Coroutines.h

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//===-- Coroutines.h --------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLDB_SOURCE_PLUGINS_LANGUAGE_CPLUSPLUS_COROUTINES_H
#define LLDB_SOURCE_PLUGINS_LANGUAGE_CPLUSPLUS_COROUTINES_H
 
#include "lldb/Core/ValueObject.h"
#include "lldb/DataFormatters/TypeSummary.h"
#include "lldb/DataFormatters/TypeSynthetic.h"
#include "lldb/Utility/Stream.h"
 
namespace lldb_private {
 
namespace formatters {
 
/// Summary provider for `std::coroutine_handle<T>` from  libc++, libstdc++ and
/// MSVC STL.
bool StdlibCoroutineHandleSummaryProvider(ValueObject &valobj, Stream &stream,
                                          const TypeSummaryOptions &options);
 
/// Synthetic children frontend for `std::coroutine_handle<promise_type>` from
/// libc++, libstdc++ and MSVC STL. Shows the compiler-generated `resume` and
/// `destroy` function pointers as well as the `promise`, if the promise type
/// is `promise_type != void`.
class StdlibCoroutineHandleSyntheticFrontEnd
    : public SyntheticChildrenFrontEnd {
public:
  StdlibCoroutineHandleSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
 
  ~StdlibCoroutineHandleSyntheticFrontEnd() override;
 
  llvm::Expected<uint32_t> CalculateNumChildren() override;
 
  lldb::ValueObjectSP GetChildAtIndex(uint32_t idx) override;
 
  lldb::ChildCacheState Update() override;
 
  bool MightHaveChildren() override;
 
  size_t GetIndexOfChildWithName(ConstString name) override;
 
private:
  lldb::ValueObjectSP m_resume_ptr_sp;
  lldb::ValueObjectSP m_destroy_ptr_sp;
  lldb::ValueObjectSP m_promise_ptr_sp;
};
 
SyntheticChildrenFrontEnd *
StdlibCoroutineHandleSyntheticFrontEndCreator(CXXSyntheticChildren *,
                                              lldb::ValueObjectSP);
 
} // namespace formatters
} // namespace lldb_private
 
#endif // LLDB_SOURCE_PLUGINS_LANGUAGE_CPLUSPLUS_COROUTINES_H