboldatabase.cpp

@@ -3407,6 +3407,18 @@ bool Function::returnsVoid(const Function* function, bool unknown)
     });
 }
 
+bool Function::isCoroutine(const Function* function)
+{
+    if (!function->functionScope)
+        return false;
+    const Scope *scope = function->functionScope;
+    for (const Token *tok = scope->bodyStart; tok != scope->bodyEnd; tok = tok->next()) {
+        if (Token::Match(tok, "co_return|co_await|co_yield"))
+            return true;
+    }
+    return false;
+}
+
 std::vector<const Token*> Function::findReturns(const Function* f)
 {
     std::vector<const Token*> result;

lib/symboldatabase.h

@@ -945,6 +945,7 @@ class CPPCHECKLIB Function {
     static bool returnsStandardType(const Function* function, bool unknown = false);
 
     static bool returnsVoid(const Function* function, bool unknown = false);
+    static bool isCoroutine(const Function* function);
 
     static std::vector<const Token*> findReturns(const Function* f);