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94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
//===- Error.h - system_error extensions for Object -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This declares a new error_category for the Object library.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_ERROR_H
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#define LLVM_OBJECT_ERROR_H
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Error.h"
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#include <system_error>
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namespace llvm {
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namespace object {
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class Binary;
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const std::error_category &object_category();
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enum class object_error {
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// Error code 0 is absent. Use std::error_code() instead.
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arch_not_found = 1,
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invalid_file_type,
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parse_failed,
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unexpected_eof,
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string_table_non_null_end,
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invalid_section_index,
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bitcode_section_not_found,
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invalid_symbol_index,
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};
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inline std::error_code make_error_code(object_error e) {
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return std::error_code(static_cast<int>(e), object_category());
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}
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/// Base class for all errors indicating malformed binary files.
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///
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/// Having a subclass for all malformed binary files allows archive-walking
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/// code to skip malformed files without having to understand every possible
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/// way that a binary file might be malformed.
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///
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/// Currently inherits from ECError for easy interoperability with
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/// std::error_code, but this will be removed in the future.
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class BinaryError : public ErrorInfo<BinaryError, ECError> {
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virtual void anchor();
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public:
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static char ID;
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BinaryError() {
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// Default to parse_failed, can be overridden with setErrorCode.
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setErrorCode(make_error_code(object_error::parse_failed));
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}
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};
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/// Generic binary error.
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///
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/// For errors that don't require their own specific sub-error (most errors)
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/// this class can be used to describe the error via a string message.
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class GenericBinaryError : public ErrorInfo<GenericBinaryError, BinaryError> {
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public:
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static char ID;
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GenericBinaryError(Twine Msg);
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GenericBinaryError(Twine Msg, object_error ECOverride);
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const std::string &getMessage() const { return Msg; }
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void log(raw_ostream &OS) const override;
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private:
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std::string Msg;
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};
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/// isNotObjectErrorInvalidFileType() is used when looping through the children
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/// of an archive after calling getAsBinary() on the child and it returns an
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/// llvm::Error. In the cases we want to loop through the children and ignore the
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/// non-objects in the archive this is used to test the error to see if an
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/// error() function needs to called on the llvm::Error.
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Error isNotObjectErrorInvalidFileType(llvm::Error Err);
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} // end namespace object.
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} // end namespace llvm.
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namespace std {
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template <>
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struct is_error_code_enum<llvm::object::object_error> : std::true_type {};
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}
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#endif
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