Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 54 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/TableGen/StringMatcher.h b/clang-r353983/include/llvm/TableGen/StringMatcher.h
new file mode 100644
index 00000000..795b7a6d
--- /dev/null
+++ b/clang-r353983/include/llvm/TableGen/StringMatcher.h
@@ -0,0 +1,54 @@
+//===- StringMatcher.h - Generate a matcher for input strings ---*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the StringMatcher class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TABLEGEN_STRINGMATCHER_H
+#define LLVM_TABLEGEN_STRINGMATCHER_H
+
+#include "llvm/ADT/StringRef.h"
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class raw_ostream;
+
+/// Given a list of strings and code to execute when they match, output a
+/// simple switch tree to classify the input string.
+///
+/// If a match is found, the code in Matches[i].second is executed; control must
+/// not exit this code fragment.  If nothing matches, execution falls through.
+class StringMatcher {
+public:
+  using StringPair = std::pair<std::string, std::string>;
+
+private:
+  StringRef StrVariableName;
+  const std::vector<StringPair> &Matches;
+  raw_ostream &OS;
+
+public:
+  StringMatcher(StringRef strVariableName,
+                const std::vector<StringPair> &matches, raw_ostream &os)
+    : StrVariableName(strVariableName), Matches(matches), OS(os) {}
+
+  void Emit(unsigned Indent = 0, bool IgnoreDuplicates = false) const;
+
+private:
+  bool EmitStringMatcherForChar(const std::vector<const StringPair *> &Matches,
+                                unsigned CharNo, unsigned IndentCount,
+                                bool IgnoreDuplicates) const;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_TABLEGEN_STRINGMATCHER_H