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