1 // RUN: %clang_cc1 -std=c++1y %s -verify
2
__anonfd9656430102null3 const char *has_no_member = [x("hello")] {}.x; // expected-error {{no member named 'x'}}
4
5 double f;
__anonfd9656430202null6 auto with_float = [f(1.0f)] {
7 using T = decltype(f);
8 using T = float;
9 };
__anonfd9656430302null10 auto with_float_2 = [&f(f)] { // ok, refers to outer f
11 using T = decltype(f);
12 using T = double&;
13 };
14
15 // Within the lambda-expression's compound-statement,
16 // the identifier in the init-capture hides any declaration
17 // of the same name in scopes enclosing the lambda-expression.
hiding()18 void hiding() {
19 char c;
20 (void) [c("foo")] {
21 static_assert(sizeof(c) == sizeof(const char*), "");
22 };
23 (void) [c("bar")] () -> decltype(c) { // outer c, not init-capture
24 return "baz"; // expected-error {{cannot initialize}}
25 };
26 }
27
28 struct ExplicitCopy {
29 ExplicitCopy(); // expected-note 2{{not viable}}
30 explicit ExplicitCopy(const ExplicitCopy&); // expected-note 2{{not a candidate}}
31 };
__anonfd9656430502null32 auto init_kind_1 = [ec(ExplicitCopy())] {};
__anonfd9656430602null33 auto init_kind_2 = [ec = ExplicitCopy()] {}; // expected-error {{no matching constructor}}
34
init_kind_template()35 template<typename T> void init_kind_template() {
36 auto init_kind_1 = [ec(T())] {};
37 auto init_kind_2 = [ec = T()] {}; // expected-error {{no matching constructor}}
38 }
39 template void init_kind_template<int>();
40 template void init_kind_template<ExplicitCopy>(); // expected-note {{instantiation of}}
41
42 void void_fn();
43 int overload_fn();
44 int overload_fn(int);
45
__anonfd9656430902null46 auto bad_init_1 = [a()] {}; // expected-error {{expected expression}}
__anonfd9656430a02null47 auto bad_init_2 = [a(1, 2)] {}; // expected-error {{initializer for lambda capture 'a' contains multiple expressions}}
__anonfd9656430b02null48 auto bad_init_3 = [&a(void_fn())] {}; // expected-error {{cannot form a reference to 'void'}}
__anonfd9656430c02null49 auto bad_init_4 = [a(void_fn())] {}; // expected-error {{has incomplete type 'void'}}
__anonfd9656430d02null50 auto bad_init_5 = [a(overload_fn)] {}; // expected-error {{cannot deduce type for lambda capture 'a' from initializer of type '<overloaded function}}
__anonfd9656430e02null51 auto bad_init_6 = [a{overload_fn}] {}; // expected-error {{cannot deduce type for lambda capture 'a' from initializer list}}
__anonfd9656430f02null52 auto bad_init_7 = [a{{1}}] {}; // expected-error {{cannot deduce type for lambda capture 'a' from nested initializer list}}
53
__anonfd9656431002null54 template<typename...T> void pack_1(T...t) { (void)[a(t...)] {}; } // expected-error {{initializer missing for lambda capture 'a'}}
55 template void pack_1<>(); // expected-note {{instantiation of}}
56
57 // FIXME: Might need lifetime extension for the temporary here.
58 // See DR1695.
__anonfd9656431102null59 auto a = [a(4), b = 5, &c = static_cast<const int&&>(0)] {
60 static_assert(sizeof(a) == sizeof(int), "");
61 static_assert(sizeof(b) == sizeof(int), "");
62 using T = decltype(c);
63 using T = const int &;
64 };
__anonfd9656431202null65 auto b = [a{0}] {}; // OK, per N3922
66
67 struct S { S(); S(S&&); };
68 template<typename T> struct remove_reference { typedef T type; };
69 template<typename T> struct remove_reference<T&> { typedef T type; };
move(T && t)70 template<typename T> decltype(auto) move(T &&t) { return static_cast<typename remove_reference<T>::type&&>(t); }
__anonfd9656431302null71 auto s = [s(move(S()))] {};
72
instantiate_test(T t)73 template<typename T> T instantiate_test(T t) {
74 [x(&t)]() { *x = 1; } (); // expected-error {{assigning to 'const char *'}}
75 return t;
76 }
77 int instantiate_test_1 = instantiate_test(0);
78 const char *instantiate_test_2 = instantiate_test("foo"); // expected-note {{here}}
79