/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/tools/lld/include/lld/Core/Error.h
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1 | | //===- Error.h - system_error extensions for lld ----------------*- C++ -*-===// |
2 | | // |
3 | | // The LLVM Linker |
4 | | // |
5 | | // This file is distributed under the University of Illinois Open Source |
6 | | // License. See LICENSE.TXT for details. |
7 | | // |
8 | | //===----------------------------------------------------------------------===// |
9 | | // |
10 | | // This declares a new error_category for the lld library. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLD_CORE_ERROR_H |
15 | | #define LLD_CORE_ERROR_H |
16 | | |
17 | | #include "lld/Core/LLVM.h" |
18 | | #include "llvm/ADT/Twine.h" |
19 | | #include "llvm/Support/Error.h" |
20 | | #include <system_error> |
21 | | |
22 | | namespace lld { |
23 | | |
24 | | const std::error_category &YamlReaderCategory(); |
25 | | |
26 | | enum class YamlReaderError { |
27 | | unknown_keyword, |
28 | | illegal_value |
29 | | }; |
30 | | |
31 | 6 | inline std::error_code make_error_code(YamlReaderError e) { |
32 | 6 | return std::error_code(static_cast<int>(e), YamlReaderCategory()); |
33 | 6 | } |
34 | | |
35 | | /// Creates an error_code object that has associated with it an arbitrary |
36 | | /// error messsage. The value() of the error_code will always be non-zero |
37 | | /// but its value is meaningless. The messsage() will be (a copy of) the |
38 | | /// supplied error string. |
39 | | /// Note: Once ErrorOr<> is updated to work with errors other than error_code, |
40 | | /// this can be updated to return some other kind of error. |
41 | | std::error_code make_dynamic_error_code(StringRef msg); |
42 | | |
43 | | /// Generic error. |
44 | | /// |
45 | | /// For errors that don't require their own specific sub-error (most errors) |
46 | | /// this class can be used to describe the error via a string message. |
47 | | class GenericError : public llvm::ErrorInfo<GenericError> { |
48 | | public: |
49 | | static char ID; |
50 | | GenericError(Twine Msg); |
51 | 1 | const std::string &getMessage() const { return Msg; } |
52 | | void log(llvm::raw_ostream &OS) const override; |
53 | | |
54 | 0 | std::error_code convertToErrorCode() const override { |
55 | 0 | return make_dynamic_error_code(getMessage()); |
56 | 0 | } |
57 | | |
58 | | private: |
59 | | std::string Msg; |
60 | | }; |
61 | | |
62 | | } // end namespace lld |
63 | | |
64 | | namespace std { |
65 | | template <> struct is_error_code_enum<lld::YamlReaderError> : std::true_type {}; |
66 | | } |
67 | | |
68 | | #endif |