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authorvitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
committervitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
commit6ffe9e53658409f212834330e13564e4952558f6 (patch)
tree85b1e00183517648b228aafa7c8fb07f5276f419 /contrib/libs/llvm14/include/llvm/ADT/Any.h
parent726057070f9c5a91fc10fde0d5024913d10f1ab9 (diff)
downloadydb-6ffe9e53658409f212834330e13564e4952558f6.tar.gz
YQ Connector: support managed ClickHouse
Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.
Diffstat (limited to 'contrib/libs/llvm14/include/llvm/ADT/Any.h')
-rw-r--r--contrib/libs/llvm14/include/llvm/ADT/Any.h168
1 files changed, 168 insertions, 0 deletions
diff --git a/contrib/libs/llvm14/include/llvm/ADT/Any.h b/contrib/libs/llvm14/include/llvm/ADT/Any.h
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+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- Any.h - Generic type erased holder of any type -----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file provides Any, a non-template class modeled in the spirit of
+/// std::any. The idea is to provide a type-safe replacement for C's void*.
+/// It can hold a value of any copy-constructible copy-assignable type
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ADT_ANY_H
+#define LLVM_ADT_ANY_H
+
+#include "llvm/ADT/STLForwardCompat.h"
+#include "llvm/Support/Compiler.h"
+
+#include <cassert>
+#include <memory>
+#include <type_traits>
+
+namespace llvm {
+
+class LLVM_EXTERNAL_VISIBILITY Any {
+
+ // The `Typeid<T>::Id` static data member below is a globally unique
+ // identifier for the type `T`. It is explicitly marked with default
+ // visibility so that when `-fvisibility=hidden` is used, the loader still
+ // merges duplicate definitions across DSO boundaries.
+ template <typename T> struct TypeId { static const char Id; };
+
+ struct StorageBase {
+ virtual ~StorageBase() = default;
+ virtual std::unique_ptr<StorageBase> clone() const = 0;
+ virtual const void *id() const = 0;
+ };
+
+ template <typename T> struct StorageImpl : public StorageBase {
+ explicit StorageImpl(const T &Value) : Value(Value) {}
+
+ explicit StorageImpl(T &&Value) : Value(std::move(Value)) {}
+
+ std::unique_ptr<StorageBase> clone() const override {
+ return std::make_unique<StorageImpl<T>>(Value);
+ }
+
+ const void *id() const override { return &TypeId<T>::Id; }
+
+ T Value;
+
+ private:
+ StorageImpl &operator=(const StorageImpl &Other) = delete;
+ StorageImpl(const StorageImpl &Other) = delete;
+ };
+
+public:
+ Any() = default;
+
+ Any(const Any &Other)
+ : Storage(Other.Storage ? Other.Storage->clone() : nullptr) {}
+
+ // When T is Any or T is not copy-constructible we need to explicitly disable
+ // the forwarding constructor so that the copy constructor gets selected
+ // instead.
+ template <typename T,
+ std::enable_if_t<
+ llvm::conjunction<
+ llvm::negation<std::is_same<std::decay_t<T>, Any>>,
+ // We also disable this overload when an `Any` object can be
+ // converted to the parameter type because in that case,
+ // this constructor may combine with that conversion during
+ // overload resolution for determining copy
+ // constructibility, and then when we try to determine copy
+ // constructibility below we may infinitely recurse. This is
+ // being evaluated by the standards committee as a potential
+ // DR in `std::any` as well, but we're going ahead and
+ // adopting it to work-around usage of `Any` with types that
+ // need to be implicitly convertible from an `Any`.
+ llvm::negation<std::is_convertible<Any, std::decay_t<T>>>,
+ std::is_copy_constructible<std::decay_t<T>>>::value,
+ int> = 0>
+ Any(T &&Value) {
+ Storage =
+ std::make_unique<StorageImpl<std::decay_t<T>>>(std::forward<T>(Value));
+ }
+
+ Any(Any &&Other) : Storage(std::move(Other.Storage)) {}
+
+ Any &swap(Any &Other) {
+ std::swap(Storage, Other.Storage);
+ return *this;
+ }
+
+ Any &operator=(Any Other) {
+ Storage = std::move(Other.Storage);
+ return *this;
+ }
+
+ bool hasValue() const { return !!Storage; }
+
+ void reset() { Storage.reset(); }
+
+private:
+ template <class T> friend T any_cast(const Any &Value);
+ template <class T> friend T any_cast(Any &Value);
+ template <class T> friend T any_cast(Any &&Value);
+ template <class T> friend const T *any_cast(const Any *Value);
+ template <class T> friend T *any_cast(Any *Value);
+ template <typename T> friend bool any_isa(const Any &Value);
+
+ std::unique_ptr<StorageBase> Storage;
+};
+
+template <typename T> const char Any::TypeId<T>::Id = 0;
+
+
+template <typename T> bool any_isa(const Any &Value) {
+ if (!Value.Storage)
+ return false;
+ return Value.Storage->id() == &Any::TypeId<remove_cvref_t<T>>::Id;
+}
+
+template <class T> T any_cast(const Any &Value) {
+ return static_cast<T>(*any_cast<remove_cvref_t<T>>(&Value));
+}
+
+template <class T> T any_cast(Any &Value) {
+ return static_cast<T>(*any_cast<remove_cvref_t<T>>(&Value));
+}
+
+template <class T> T any_cast(Any &&Value) {
+ return static_cast<T>(std::move(*any_cast<remove_cvref_t<T>>(&Value)));
+}
+
+template <class T> const T *any_cast(const Any *Value) {
+ using U = remove_cvref_t<T>;
+ assert(Value && any_isa<T>(*Value) && "Bad any cast!");
+ if (!Value || !any_isa<U>(*Value))
+ return nullptr;
+ return &static_cast<Any::StorageImpl<U> &>(*Value->Storage).Value;
+}
+
+template <class T> T *any_cast(Any *Value) {
+ using U = std::decay_t<T>;
+ assert(Value && any_isa<U>(*Value) && "Bad any cast!");
+ if (!Value || !any_isa<U>(*Value))
+ return nullptr;
+ return &static_cast<Any::StorageImpl<U> &>(*Value->Storage).Value;
+}
+
+} // end namespace llvm
+
+#endif // LLVM_ADT_ANY_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif