90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
|
|
|
|
// Check that we deal with cases where the instantiation of a class template
|
|
// recursively requires the instantiation of the same template.
|
|
namespace test1 {
|
|
template<typename T> struct A {
|
|
struct B { // expected-note {{not complete until the closing '}'}}
|
|
B b; // expected-error {{has incomplete type 'test1::A<int>::B'}}
|
|
};
|
|
B b; // expected-note {{in instantiation of}}
|
|
};
|
|
A<int> a; // expected-note {{in instantiation of}}
|
|
}
|
|
|
|
namespace test2 {
|
|
template<typename T> struct A {
|
|
struct B {
|
|
struct C {};
|
|
char c[1 + C()]; // expected-error {{invalid operands to binary expression}}
|
|
friend constexpr int operator+(int, C) { return 4; }
|
|
};
|
|
B b; // expected-note {{in instantiation of}}
|
|
};
|
|
A<int> a; // expected-note {{in instantiation of}}
|
|
}
|
|
|
|
namespace test3 {
|
|
// PR12317
|
|
template<typename T> struct A {
|
|
struct B {
|
|
enum { Val = 1 };
|
|
char c[1 + Val]; // ok
|
|
};
|
|
B b;
|
|
};
|
|
A<int> a;
|
|
}
|
|
|
|
namespace test4 {
|
|
template<typename T> struct M { typedef int type; };
|
|
template<typename T> struct A {
|
|
struct B { // expected-note {{not complete until the closing '}'}}
|
|
int k[typename A<typename M<T>::type>::B().k[0] + 1]; // expected-error {{incomplete type}}
|
|
};
|
|
B b; // expected-note {{in instantiation of}}
|
|
};
|
|
A<int> a; // expected-note {{in instantiation of}}
|
|
}
|
|
|
|
// FIXME: PR12298: Recursive constexpr function template instantiation leads to
|
|
// stack overflow.
|
|
#if 0
|
|
namespace test5 {
|
|
template<typename T> struct A {
|
|
constexpr T f(T k) { return g(k); }
|
|
constexpr T g(T k) {
|
|
return k ? f(k-1)+1 : 0;
|
|
}
|
|
};
|
|
// This should be accepted.
|
|
constexpr int x = A<int>().f(5);
|
|
}
|
|
|
|
namespace test6 {
|
|
template<typename T> constexpr T f(T);
|
|
template<typename T> constexpr T g(T t) {
|
|
typedef int arr[f(T())];
|
|
return t;
|
|
}
|
|
template<typename T> constexpr T f(T t) {
|
|
typedef int arr[g(T())];
|
|
return t;
|
|
}
|
|
// This should be ill-formed.
|
|
int n = f(0);
|
|
}
|
|
|
|
namespace test7 {
|
|
template<typename T> constexpr T g(T t) {
|
|
return t;
|
|
}
|
|
template<typename T> constexpr T f(T t) {
|
|
typedef int arr[g(T())];
|
|
return t;
|
|
}
|
|
// This should be accepted.
|
|
int n = f(0);
|
|
}
|
|
#endif
|