Error.h

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// Copyright 2023 SandboxAQ
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
 
#pragma once
 
#include "Bartleby/Bartleby.h"
 
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Error.h"
 
#include <variant>
 
namespace saq::bartleby {
 
class Error : public llvm::ErrorInfo<Error> {
public:
  static char ID;
 
  struct UnsupportedBinaryReason {
    llvm::SmallString<32> Msg;
  };
 
  struct ObjectFormatTypeMismatchReason {
    ObjectFormat Constraint;
 
    ObjectFormat Found;
  };
 
  struct MachOUniversalBinaryReason {
    llvm::SmallString<32> Msg;
  };
 
  using ReasonT =
      std::variant<UnsupportedBinaryReason, ObjectFormatTypeMismatchReason,
                   MachOUniversalBinaryReason>;
 
  template <typename T> Error(T Reason) noexcept : Reason(std::move(Reason)) {}
 
  ~Error() noexcept override = default;
 
  void log(llvm::raw_ostream &OS) const noexcept override;
  std::string message() const noexcept override;
  std::error_code convertToErrorCode() const noexcept override;
 
private:
  ReasonT Reason;
};
 
} // end namespace saq::bartleby