| //===- Error.h - system_error extensions for lld ----------------*- C++ -*-===// |
| // |
| // The LLVM Linker |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This declares a new error_category for the lld library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLD_CORE_ERROR_H |
| #define LLD_CORE_ERROR_H |
| |
| #include "lld/Common/LLVM.h" |
| #include "llvm/ADT/Twine.h" |
| #include "llvm/Support/Error.h" |
| #include <system_error> |
| |
| namespace lld { |
| |
| const std::error_category &YamlReaderCategory(); |
| |
| enum class YamlReaderError { |
| unknown_keyword, |
| illegal_value |
| }; |
| |
| inline std::error_code make_error_code(YamlReaderError e) { |
| return std::error_code(static_cast<int>(e), YamlReaderCategory()); |
| } |
| |
| /// Creates an error_code object that has associated with it an arbitrary |
| /// error messsage. The value() of the error_code will always be non-zero |
| /// but its value is meaningless. The messsage() will be (a copy of) the |
| /// supplied error string. |
| /// Note: Once ErrorOr<> is updated to work with errors other than error_code, |
| /// this can be updated to return some other kind of error. |
| std::error_code make_dynamic_error_code(StringRef msg); |
| |
| /// Generic error. |
| /// |
| /// For errors that don't require their own specific sub-error (most errors) |
| /// this class can be used to describe the error via a string message. |
| class GenericError : public llvm::ErrorInfo<GenericError> { |
| public: |
| static char ID; |
| GenericError(Twine Msg); |
| const std::string &getMessage() const { return Msg; } |
| void log(llvm::raw_ostream &OS) const override; |
| |
| std::error_code convertToErrorCode() const override { |
| return make_dynamic_error_code(getMessage()); |
| } |
| |
| private: |
| std::string Msg; |
| }; |
| |
| } // end namespace lld |
| |
| namespace std { |
| template <> struct is_error_code_enum<lld::YamlReaderError> : std::true_type {}; |
| } |
| |
| #endif |