move hex character info from GUID expressions into seperate variable to facilitate reuse.

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
---
 BaseTools/Source/Python/Common/GlobalData.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/Common/GlobalData.py b/BaseTools/Source/Python/Common/GlobalData.py
index 4a85a8e0db63..4d0833a55b52 100644
--- a/BaseTools/Source/Python/Common/GlobalData.py
+++ b/BaseTools/Source/Python/Common/GlobalData.py
@@ -52,7 +52,8 @@ gMacroDefPattern = re.compile("^(DEFINE|EDK_GLOBAL)[ \t]+")
 gMacroNamePattern = re.compile("^{}$".format(_MacroNamePattern))
 
 # definition for a GUID.  used to create regular expressions below.
-_GuidPattern = r"[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}"
+_HexChar = r"[0-9a-fA-F]"
+_GuidPattern = r"{Hex}{8}-{Hex}{4}-{Hex}{4}-{Hex}{4}-{Hex}{12}".format(Hex=_HexChar)
 
 ## Regular expressions for GUID matching
 gGuidPattern = re.compile(r'{}'.format(_GuidPattern))
-- 
2.16.2.windows.1

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