forked from OSchip/llvm-project
90 lines
1.8 KiB
C++
90 lines
1.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
|
|
// expected-no-diagnostics
|
|
|
|
// Test default template arguments for function templates.
|
|
template<typename T = int>
|
|
void f0();
|
|
|
|
template<typename T>
|
|
void f0();
|
|
|
|
void g0() {
|
|
f0(); // okay!
|
|
}
|
|
|
|
template<typename T, int N = T::value>
|
|
int &f1(T);
|
|
|
|
float &f1(...);
|
|
|
|
struct HasValue {
|
|
static const int value = 17;
|
|
};
|
|
|
|
void g1() {
|
|
float &fr = f1(15);
|
|
int &ir = f1(HasValue());
|
|
}
|
|
|
|
namespace PR16689 {
|
|
template <typename T1, typename T2> class tuple {
|
|
public:
|
|
template <typename = T2>
|
|
constexpr tuple() {}
|
|
};
|
|
template <class X, class... Y> struct a : public X {
|
|
using X::X;
|
|
};
|
|
auto x = a<tuple<int, int> >();
|
|
}
|
|
|
|
namespace PR16975 {
|
|
template <typename...> struct is {
|
|
constexpr operator bool() const { return false; }
|
|
};
|
|
|
|
template <typename... Types>
|
|
struct bar {
|
|
template <typename T,
|
|
bool = is<Types...>()>
|
|
bar(T);
|
|
};
|
|
|
|
bar<> foo{0};
|
|
|
|
struct baz : public bar<> {
|
|
using bar::bar;
|
|
};
|
|
|
|
baz data{0};
|
|
}
|
|
|
|
// rdar://23810407
|
|
// An IRGen failure due to a symbol collision due to a default argument
|
|
// being instantiated twice. Credit goes to Richard Smith for this
|
|
// reduction to a -fsyntax-only failure.
|
|
namespace rdar23810407 {
|
|
// Instantiating the default argument multiple times will produce two
|
|
// different lambda types and thus instantiate this function multiple
|
|
// times, which will produce conflicting extern variable declarations.
|
|
template<typename T> int f(T t) {
|
|
extern T rdar23810407_variable;
|
|
return 0;
|
|
}
|
|
template<typename T> int g(int a = f([] {}));
|
|
void test() {
|
|
g<int>();
|
|
g<int>();
|
|
}
|
|
}
|
|
|
|
// rdar://problem/24480205
|
|
namespace PR13986 {
|
|
constexpr unsigned Dynamic = 0;
|
|
template <unsigned> class A { template <unsigned = Dynamic> void m_fn1(); };
|
|
class Test {
|
|
~Test() {}
|
|
A<1> m_target;
|
|
};
|
|
}
|