Add data formatter for libc++ std::queue
Summary:
std::queue is just a fancy wrapper around another container, so all we
need to do is to delegate to the it.
Reviewers: jingham, EricWF
Subscribers: srhines, mgorny, lldb-commits, eugene
Differential Revision: https://reviews.llvm.org/D35666
llvm-svn: 317099
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp
new file mode 100644
index 0000000..c4e0b66
--- /dev/null
+++ b/lldb/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;
+}