[TextAPI] Add functionality to manipulate over InterfaceFiles

InterfaceFile is the in-memory representation for tbd files. Add APIs to
merge, extract, remove, and inline reexported libraries.

Reviewed By: zixuw

Differential Revision: https://reviews.llvm.org/D153398

1 files changed, 33 insertions, 0 deletions

diff --git a/llvm/lib/TextAPI/TextAPIError.cpp b/llvm/lib/TextAPI/TextAPIError.cpp
new file mode 100644
index 000000000000..07eae7ab4100
--- /dev/null
+++ b/llvm/lib/TextAPI/TextAPIError.cpp
@@ -0,0 +1,33 @@
+//===- TextAPIError.cpp - Tapi Error ----------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Implements TAPI Error.
+///
+//===----------------------------------------------------------------------===//
+
+#include "llvm/TextAPI/TextAPIError.h"
+
+using namespace llvm;
+using namespace llvm::MachO;
+
+char TextAPIError::ID = 0;
+
+void TextAPIError::log(raw_ostream &OS) const {
+  switch (EC) {
+  case TextAPIErrorCode::NoSuchArchitecture:
+    OS << "no such architecture\n";
+    return;
+  default:
+    llvm_unreachable("unhandled TextAPIErrorCode");
+  }
+}
+
+std::error_code TextAPIError::convertToErrorCode() const {
+  llvm_unreachable("convertToErrorCode is not supported.");
+}