进行了优化，减少了上帝结构体的符号表占用

lib/core/Handles/HandlesExpr.py

@@ -328,7 +328,7 @@ class ExprHandle(BaseHandle):
         # 如果 _define_constants 中没有，尝试从符号表查找
         if VarName not in getattr(Gen, '_define_constants', {}):
             try:
-                sym_info = self.translator.SymbolTable.get(VarName)
+                sym_info = self.translator.SymbolTable.lookup(VarName)
                 if sym_info and sym_info.IsDefine and sym_info.DefineValue is not None:
                     val = sym_info.DefineValue
                     if isinstance(val, int):
@@ -398,7 +398,7 @@ class ExprHandle(BaseHandle):
             return ir.Constant(ir.IntType(8).as_pointer(), None)
         if VarName == 'True' or VarName == 'False':
             return ir.Constant(ir.IntType(32), 1 if VarName == 'True' else 0)
-        if VarName in self.Trans.SymbolTable:
+        if self.Trans.SymbolTable.has(VarName):
             SymInfo = self.Trans.SymbolTable[VarName]
             if SymInfo.IsEnumMember and isinstance(SymInfo.value, int):
                 return ir.Constant(ir.IntType(32), SymInfo.value)