test/SemaCXX/labeled-break-continue.cpp

// RUN: %clang_cc1 -std=c++20 -verify -fsyntax-only -fnamed-loops %s

int a[10]{};
struct S {
  int a[10]{};
};

void f1() {
  l1: for (int x : a) {
    break l1;
    continue l1;
  }

  l2: for (int x : a) {
    break l1; // expected-error {{'break' label does not name an enclosing loop or 'switch'}}
    continue l1; // expected-error {{'continue' label does not name an enclosing loop}}
  }

  l3: for (int x : a) {
    l4: for (int x : a) {
      break l3;
      break l4;
      continue l3;
      continue l4;
    }
  }
}

void f2() {
  l1: for (
    int x = ({
      break l1; // expected-error {{'break' label does not name an enclosing loop or 'switch'}}
      continue l1; // expected-error {{'continue' label does not name an enclosing loop}}
      1;
    });
    int y : ({
      break l1; // expected-error {{'break' label does not name an enclosing loop or 'switch'}}
      continue l1; // expected-error {{'continue' label does not name an enclosing loop}}
      S();
    }).a
  ) {}
}

void f3() {
  a: while (true) {
    (void) []{
      break a; // expected-error {{'break' label does not name an enclosing loop or 'switch'}}
      continue a; // expected-error {{'continue' label does not name an enclosing loop}}
    };
  }
}