[Patch] BaseTools: Add check for the string type whether is same

[Yonghong Zhu <yonghong.zhu@intel.com>]

From: zhijufan <zhijux.fan@intel.com>

Relational and equality operators require both operands to be of
the same type.
Treat the string 'A' and "A" as same type, but for "A" and L"A"
are not same type since one is general string, another is unicode
string.

True:'A'<'B', "A"<"B" 'A'<"B", L'A'<L'B', L"A"<L"B", L'A'<L"B"
Error:'A'<L'B', 'A'<L"B", "A'<L'B'

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
---
 BaseTools/Source/Python/Common/Expression.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 78c69fa..84898f7 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -295,12 +295,12 @@ class ValueExpression(BaseExpression):
                     # bitwise and logical operation between number and boolean is allowed
                     pass
                 else:
                     raise BadExpression(ERR_EXPR_TYPE)
             if isinstance(Oprand1, type('')) and isinstance(Oprand2, type('')):
-                if (Oprand1.startswith('L"') and not Oprand2.startswith('L"')) or \
-                    (not Oprand1.startswith('L"') and Oprand2.startswith('L"')):
+                if ((Oprand1.startswith('L"') or Oprand1.startswith('L')) and (not Oprand2.startswith('L"')) and (not Oprand2.startswith("L'"))) or \
+                        (((not Oprand1.startswith('L"')) and (not Oprand1.startswith("L'"))) and (Oprand2.startswith('L"') or Oprand2.startswith('L'))):
                     raise BadExpression(ERR_STRING_CMP % (Oprand1, Operator, Oprand2))
             if 'in' in Operator and isinstance(Oprand2, type('')):
                 Oprand2 = Oprand2.split()
             EvalStr = 'Oprand1 ' + Operator + ' Oprand2'
 
@@ -825,10 +825,12 @@ class ValueExpressionEx(ValueExpression):
         except BadExpression as Value:
             if self.PcdType in TAB_PCD_NUMERIC_TYPES:
                 PcdValue = PcdValue.strip()
                 if PcdValue.startswith('{') and PcdValue.endswith('}'):
                     PcdValue = SplitPcdValueString(PcdValue[1:-1])
+                if ERR_STRING_CMP.split(':')[0] in Value.message:
+                    raise BadExpression("Type: %s, Value: %s, %s" % (self.PcdType, PcdValue, Value))
                 if isinstance(PcdValue, type([])):
                     TmpValue = 0
                     Size = 0
                     ValueType = ''
                     for Item in PcdValue:
-- 
2.6.1.windows.1