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