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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221763 91177308-0d34-0410-b5e6-96231b3b80d8
564 lines
20 KiB
C++
564 lines
20 KiB
C++
//===- llvm/ADT/STLExtras.h - Useful STL related functions ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains some templates that are useful if you are working with the
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// STL at all.
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//
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// No library is required when using these functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_STLEXTRAS_H
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#define LLVM_ADT_STLEXTRAS_H
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#include "llvm/Support/Compiler.h"
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#include <cstddef> // for std::size_t
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#include <cstdlib> // for qsort
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#include <functional>
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#include <iterator>
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#include <memory>
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#include <utility> // for std::pair
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// Extra additions to <functional>
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//===----------------------------------------------------------------------===//
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template<class Ty>
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struct identity : public std::unary_function<Ty, Ty> {
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Ty &operator()(Ty &self) const {
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return self;
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}
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const Ty &operator()(const Ty &self) const {
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return self;
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}
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};
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template<class Ty>
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struct less_ptr : public std::binary_function<Ty, Ty, bool> {
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bool operator()(const Ty* left, const Ty* right) const {
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return *left < *right;
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}
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};
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template<class Ty>
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struct greater_ptr : public std::binary_function<Ty, Ty, bool> {
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bool operator()(const Ty* left, const Ty* right) const {
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return *right < *left;
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}
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};
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/// An efficient, type-erasing, non-owning reference to a callable. This is
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/// intended for use as the type of a function parameter that is not used
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/// after the function in question returns.
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///
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/// This class does not own the callable, so it is not in general safe to store
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/// a function_ref.
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template<typename Fn> class function_ref;
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#if LLVM_HAS_VARIADIC_TEMPLATES
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template<typename Ret, typename ...Params>
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class function_ref<Ret(Params...)> {
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Ret (*callback)(intptr_t callable, Params ...params);
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intptr_t callable;
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template<typename Callable>
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static Ret callback_fn(intptr_t callable, Params ...params) {
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return (*reinterpret_cast<Callable*>(callable))(
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std::forward<Params>(params)...);
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}
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public:
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template <typename Callable>
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function_ref(Callable &&callable,
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typename std::enable_if<
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!std::is_same<typename std::remove_reference<Callable>::type,
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function_ref>::value>::type * = nullptr)
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: callback(callback_fn<typename std::remove_reference<Callable>::type>),
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callable(reinterpret_cast<intptr_t>(&callable)) {}
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Ret operator()(Params ...params) const {
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return callback(callable, std::forward<Params>(params)...);
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}
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};
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#else
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template<typename Ret>
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class function_ref<Ret()> {
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Ret (*callback)(intptr_t callable);
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intptr_t callable;
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template<typename Callable>
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static Ret callback_fn(intptr_t callable) {
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return (*reinterpret_cast<Callable*>(callable))();
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}
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public:
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template<typename Callable>
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function_ref(Callable &&callable,
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typename std::enable_if<
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!std::is_same<typename std::remove_reference<Callable>::type,
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function_ref>::value>::type * = nullptr)
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: callback(callback_fn<typename std::remove_reference<Callable>::type>),
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callable(reinterpret_cast<intptr_t>(&callable)) {}
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Ret operator()() const { return callback(callable); }
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};
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template<typename Ret, typename Param1>
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class function_ref<Ret(Param1)> {
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Ret (*callback)(intptr_t callable, Param1 param1);
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intptr_t callable;
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template<typename Callable>
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static Ret callback_fn(intptr_t callable, Param1 param1) {
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return (*reinterpret_cast<Callable*>(callable))(
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std::forward<Param1>(param1));
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}
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public:
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template<typename Callable>
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function_ref(Callable &&callable,
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typename std::enable_if<
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!std::is_same<typename std::remove_reference<Callable>::type,
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function_ref>::value>::type * = nullptr)
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: callback(callback_fn<typename std::remove_reference<Callable>::type>),
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callable(reinterpret_cast<intptr_t>(&callable)) {}
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Ret operator()(Param1 param1) {
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return callback(callable, std::forward<Param1>(param1));
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}
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};
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template<typename Ret, typename Param1, typename Param2>
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class function_ref<Ret(Param1, Param2)> {
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Ret (*callback)(intptr_t callable, Param1 param1, Param2 param2);
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intptr_t callable;
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template<typename Callable>
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static Ret callback_fn(intptr_t callable, Param1 param1, Param2 param2) {
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return (*reinterpret_cast<Callable*>(callable))(
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std::forward<Param1>(param1),
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std::forward<Param2>(param2));
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}
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public:
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template<typename Callable>
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function_ref(Callable &&callable,
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typename std::enable_if<
