| // RUN: %clang_cc1 -std=c++1y %s -verify |
| |
| const char *has_no_member = [x("hello")] {}.x; // expected-error {{no member named 'x'}} |
| |
| double f; |
| auto with_float = [f(1.0f)] { |
| using T = decltype(f); |
| using T = float; |
| }; |
| auto with_float_2 = [&f(f)] { // ok, refers to outer f |
| using T = decltype(f); |
| using T = double&; |
| }; |
| |
| // Within the lambda-expression's compound-statement, |
| // the identifier in the init-capture hides any declaration |
| // of the same name in scopes enclosing the lambda-expression. |
| void hiding() { |
| char c; |
| (void) [c("foo")] { |
| static_assert(sizeof(c) == sizeof(const char*), ""); |
| }; |
| (void) [c("bar")] () -> decltype(c) { // outer c, not init-capture |
| return "baz"; // expected-error {{cannot initialize}} |
| }; |
| } |
| |
| struct ExplicitCopy { |
| ExplicitCopy(); // expected-note 2{{not viable}} |
| explicit ExplicitCopy(const ExplicitCopy&); |
| }; |
| auto init_kind_1 = [ec(ExplicitCopy())] {}; |
| auto init_kind_2 = [ec = ExplicitCopy()] {}; // expected-error {{no matching constructor}} |
| |
| template<typename T> void init_kind_template() { |
| auto init_kind_1 = [ec(T())] {}; |
| auto init_kind_2 = [ec = T()] {}; // expected-error {{no matching constructor}} |
| } |
| template void init_kind_template<int>(); |
| template void init_kind_template<ExplicitCopy>(); // expected-note {{instantiation of}} |
| |
| void void_fn(); |
| int overload_fn(); |
| int overload_fn(int); |
| |
| auto bad_init_1 = [a()] {}; // expected-error {{expected expression}} |
| auto bad_init_2 = [a(1, 2)] {}; // expected-error {{initializer for lambda capture 'a' contains multiple expressions}} |
| auto bad_init_3 = [&a(void_fn())] {}; // expected-error {{cannot form a reference to 'void'}} |
| auto bad_init_4 = [a(void_fn())] {}; // expected-error {{has incomplete type 'void'}} |
| auto bad_init_5 = [a(overload_fn)] {}; // expected-error {{cannot deduce type for lambda capture 'a' from initializer of type '<overloaded function}} |
| auto bad_init_6 = [a{overload_fn}] {}; // expected-error {{cannot deduce type for lambda capture 'a' from initializer list}} |
| auto bad_init_7 = [a{{1}}] {}; // expected-error {{cannot deduce type for lambda capture 'a' from nested initializer list}} |
| |
| template<typename...T> void pack_1(T...t) { (void)[a(t...)] {}; } // expected-error {{initializer missing for lambda capture 'a'}} |
| template void pack_1<>(); // expected-note {{instantiation of}} |
| |
| // FIXME: Might need lifetime extension for the temporary here. |
| // See DR1695. |
| auto a = [a(4), b = 5, &c = static_cast<const int&&>(0)] { |
| static_assert(sizeof(a) == sizeof(int), ""); |
| static_assert(sizeof(b) == sizeof(int), ""); |
| using T = decltype(c); |
| using T = const int &; |
| }; |
| auto b = [a{0}] {}; // OK, per N3922 |
| |
| struct S { S(); S(S&&); }; |
| template<typename T> struct remove_reference { typedef T type; }; |
| template<typename T> struct remove_reference<T&> { typedef T type; }; |
| template<typename T> decltype(auto) move(T &&t) { return static_cast<typename remove_reference<T>::type&&>(t); } |
| auto s = [s(move(S()))] {}; |
| |
| template<typename T> T instantiate_test(T t) { |
| [x(&t)]() { *x = 1; } (); // expected-error {{assigning to 'const char *'}} |
| return t; |
| } |
| int instantiate_test_1 = instantiate_test(0); |
| const char *instantiate_test_2 = instantiate_test("foo"); // expected-note {{here}} |