1 files changed, 84 insertions, 0 deletions
diff --git a/include/llvm/Support/DiagnosticPrinter.h b/include/llvm/Support/DiagnosticPrinter.h
new file mode 100644
index 0000000000..721b1b4212
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+++ b/include/llvm/Support/DiagnosticPrinter.h
@@ -0,0 +1,84 @@
+//===- llvm/Support/DiagnosticPrinter.h - Diagnostic Printer ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the main interface for printer backend diagnostic.
+//
+// Clients of the backend diagnostics should overload this interface based
+// on their needs.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_DIAGNOSTICPRINTER_H
+#define LLVM_SUPPORT_DIAGNOSTICPRINTER_H
+
+#include <string>
+
+namespace llvm {
+// Forward declarations.
+class raw_ostream;
+class StringRef;
+class Twine;
+class Value;
+
+/// \brief Interface for custom diagnostic printing.
+class DiagnosticPrinter {
+public:
+  virtual ~DiagnosticPrinter() {}
+
+  // Simple types.
+  virtual DiagnosticPrinter &operator<<(char C) = 0;
+  virtual DiagnosticPrinter &operator<<(unsigned char C) = 0;
+  virtual DiagnosticPrinter &operator<<(signed char C) = 0;
+  virtual DiagnosticPrinter &operator<<(StringRef Str) = 0;
+  virtual DiagnosticPrinter &operator<<(const char *Str) = 0;
+  virtual DiagnosticPrinter &operator<<(const std::string &Str) = 0;
+  virtual DiagnosticPrinter &operator<<(unsigned long N) = 0;
+  virtual DiagnosticPrinter &operator<<(long N) = 0;
+  virtual DiagnosticPrinter &operator<<(unsigned long long N) = 0;
+  virtual DiagnosticPrinter &operator<<(long long N) = 0;
+  virtual DiagnosticPrinter &operator<<(const void *P) = 0;
+  virtual DiagnosticPrinter &operator<<(unsigned int N) = 0;
+  virtual DiagnosticPrinter &operator<<(int N) = 0;
+  virtual DiagnosticPrinter &operator<<(double N) = 0;
+  virtual DiagnosticPrinter &operator<<(const Twine &Str) = 0;
+
+  // IR related types.
+  virtual DiagnosticPrinter &operator<<(const Value &V) = 0;
+};
+
+/// \brief Basic diagnostic printer that uses an underlying raw_ostream.
+class DiagnosticPrinterRawOStream : public DiagnosticPrinter {
+protected:
+  raw_ostream &Stream;
+
+public:
+  DiagnosticPrinterRawOStream(raw_ostream &Stream) : Stream(Stream) {};
+
+  // Simple types.
+  virtual DiagnosticPrinter &operator<<(char C);
+  virtual DiagnosticPrinter &operator<<(unsigned char C);
+  virtual DiagnosticPrinter &operator<<(signed char C);
+  virtual DiagnosticPrinter &operator<<(StringRef Str);
+  virtual DiagnosticPrinter &operator<<(const char *Str);
+  virtual DiagnosticPrinter &operator<<(const std::string &Str);
+  virtual DiagnosticPrinter &operator<<(unsigned long N);
+  virtual DiagnosticPrinter &operator<<(long N);
+  virtual DiagnosticPrinter &operator<<(unsigned long long N);
+  virtual DiagnosticPrinter &operator<<(long long N);
+  virtual DiagnosticPrinter &operator<<(const void *P);
+  virtual DiagnosticPrinter &operator<<(unsigned int N);
+  virtual DiagnosticPrinter &operator<<(int N);
+  virtual DiagnosticPrinter &operator<<(double N);
+  virtual DiagnosticPrinter &operator<<(const Twine &Str);
+
+  // IR related types.
+  virtual DiagnosticPrinter &operator<<(const Value &V);
+};
+} // End namespace llvm
+
+#endif