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!std::is_same<typename std::remove_reference<Callable>::type,
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function_ref>::value>::type * = nullptr)
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: callback(callback_fn<typename std::remove_reference<Callable>::type>),
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callable(reinterpret_cast<intptr_t>(&callable)) {}
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Ret operator()(Param1 param1, Param2 param2) {
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return callback(callable,
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std::forward<Param1>(param1),
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std::forward<Param2>(param2));
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}
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};
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template<typename Ret, typename Param1, typename Param2, typename Param3>
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class function_ref<Ret(Param1, Param2, Param3)> {
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Ret (*callback)(intptr_t callable, Param1 param1, Param2 param2, Param3 param3);
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intptr_t callable;
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template<typename Callable>
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static Ret callback_fn(intptr_t callable, Param1 param1, Param2 param2,
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Param3 param3) {
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return (*reinterpret_cast<Callable*>(callable))(
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std::forward<Param1>(param1),
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std::forward<Param2>(param2),
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std::forward<Param3>(param3));
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}
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public:
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template<typename Callable>
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function_ref(Callable &&callable,
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typename std::enable_if<
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!std::is_same<typename std::remove_reference<Callable>::type,
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function_ref>::value>::type * = nullptr)
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: callback(callback_fn<typename std::remove_reference<Callable>::type>),
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callable(reinterpret_cast<intptr_t>(&callable)) {}
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Ret operator()(Param1 param1, Param2 param2, Param3 param3) {
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return callback(callable,
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std::forward<Param1>(param1),
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std::forward<Param2>(param2),
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std::forward<Param3>(param3));
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}
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};
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#endif
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// deleter - Very very very simple method that is used to invoke operator
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// delete on something. It is used like this:
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//
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// for_each(V.begin(), B.end(), deleter<Interval>);
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//
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template <class T>
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inline void deleter(T *Ptr) {
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delete Ptr;
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}
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//===----------------------------------------------------------------------===//
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// Extra additions to <iterator>
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//===----------------------------------------------------------------------===//
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// mapped_iterator - This is a simple iterator adapter that causes a function to
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// be dereferenced whenever operator* is invoked on the iterator.
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//
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template <class RootIt, class UnaryFunc>
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class mapped_iterator {
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RootIt current;
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UnaryFunc Fn;
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public:
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typedef typename std::iterator_traits<RootIt>::iterator_category
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iterator_category;
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typedef typename std::iterator_traits<RootIt>::difference_type
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difference_type;
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typedef typename UnaryFunc::result_type value_type;
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typedef void pointer;
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//typedef typename UnaryFunc::result_type *pointer;
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typedef void reference; // Can't modify value returned by fn
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typedef RootIt iterator_type;
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typedef mapped_iterator<RootIt, UnaryFunc> _Self;
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inline const RootIt &getCurrent() const { return current; }
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inline const UnaryFunc &getFunc() const { return Fn; }
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inline explicit mapped_iterator(const RootIt &I, UnaryFunc F)
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: current(I), Fn(F) {}
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inline value_type operator*() const { // All this work to do this
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return Fn(*current); // little change
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}
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_Self& operator++() { ++current; return *this; }
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_Self& operator--() { --current; return *this; }
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_Self operator++(int) { _Self __tmp = *this; ++current; return __tmp; }
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_Self operator--(int) { _Self __tmp = *this; --current; return __tmp; }
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_Self operator+ (difference_type n) const {
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return _Self(current + n, Fn);
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}
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_Self& operator+= (difference_type n) { current += n; return *this; }
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_Self operator- (difference_type n) const {
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return _Self(current - n, Fn);
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}
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_Self& operator-= (difference_type n) { current -= n; return *this; }
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reference operator[](difference_type n) const { return *(*this + n); }
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inline bool operator!=(const _Self &X) const { return !operator==(X); }
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inline bool operator==(const _Self &X) const { return current == X.current; }
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inline bool operator< (const _Self &X) const { return current < X.current; }
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inline difference_type operator-(const _Self &X) const {
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return current - X.current;
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}
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};
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template <class _Iterator, class Func>
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inline mapped_iterator<_Iterator, Func>
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operator+(typename mapped_iterator<_Iterator, Func>::difference_type N,
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const mapped_iterator<_Iterator, Func>& X) {
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return mapped_iterator<_Iterator, Func>(X.getCurrent() - N, X.getFunc());
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}
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// map_iterator - Provide a convenient way to create mapped_iterators, just like
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// make_pair is useful for creating pairs...
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//
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template <class ItTy, class FuncTy>
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inline mapped_iterator<ItTy, FuncTy> map_iterator(const ItTy &I, FuncTy F) {
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return mapped_iterator<ItTy, FuncTy>(I, F);
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}
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//===----------------------------------------------------------------------===//
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// Extra additions to <utility>
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//===----------------------------------------------------------------------===//
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/// \brief Function object to check whether the first component of a std::pair
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/// compares less than the first component of another std::pair.
