forked from OSchip/llvm-project
26 lines
813 B
C++
26 lines
813 B
C++
// RUN: %clang_cc1 -std=c++2a -verify %s
|
|
|
|
template<typename ...T, typename ...Lambda> void check_sizes(Lambda ...L) {
|
|
static_assert(((sizeof(T) == sizeof(Lambda)) && ...));
|
|
}
|
|
|
|
template<typename ...T> void f(T ...v) {
|
|
// Pack expansion of lambdas: each lambda captures only one pack element.
|
|
check_sizes<T...>([=] { (void)&v; } ...);
|
|
|
|
// Pack expansion inside lambda: captures all pack elements.
|
|
auto l = [=] { ((void)&v, ...); };
|
|
static_assert(sizeof(l) >= (sizeof(T) + ...));
|
|
}
|
|
|
|
template void f(int, char, double);
|
|
|
|
namespace PR41576 {
|
|
template <class... Xs> constexpr int f(Xs ...xs) {
|
|
return [&](auto ...ys) { // expected-note {{instantiation}}
|
|
return ((xs + ys), ...); // expected-warning {{unused}}
|
|
}(1, 2);
|
|
}
|
|
static_assert(f(3, 4) == 6); // expected-note {{instantiation}}
|
|
}
|