mirror of
https://github.com/wpilibsuite/allwpilib
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139 lines
3.7 KiB
C++
139 lines
3.7 KiB
C++
//===----- lib/Support/Error.cpp - Error and associated utilities ---------===//
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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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#include "wpi/Error.h"
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#include "wpi/Twine.h"
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#include "wpi/ErrorHandling.h"
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#include "wpi/ManagedStatic.h"
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#include <system_error>
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using namespace wpi;
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namespace {
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enum class ErrorErrorCode : int {
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MultipleErrors = 1,
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FileError,
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InconvertibleError
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};
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// FIXME: This class is only here to support the transition to wpi::Error. It
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// will be removed once this transition is complete. Clients should prefer to
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// deal with the Error value directly, rather than converting to error_code.
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class ErrorErrorCategory : public std::error_category {
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public:
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const char *name() const noexcept override { return "Error"; }
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std::string message(int condition) const override {
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switch (static_cast<ErrorErrorCode>(condition)) {
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case ErrorErrorCode::MultipleErrors:
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return "Multiple errors";
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case ErrorErrorCode::InconvertibleError:
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return "Inconvertible error value. An error has occurred that could "
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"not be converted to a known std::error_code. Please file a "
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"bug.";
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case ErrorErrorCode::FileError:
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return "A file error occurred.";
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}
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wpi_unreachable("Unhandled error code");
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}
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};
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}
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static ManagedStatic<ErrorErrorCategory> ErrorErrorCat;
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namespace wpi {
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void ErrorInfoBase::anchor() {}
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char ErrorInfoBase::ID = 0;
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char ErrorList::ID = 0;
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void ECError::anchor() {}
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char ECError::ID = 0;
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char StringError::ID = 0;
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char FileError::ID = 0;
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void logAllUnhandledErrors(Error E, raw_ostream &OS, Twine ErrorBanner) {
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if (!E)
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return;
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OS << ErrorBanner;
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handleAllErrors(std::move(E), [&](const ErrorInfoBase &EI) {
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EI.log(OS);
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OS << "\n";
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});
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}
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std::error_code ErrorList::convertToErrorCode() const {
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return std::error_code(static_cast<int>(ErrorErrorCode::MultipleErrors),
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*ErrorErrorCat);
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}
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std::error_code inconvertibleErrorCode() {
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return std::error_code(static_cast<int>(ErrorErrorCode::InconvertibleError),
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*ErrorErrorCat);
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}
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std::error_code FileError::convertToErrorCode() const {
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return std::error_code(static_cast<int>(ErrorErrorCode::FileError),
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*ErrorErrorCat);
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}
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Error errorCodeToError(std::error_code EC) {
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if (!EC)
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return Error::success();
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return Error(wpi::make_unique<ECError>(ECError(EC)));
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}
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std::error_code errorToErrorCode(Error Err) {
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std::error_code EC;
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handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) {
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EC = EI.convertToErrorCode();
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});
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if (EC == inconvertibleErrorCode())
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report_fatal_error(EC.message());
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return EC;
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}
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StringError::StringError(std::error_code EC, const Twine &S)
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: Msg(S.str()), EC(EC) {}
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StringError::StringError(const Twine &S, std::error_code EC)
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: Msg(S.str()), EC(EC), PrintMsgOnly(true) {}
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void StringError::log(raw_ostream &OS) const {
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if (PrintMsgOnly) {
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OS << Msg;
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} else {
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OS << EC.message();
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if (!Msg.empty())
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OS << (" " + Msg);
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}
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}
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std::error_code StringError::convertToErrorCode() const {
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return EC;
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}
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Error createStringError(std::error_code EC, char const *Msg) {
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return make_error<StringError>(Msg, EC);
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}
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void report_fatal_error(Error Err, bool GenCrashDiag) {
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assert(Err && "report_fatal_error called with success value");
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std::string ErrMsg;
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{
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raw_string_ostream ErrStream(ErrMsg);
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logAllUnhandledErrors(std::move(Err), ErrStream);
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}
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report_fatal_error(ErrMsg);
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}
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} // end namespace wpi
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