[binutils-gdb] Default initialize enum flags to 0

[Simon Marchi <simark at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1b90b1390679473dd84416e462afa1587769ceec

commit 1b90b1390679473dd84416e462afa1587769ceec
Author: Simon Marchi <simon.marchi@ericsson.com>
Date:   Tue Feb 21 11:48:49 2017 -0500

    Default initialize enum flags to 0
    
    ... so that we don't need to do it manually, and potentially forget.
    For example, this allows to do:
    
      my_flags flags;
    
      ...
    
      flags |= some_flag;
    
    gdb/ChangeLog:
    
    	* common/enum-flags.h (enum_flags::enum_flags): Initialize
    	m_enum_value to 0 in default constructor.

Diff:
---
 gdb/ChangeLog           | 5 +++++
 gdb/common/enum-flags.h | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 49ffd4a..1e0e50e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-02-21  Simon Marchi  <simon.marchi@ericsson.com>
+
+	* common/enum-flags.h (enum_flags::enum_flags): Initialize
+	m_enum_value to 0 in default constructor.
+
 2017-02-21  Edjunior Barbosa Machado  <emachado@linux.vnet.ibm.com>
 
 	* rs6000-tdep.c (LOAD_AND_RESERVE_MASK): Rename from LWARX_MASK.
diff --git a/gdb/common/enum-flags.h b/gdb/common/enum-flags.h
index 5b8c3ebc..e63c8a4 100644
--- a/gdb/common/enum-flags.h
+++ b/gdb/common/enum-flags.h
@@ -115,8 +115,9 @@ private:
   }
 
 public:
-  /* Allow default construction, just like raw enums.  */
+  /* Allow default construction.  */
   enum_flags ()
+    : m_enum_value ((enum_type) 0)
   {}
 
   enum_flags (const enum_flags &other)