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// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++11 %s
// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++2a %s
enum E { e };
constexpr int id(int n) { return n; }
class C {
int f() {
int foo, bar;
[]; // expected-error {{expected body of lambda expression}}
[+] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[foo+] {}; // expected-error {{expected ',' or ']' in lambda capture list}}
[foo,&this] {}; // expected-error {{'this' cannot be captured by reference}}
[&this] {}; // expected-error {{'this' cannot be captured by reference}}
[&,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[=,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[] {};
[=] (int i) {};
[&] (int) mutable -> void {};
[foo,bar] () { return 3; };
[=,&foo] () {};
[&,foo] () {};
[this] () {};
[] () -> class C { return C(); };
[] () -> enum E { return e; };
[] -> int { return 0; }; // expected-error{{lambda requires '()' before return type}}
[] mutable -> int { return 0; }; // expected-error{{lambda requires '()' before 'mutable'}}
[](int) -> {}; // PR13652 expected-error {{expected a type}}
return 1;
}
void designator_or_lambda() {
typedef int T;
const int b = 0;
const int c = 1;
int d;
int a1[1] = {[b] (T()) {}}; // expected-error{{no viable conversion from '(lambda}}
int a2[1] = {[b] = 1 };
int a3[1] = {[b,c] = 1 }; // expected-error{{expected ']'}} expected-note {{to match}}
int a4[1] = {[&b] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'const int *'}}
int a5[3] = { []{return 0;}() };
int a6[1] = {[this] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'C *'}}
int a7[1] = {[d(0)] { return d; } ()};
int a8[1] = {[d = 0] { return d; } ()};
int a10[1] = {[id(0)] { return id; } ()};
#if __cplusplus <= 201103L
// expected-warning@-4{{extension}}
// expected-warning@-4{{extension}}
// expected-warning@-4{{extension}}
#endif
int a9[1] = {[d = 0] = 1}; // expected-error{{is not an integral constant expression}}
#if __cplusplus >= 201402L
// expected-note@-2{{constant expression cannot modify an object that is visible outside that expression}}
#endif
int a11[1] = {[id(0)] = 1};
}
void delete_lambda(int *p) {
delete [] p;
delete [] (int*) { new int }; // ok, compound-literal, not lambda
delete [] { return new int; } (); // expected-error {{'[]' after delete interpreted as 'delete[]'}}
delete [&] { return new int; } (); // ok, lambda
delete []() { return new int; }(); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
delete [](E Enum) { return new int((int)Enum); }(e); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
#if __cplusplus > 201703L
delete []<int = 0>() { return new int; }(); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
#endif
}
// We support init-captures in C++11 as an extension.
int z;
void init_capture() {
[n(0)] () mutable -> int { return ++n; };
[n{0}] { return; };
[a([&b = z]{})](){};
[n = 0] { return ++n; }; // expected-error {{captured by copy in a non-mutable}}
[n = {0}] { return; }; // expected-error {{<initializer_list>}}
#if __cplusplus <= 201103L
// expected-warning@-6{{extension}}
// expected-warning@-6{{extension}}
// expected-warning@-6{{extension}}
// expected-warning@-7{{extension}}
// expected-warning@-7{{extension}}
// expected-warning@-7{{extension}}
#endif
int x = 4;
auto y = [&r = x, x = x + 1]() -> int {
#if __cplusplus <= 201103L
// expected-warning@-2{{extension}}
// expected-warning@-3{{extension}}
#endif
r += 2;
return x + 2;
} ();
}
void attributes() {
[] [[]] {}; // expected-error {{lambda requires '()' before attribute specifier}}
[] __attribute__((noreturn)) {}; // expected-error {{lambda requires '()' before attribute specifier}}
[]() [[]]
mutable {}; // expected-error {{expected body of lambda expression}}
[]() [[]] {};
[]() [[]] -> void {};
[]() mutable [[]] -> void {};
[]() mutable noexcept [[]] -> void {};
// Testing GNU-style attributes on lambdas -- the attribute is specified
// before the mutable specifier instead of after (unlike C++11).
[]() __attribute__((noreturn)) mutable { while(1); };
[]() mutable
__attribute__((noreturn)) { while(1); }; // expected-error {{expected body of lambda expression}}
}
};
template <typename>
void PR22122() {
[](int) -> {}; // expected-error {{expected a type}}
}
template void PR22122<int>();
struct S {
template <typename T>
void m (T x =[0); // expected-error{{expected variable name or 'this' in lambda capture list}}
} s;
struct U {
template <typename T>
void m_fn1(T x = 0[0); // expected-error{{expected ']'}} expected-note{{to match this '['}}
} *U;
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