From ef5d0b5e97ec8e6fa395d377b09aa7755e345b4f Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:12:36 +0000
Subject: Vendor import of lldb trunk r321017:
 https://llvm.org/svn/llvm-project/lldb/trunk@321017

---
 source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp | 61 +++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp

(limited to 'source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp')

diff --git a/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp b/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp
new file mode 100644
index 000000000000..c4e0b66d4272
--- /dev/null
+++ b/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp
@@ -0,0 +1,61 @@
+//===-- LibCxxQueue.cpp -----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LibCxx.h"
+#include "lldb/DataFormatters/FormattersHelpers.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+namespace {
+
+class QueueFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+  QueueFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
+    Update();
+  }
+
+  size_t GetIndexOfChildWithName(const ConstString &name) override {
+    return m_container_sp ? m_container_sp->GetIndexOfChildWithName(name)
+                          : UINT32_MAX;
+  }
+
+  bool MightHaveChildren() override { return true; }
+  bool Update() override;
+
+  size_t CalculateNumChildren() override {
+    return m_container_sp ? m_container_sp->GetNumChildren() : 0;
+  }
+
+  ValueObjectSP GetChildAtIndex(size_t idx) override {
+    return m_container_sp ? m_container_sp->GetChildAtIndex(idx, true)
+                          : nullptr;
+  }
+
+private:
+  ValueObjectSP m_container_sp;
+};
+} // namespace
+
+bool QueueFrontEnd::Update() {
+  m_container_sp.reset();
+  ValueObjectSP c_sp = m_backend.GetChildMemberWithName(ConstString("c"), true);
+  if (!c_sp)
+    return false;
+  m_container_sp = c_sp->GetSyntheticValue();
+  return false;
+}
+
+SyntheticChildrenFrontEnd *
+formatters::LibcxxQueueFrontEndCreator(CXXSyntheticChildren *,
+                                       lldb::ValueObjectSP valobj_sp) {
+  if (valobj_sp)
+    return new QueueFrontEnd(*valobj_sp);
+  return nullptr;
+}
-- 
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