p5.cpp revision ef7d78bd5be466c369b04af742ed8268244d4fe7 
1// RUN: %clang_cc1 -std=c++11 %s -Winvalid-noreturn -verify
2
3// An attribute-specifier-seq in a lambda-declarator appertains to the
4// type of the corresponding function call operator.
5void test_attributes() {
6  auto nrl = []() [[noreturn]] {}; // expected-warning{{function declared 'noreturn' should not return}}
7}
8
9template<typename T>
10struct bogus_override_if_virtual : public T {
11  int operator()() const;
12};
13
14void test_quals() {
15  // This function call operator is declared const (9.3.1) if and only
16  // if the lambda- expression's parameter-declaration-clause is not
17  // followed by mutable.
18  auto l = [=](){}; // expected-note{{method is not marked volatile}}
19  const decltype(l) lc = l;
20  l();
21  lc();
22
23  auto ml = [=]() mutable{}; // expected-note{{method is not marked const}} \
24                             // expected-note{{method is not marked volatile}}
25  const decltype(ml) mlc = ml;
26  ml();
27  mlc(); // expected-error{{no matching function for call to object of type}}
28
29  // It is neither virtual nor declared volatile.
30  volatile decltype(l) lv = l;
31  volatile decltype(ml) mlv = ml;
32  lv(); // expected-error{{no matching function for call to object of type}}
33  mlv(); // expected-error{{no matching function for call to object of type}}
34
35  bogus_override_if_virtual<decltype(l)> bogus;
36}
37
38// Default arguments (8.3.6) shall not be specified in the
39// parameter-declaration-clause of a lambda- declarator.
40int test_default_args() {
41  return [](int i = 5,  // expected-error{{default arguments can only be specified for parameters in a function declaration}}
42            int j = 17) { return i+j;}(5, 6); // expected-error{{default arguments can only be specified for parameters in a function declaration}}
43}
44
45// Any exception-specification specified on a lambda-expression
46// applies to the corresponding function call operator.
47void test_exception_spec() {
48  auto tl1 = []() throw(int) {};
49  auto tl2 = []() {};
50  static_assert(!noexcept(tl1()), "lambda can throw");
51  static_assert(!noexcept(tl2()), "lambda can throw");
52
53  auto ntl1 = []() throw() {};
54  auto ntl2 = []() noexcept(true) {};
55  auto ntl3 = []() noexcept {};
56  static_assert(noexcept(ntl1()), "lambda cannot throw");
57  static_assert(noexcept(ntl2()), "lambda cannot throw");
58  static_assert(noexcept(ntl3()), "lambda cannot throw");
59}
60
61