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comparison clang/test/Parser/cxx11-templates.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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147:c2174574ed3a 150:1d019706d866
1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2
3 struct 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
8 template <typename Ty = char>
9 static_assert(sizeof(Ty) != 1, "Not a char"); // expected-error {{a static_assert declaration cannot be a template}}
10
11 namespace 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(T
18 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 where
38 // 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 be
40 // 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 }