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struct less_first {
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template <typename T> bool operator()(const T &lhs, const T &rhs) const {
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return lhs.first < rhs.first;
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}
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};
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/// \brief Function object to check whether the second component of a std::pair
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/// compares less than the second component of another std::pair.
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struct less_second {
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template <typename T> bool operator()(const T &lhs, const T &rhs) const {
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return lhs.second < rhs.second;
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}
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};
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//===----------------------------------------------------------------------===//
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// Extra additions for arrays
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//===----------------------------------------------------------------------===//
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/// Find the length of an array.
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template <class T, std::size_t N>
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LLVM_CONSTEXPR inline size_t array_lengthof(T (&)[N]) {
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return N;
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}
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/// Adapt std::less<T> for array_pod_sort.
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template<typename T>
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inline int array_pod_sort_comparator(const void *P1, const void *P2) {
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if (std::less<T>()(*reinterpret_cast<const T*>(P1),
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*reinterpret_cast<const T*>(P2)))
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return -1;
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if (std::less<T>()(*reinterpret_cast<const T*>(P2),
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*reinterpret_cast<const T*>(P1)))
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return 1;
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return 0;
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}
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/// get_array_pod_sort_comparator - This is an internal helper function used to
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/// get type deduction of T right.
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template<typename T>
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inline int (*get_array_pod_sort_comparator(const T &))
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(const void*, const void*) {
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return array_pod_sort_comparator<T>;
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}
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/// array_pod_sort - This sorts an array with the specified start and end
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/// extent. This is just like std::sort, except that it calls qsort instead of
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/// using an inlined template. qsort is slightly slower than std::sort, but
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/// most sorts are not performance critical in LLVM and std::sort has to be
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/// template instantiated for each type, leading to significant measured code
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/// bloat. This function should generally be used instead of std::sort where
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/// possible.
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///
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/// This function assumes that you have simple POD-like types that can be
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/// compared with std::less and can be moved with memcpy. If this isn't true,
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/// you should use std::sort.
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///
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/// NOTE: If qsort_r were portable, we could allow a custom comparator and
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/// default to std::less.
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template<class IteratorTy>
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inline void array_pod_sort(IteratorTy Start, IteratorTy End) {
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// Don't dereference start iterator of empty sequence.
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if (Start == End) return;
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qsort(&*Start, End-Start, sizeof(*Start),
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get_array_pod_sort_comparator(*Start));
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}
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template <class IteratorTy>
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inline void array_pod_sort(
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IteratorTy Start, IteratorTy End,
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int (*Compare)(
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const typename std::iterator_traits<IteratorTy>::value_type *,
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const typename std::iterator_traits<IteratorTy>::value_type *)) {
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// Don't dereference start iterator of empty sequence.
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if (Start == End) return;
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qsort(&*Start, End - Start, sizeof(*Start),
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reinterpret_cast<int (*)(const void *, const void *)>(Compare));
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}
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//===----------------------------------------------------------------------===//
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// Extra additions to <algorithm>
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//===----------------------------------------------------------------------===//
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/// For a container of pointers, deletes the pointers and then clears the
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/// container.
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template<typename Container>
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void DeleteContainerPointers(Container &C) {
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for (typename Container::iterator I = C.begin(), E = C.end(); I != E; ++I)
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delete *I;
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C.clear();
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}
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/// In a container of pairs (usually a map) whose second element is a pointer,
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/// deletes the second elements and then clears the container.
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template<typename Container>
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void DeleteContainerSeconds(Container &C) {
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for (typename Container::iterator I = C.begin(), E = C.end(); I != E; ++I)
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delete I->second;
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C.clear();
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}
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//===----------------------------------------------------------------------===//
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// Extra additions to <memory>
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//===----------------------------------------------------------------------===//
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#if LLVM_HAS_VARIADIC_TEMPLATES
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// Implement make_unique according to N3656.
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/// \brief Constructs a `new T()` with the given args and returns a
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/// `unique_ptr<T>` which owns the object.
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///
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/// Example:
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///
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/// auto p = make_unique<int>();
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/// auto p = make_unique<std::tuple<int, int>>(0, 1);
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template <class T, class... Args>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Args &&... args) {
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return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
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}
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/// \brief Constructs a `new T[n]` with the given args and returns a
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/// `unique_ptr<T[]>` which owns the object.
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///
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/// \param n size of the new array.
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///
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/// Example:
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///
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/// auto p = make_unique<int[]>(2); // value-initializes the array with 0's.
