Add reverseColor to raw_ostream.

To be used in printing unprintable source in clang diagnostics.
Patch by Seth Cantrell!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154800 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/Support/Process.h b/include/llvm/Support/Process.h
index 33799229ff..d796b7906d 100644
--- a/include/llvm/Support/Process.h
+++ b/include/llvm/Support/Process.h
@@ -136,6 +136,10 @@ namespace sys {
       /// Same as OutputColor, but only enables the bold attribute.
       static const char *OutputBold(bool bg);
 
+      /// This function returns the escape sequence to reverse forground and
+      /// background colors.
+      static const char *OutputReverse();
+
       /// Resets the terminals colors, or returns an escape sequence to do so.
       static const char *ResetColor();
     /// @}
diff --git a/include/llvm/Support/raw_ostream.h b/include/llvm/Support/raw_ostream.h
index 6bfae5e298..6c5d4787e0 100644
--- a/include/llvm/Support/raw_ostream.h
+++ b/include/llvm/Support/raw_ostream.h
@@ -222,6 +222,9 @@ public:
   /// outputting colored text, or before program exit.
   virtual raw_ostream &resetColor() { return *this; }
 
+  /// Reverses the forground and background colors.
+  virtual raw_ostream &reverseColor() { return *this; }
+
   /// This function determines if this stream is connected to a "tty" or
   /// "console" window. That is, the output would be displayed to the user
   /// rather than being put on a pipe or stored in a file.
@@ -379,6 +382,8 @@ public:
                                    bool bg=false);
   virtual raw_ostream &resetColor();
 
+  virtual raw_ostream &reverseColor();
+
   virtual bool is_displayed() const;
 
   /// has_error - Return the value of the flag in this raw_fd_ostream indicating