34 lines · cpp
1// RUN: %clang_cc1 -std=c++11 %s -Wunused -Wno-unused-lambda-capture -Wno-c++14-extensions -verify2// RUN: %clang_cc1 -std=c++17 %s -Wunused -Wno-unused-lambda-capture -Wno-c++14-extensions -verify3 4 5const int global = 0;6 7void f2() {8 int i = 1;9 void g1(int = ([i]{ return i; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}10 void g2(int = ([i]{ return 0; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}11 void g3(int = ([=]{ return i; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}12 void g4(int = ([=]{ return 0; })());13 void g5(int = ([]{ return sizeof i; })());14 void g6(int = ([x=1, y = global, &z = global]{ return x; })());15 void g7(int = ([x=i, &y=i]{ return x; })()); // expected-error 2{{default argument references local variable 'i' of enclosing function}}16}17 18#if __cplusplus >= 201703L19int global_array[] = { 1, 2 };20auto [ga, gb] = global_array;21 22void structured_bindings() {23 int array[] = { 1, 2 };24 auto [a, b] = array;25 void func(int c = [x = a, &xref = a, y = ga, &yref = ga] { return x; }()); // expected-error 2{{default argument references local variable 'a' of enclosing function}}26}27#endif28 29namespace lambda_in_default_args {30 int f(int = [] () -> int { int n; return ++n; } ());31 template<typename T> T g(T = [] () -> T { T n; return ++n; } ());32 int k = f() + g<int>();33}34