[Support][Endian] Overload += and -=

This patch is to overload operator+= and operator-= for
{u}{little}{big}{16,32,64}_t.

llvm-svn: 217637

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/include/llvm/Support/Endian.h b/llvm/include/llvm/Support/Endian.h
index 75f3292ac4a..47b82fdc497 100644
--- a/llvm/include/llvm/Support/Endian.h
+++ b/llvm/include/llvm/Support/Endian.h
@@ -93,6 +93,16 @@ struct packed_endian_specific_integral {
       (void*)Value.buffer, newValue);
   }
 
+  packed_endian_specific_integral &operator+=(value_type newValue) {
+    *this = *this + newValue;
+    return *this;
+  }
+
+  packed_endian_specific_integral &operator-=(value_type newValue) {
+    *this = *this - newValue;
+    return *this;
+  }
+
 private:
   AlignedCharArray<PickAlignment<value_type, alignment>::value,
                    sizeof(value_type)> Value;