Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 83 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/ADT/Sequence.h b/clang-r353983/include/llvm/ADT/Sequence.h
new file mode 100644
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+++ b/clang-r353983/include/llvm/ADT/Sequence.h
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+//===- Sequence.h - Utility for producing sequences of values ---*- 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 routine provides some synthesis utilities to produce sequences of
+/// values. The names are intentionally kept very short as they tend to occur
+/// in common and widely used contexts.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ADT_SEQUENCE_H
+#define LLVM_ADT_SEQUENCE_H
+
+#include "llvm/ADT/iterator.h"
+#include "llvm/ADT/iterator_range.h"
+#include <algorithm>
+#include <iterator>
+#include <utility>
+
+namespace llvm {
+
+namespace detail {
+
+template <typename ValueT>
+class value_sequence_iterator
+    : public iterator_facade_base<value_sequence_iterator<ValueT>,
+                                  std::random_access_iterator_tag,
+                                  const ValueT> {
+  using BaseT = typename value_sequence_iterator::iterator_facade_base;
+
+  ValueT Value;
+
+public:
+  using difference_type = typename BaseT::difference_type;
+  using reference = typename BaseT::reference;
+
+  value_sequence_iterator() = default;
+  value_sequence_iterator(const value_sequence_iterator &) = default;
+  value_sequence_iterator(value_sequence_iterator &&Arg)
+      : Value(std::move(Arg.Value)) {}
+
+  template <typename U, typename Enabler = decltype(ValueT(std::declval<U>()))>
+  value_sequence_iterator(U &&Value) : Value(std::forward<U>(Value)) {}
+
+  value_sequence_iterator &operator+=(difference_type N) {
+    Value += N;
+    return *this;
+  }
+  value_sequence_iterator &operator-=(difference_type N) {
+    Value -= N;
+    return *this;
+  }
+  using BaseT::operator-;
+  difference_type operator-(const value_sequence_iterator &RHS) const {
+    return Value - RHS.Value;
+  }
+
+  bool operator==(const value_sequence_iterator &RHS) const {
+    return Value == RHS.Value;
+  }
+  bool operator<(const value_sequence_iterator &RHS) const {
+    return Value < RHS.Value;
+  }
+
+  reference operator*() const { return Value; }
+};
+
+} // end namespace detail
+
+template <typename ValueT>
+iterator_range<detail::value_sequence_iterator<ValueT>> seq(ValueT Begin,
+                                                            ValueT End) {
+  return make_range(detail::value_sequence_iterator<ValueT>(Begin),
+                    detail::value_sequence_iterator<ValueT>(End));
+}
+
+} // end namespace llvm
+
+#endif // LLVM_ADT_SEQUENCE_H