================
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 %s -fsyntax-only -pedantic -verify -std=c17
+// RUN: %clang_cc1 %s -fsyntax-only -pedantic -verify -std=c2y
+// RUN: %clang_cc1 %s -fsyntax-only -pedantic -verify -x c++ -std=c++17
+
+// expected-no-diagnostics
+
+int f(int);
+
+void cond(int a) {
+ if (__extension__ ({ int r = f(a); r; })) {}
+ while (__extension__ ({ int r = f(a); r; })) { break; }
+ switch (__extension__ ({ int r = f(a); r; })) { default: break; }
+ do {} while (__extension__ ({ int r = f(a); r; }));
+ for (; __extension__ ({ int r = f(a); r; });) { break; }
+}
----------------
zhangweize9-cyber wrote:
You can try the test case `int r = ({ ; });` to see if it passes the test.
https://github.com/llvm/llvm-project/pull/221623
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