1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/Error.cpp b/contrib/llvm/lib/Support/Error.cpp
new file mode 100644
index 0000000..6b22691
--- /dev/null
+++ b/contrib/llvm/lib/Support/Error.cpp
@@ -0,0 +1,113 @@
+//===----- lib/Support/Error.cpp - Error and associated utilities ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Error.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+
+using namespace llvm;
+
+namespace {
+
+  enum class ErrorErrorCode : int {
+    MultipleErrors = 1,
+    InconvertibleError
+  };
+
+  // FIXME: This class is only here to support the transition to llvm::Error. It
+  // will be removed once this transition is complete. Clients should prefer to
+  // deal with the Error value directly, rather than converting to error_code.
+  class ErrorErrorCategory : public std::error_category {
+  public:
+    const char *name() const LLVM_NOEXCEPT override { return "Error"; }
+
+    std::string message(int condition) const override {
+      switch (static_cast<ErrorErrorCode>(condition)) {
+      case ErrorErrorCode::MultipleErrors:
+        return "Multiple errors";
+      case ErrorErrorCode::InconvertibleError:
+        return "Inconvertible error value. An error has occurred that could "
+               "not be converted to a known std::error_code. Please file a "
+               "bug.";
+      }
+      llvm_unreachable("Unhandled error code");
+    }
+  };
+
+}
+
+static ManagedStatic<ErrorErrorCategory> ErrorErrorCat;
+
+namespace llvm {
+
+void ErrorInfoBase::anchor() {}
+char ErrorInfoBase::ID = 0;
+char ErrorList::ID = 0;
+char ECError::ID = 0;
+char StringError::ID = 0;
+
+void logAllUnhandledErrors(Error E, raw_ostream &OS, Twine ErrorBanner) {
+  if (!E)
+    return;
+  OS << ErrorBanner;
+  handleAllErrors(std::move(E), [&](const ErrorInfoBase &EI) {
+    EI.log(OS);
+    OS << "\n";
+  });
+}
+
+
+std::error_code ErrorList::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(ErrorErrorCode::MultipleErrors),
+                         *ErrorErrorCat);
+}
+
+std::error_code inconvertibleErrorCode() {
+  return std::error_code(static_cast<int>(ErrorErrorCode::InconvertibleError),
+                         *ErrorErrorCat);
+}
+
+Error errorCodeToError(std::error_code EC) {
+  if (!EC)
+    return Error::success();
+  return Error(llvm::make_unique<ECError>(ECError(EC)));
+}
+
+std::error_code errorToErrorCode(Error Err) {
+  std::error_code EC;
+  handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) {
+    EC = EI.convertToErrorCode();
+  });
+  if (EC == inconvertibleErrorCode())
+    report_fatal_error(EC.message());
+  return EC;
+}
+
+StringError::StringError(const Twine &S, std::error_code EC)
+    : Msg(S.str()), EC(EC) {}
+
+void StringError::log(raw_ostream &OS) const { OS << Msg; }
+
+std::error_code StringError::convertToErrorCode() const {
+  return EC;
+}
+
+void report_fatal_error(Error Err, bool GenCrashDiag) {
+  assert(Err && "report_fatal_error called with success value");
+  std::string ErrMsg;
+  {
+    raw_string_ostream ErrStream(ErrMsg);
+    logAllUnhandledErrors(std::move(Err), ErrStream, "");
+  }
+  report_fatal_error(ErrMsg);
+}
+
+}