47 lines · cpp
1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s2 3struct S {4 template <typename Ty = char>5 static_assert(sizeof(Ty) != 1, "Not a char"); // expected-error {{a static_assert declaration cannot be a template}}6};7 8template <typename Ty = char>9static_assert(sizeof(Ty) != 1, "Not a char"); // expected-error {{a static_assert declaration cannot be a template}}10 11namespace Ellipsis {12 template<typename ...T> void f(T t..., int n); // expected-error {{must immediately precede declared identifier}}13 template<typename ...T> void f(int n, T t...); // expected-error {{must immediately precede declared identifier}}14 template<typename ...T> void f(int n, T t, ...); // expected-error {{unexpanded parameter pack}}15 template<typename ...T> void f() {16 f([]{17 void g(T18 t // expected-note {{place '...' immediately before declared identifier to declare a function parameter pack}}19 ... // expected-warning {{'...' in this location creates a C-style varargs function, not a function parameter pack}}20 // expected-note@-1 {{insert ',' before '...' to silence this warning}}21 );22 void h(T (&23 ) // expected-note {{place '...' here to declare a function parameter pack}}24 ... // expected-warning {{'...' in this location creates a C-style varargs function, not a function parameter pack}}25 // expected-note@-1 {{insert ',' before '...' to silence this warning}}26 );27 void i(T (&), ...);28 }...);29 }30 template<typename ...T> struct S {31 void f(T t...); // expected-error {{must immediately precede declared identifier}}32 void f(T ... // expected-note {{preceding '...' declares a function parameter pack}}33 t...); // expected-warning-re {{'...' in this location creates a C-style varargs function{{$}}}}34 // expected-note@-1 {{insert ',' before '...' to silence this warning}}35 };36 37 // FIXME: We should just issue a single error in this case pointing out where38 // the '...' goes. It's tricky to recover correctly in this case, though,39 // because the parameter is in scope in the default argument, so must be40 // passed to Sema before we reach the ellipsis.41 template<typename...T> void f(T n = 1 ...);42 // expected-warning@-1 {{creates a C-style varargs}}43 // expected-note@-2 {{place '...' immediately before declared identifier}}44 // expected-note@-3 {{insert ','}}45 // expected-error@-4 {{unexpanded parameter pack}}46}47