mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 10:52:30 +00:00
26 lines
695 B
C++
26 lines
695 B
C++
#pragma once
|
|
|
|
#include <Common/typeid_cast.h>
|
|
#include <base/TypeList.h>
|
|
|
|
namespace DB
|
|
{
|
|
template <typename... Ts, typename T, typename F>
|
|
static bool castTypeToEither(const T * type, F && f)
|
|
{
|
|
/// XXX can't use && here because gcc-7 complains about parentheses around && within ||
|
|
return ((typeid_cast<const Ts *>(type) ? f(*typeid_cast<const Ts *>(type)) : false) || ...);
|
|
}
|
|
|
|
template <class ...Args>
|
|
constexpr bool castTypeToEither(TypeList<Args...>, const auto * type, auto && f)
|
|
{
|
|
return (
|
|
(typeid_cast<const Args *>(type) != nullptr
|
|
? std::forward<decltype(f)>(f)(
|
|
*typeid_cast<const Args *>(type))
|
|
: false)
|
|
|| ...);
|
|
}
|
|
}
|