14 lines · cpp
1// RUN: %clang_cc1 %s -fsyntax-only -verify -fms-compatibility2 3struct S {4 mutable int &a; // expected-warning {{'mutable' on a reference type is a Microsoft extension}}5 S(int &b) : a(b) {}6};7 8int main() {9 int a = 0;10 const S s(a);11 s.a = 10;12 return s.a + a;13}14