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template <class T>
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typename std::enable_if<std::is_array<T>::value && std::extent<T>::value == 0,
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std::unique_ptr<T>>::type
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make_unique(size_t n) {
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return std::unique_ptr<T>(new typename std::remove_extent<T>::type[n]());
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}
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/// This function isn't used and is only here to provide better compile errors.
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template <class T, class... Args>
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typename std::enable_if<std::extent<T>::value != 0>::type
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make_unique(Args &&...) LLVM_DELETED_FUNCTION;
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#else
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template <class T>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique() {
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return std::unique_ptr<T>(new T());
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}
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template <class T, class Arg1>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Arg1 &&arg1) {
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return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1)));
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}
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template <class T, class Arg1, class Arg2>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Arg1 &&arg1, Arg2 &&arg2) {
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return std::unique_ptr<T>(
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new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2)));
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}
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template <class T, class Arg1, class Arg2, class Arg3>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3) {
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return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1),
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std::forward<Arg2>(arg2),
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std::forward<Arg3>(arg3)));
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}
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template <class T, class Arg1, class Arg2, class Arg3, class Arg4>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4) {
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return std::unique_ptr<T>(
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new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
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std::forward<Arg3>(arg3), std::forward<Arg4>(arg4)));
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}
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template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
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make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5) {
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return std::unique_ptr<T>(
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new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
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std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
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std::forward<Arg5>(arg5)));
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}
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template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5,
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class Arg6>
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typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
|
|
make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5,
|
|
Arg6 &&arg6) {
|
|
return std::unique_ptr<T>(
|
|
new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
|
|
std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
|
|
std::forward<Arg5>(arg5), std::forward<Arg6>(arg6)));
|
|
}
|
|
|
|
template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5,
|
|
class Arg6, class Arg7>
|
|
typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
|
|
make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5,
|
|
Arg6 &&arg6, Arg7 &&arg7) {
|
|
return std::unique_ptr<T>(
|
|
new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
|
|
std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
|
|
std::forward<Arg5>(arg5), std::forward<Arg6>(arg6),
|
|
std::forward<Arg7>(arg7)));
|
|
}
|
|
|
|
template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5,
|
|
class Arg6, class Arg7, class Arg8>
|
|
typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
|
|
make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5,
|
|
Arg6 &&arg6, Arg7 &&arg7, Arg8 &&arg8) {
|
|
return std::unique_ptr<T>(
|
|
new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
|
|
std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
|
|
std::forward<Arg5>(arg5), std::forward<Arg6>(arg6),
|
|
std::forward<Arg7>(arg7), std::forward<Arg8>(arg8)));
|
|
}
|
|
|
|
template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5,
|
|
class Arg6, class Arg7, class Arg8, class Arg9>
|
|
typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
|
|
make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5,
|
|
Arg6 &&arg6, Arg7 &&arg7, Arg8 &&arg8, Arg9 &&arg9) {
|
|
return std::unique_ptr<T>(
|
|
new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
|
|
std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
|
|
std::forward<Arg5>(arg5), std::forward<Arg6>(arg6),
|
|
std::forward<Arg7>(arg7), std::forward<Arg8>(arg8),
|
|
std::forward<Arg9>(arg9)));
|
|
}
|
|
|
|
template <class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5,
|
|
class Arg6, class Arg7, class Arg8, class Arg9, class Arg10>
|
|
typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
|
|
make_unique(Arg1 &&arg1, Arg2 &&arg2, Arg3 &&arg3, Arg4 &&arg4, Arg5 &&arg5,
|
|
Arg6 &&arg6, Arg7 &&arg7, Arg8 &&arg8, Arg9 &&arg9, Arg10 &&arg10) {
|
|
return std::unique_ptr<T>(
|
|
new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2),
|
|
std::forward<Arg3>(arg3), std::forward<Arg4>(arg4),
|
|
std::forward<Arg5>(arg5), std::forward<Arg6>(arg6),
|
|
std::forward<Arg7>(arg7), std::forward<Arg8>(arg8),
|
|
std::forward<Arg9>(arg9), std::forward<Arg10>(arg10)));
|
|
}
|
|
|
|
template <class T>
|
|
typename std::enable_if<std::is_array<T>::value &&std::extent<T>::value == 0,
|
|
std::unique_ptr<T>>::type
|
|
make_unique(size_t n) {
|
|
return std::unique_ptr<T>(new typename std::remove_extent<T>::type[n]());
|
|
}
|
|
|
|
#endif
|
|
|
|
struct FreeDeleter {
|
|
void operator()(void* v) {
|
|
::free(v);
|
|
}
|
|
};
|
|
|
|
template<typename First, typename Second>
|
|
struct pair_hash {
|
|
size_t operator()(const std::pair<First, Second> &P) const {
|
|
return std::hash<First>()(P.first) * 31 + std::hash<Second>()(P.second);
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|