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// RUN: %clang_cc1 -std=c++2a -verify %s
namespace std_example {
namespace std { template<typename T> T &&move(T &); }
void g(...);
template <class... Args> void f(Args... args) {
auto lm = [&, args...] { return g(args...); };
lm();
auto lm2 = [... xs = std::move(args)] { return g(xs...); };
lm2();
}
}
template<typename ...T> constexpr int f(int k, T ...t) {
auto a = [...v = t] (bool b) mutable {
if (!b) {
((v += 1), ...);
return (__SIZE_TYPE__)0;
}
return (v * ... * 1) + sizeof...(v);
};
for (int i = 0; i != k; ++i)
a(false);
return a(true);
}
static_assert(f(1, 2, 3, 4) == 3 * 4 * 5 + 3);
static_assert(f(5) == 1);
auto q = [...x = 0] {}; // expected-error {{does not contain any unexpanded parameter packs}}
template<typename ...T> constexpr int nested(T ...t) {
return [...a = t] {
return [a...] {
return (a + ...);
}();
}();
}
static_assert(nested(1, 2, 3) == 6);
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