SymbolDatabase: add constness attribute for Variable

lib/symboldatabase.cpp

@@ -1791,6 +1791,9 @@ const Token * Variable::declEndToken() const
 
 void Variable::evaluate(const Library* lib)
 {
+    unsigned int pointer = 0;
+    _constness = 0;
+
     if (_name)
         setFlag(fIsArray, arrayDimensions(lib));
 
@@ -1809,11 +1812,13 @@ void Variable::evaluate(const Library* lib)
             setFlag(fIsVolatile, true);
         else if (tok->str() == "mutable")
             setFlag(fIsMutable, true);
-        else if (tok->str() == "const")
+        else if (tok->str() == "const") {
             setFlag(fIsConst, true);
-        else if (tok->str() == "*") {
+            _constness |= 1 << pointer;
+        } else if (tok->str() == "*") {
             setFlag(fIsPointer, !isArray() || Token::Match(tok->previous(), "( * %name% )"));
             setFlag(fIsConst, false); // Points to const, isn't necessarily const itself
+            ++pointer;
         } else if (tok->str() == "&") {
             if (isReference())
                 setFlag(fIsRValueRef, true);
@@ -3045,6 +3050,7 @@ void SymbolDatabase::printXml(std::ostream &out) const
         out << " isPointer=\""      << var->isPointer() << '\"';
         out << " isReference=\""    << var->isReference() << '\"';
         out << " isStatic=\""       << var->isStatic() << '\"';
+        out << " constness=\""      << var->constness() << '\"';
         out << " access=\""         << accessControlToString(var->_access) << '\"';
         out << "/>" << std::endl;
     }

lib/symboldatabase.h

@@ -229,6 +229,7 @@ public:
           _index(index_),
           _access(access_),
           _flags(0),
+          _constness(0),
           _type(type_),
           _scope(scope_) {
         evaluate(lib);
@@ -599,6 +600,10 @@ public:
 
     void setFlags(const ValueType &valuetype);
 
+    unsigned int constness() const {
+        return _constness;
+    }
+
 private:
     // only symbol database can change the type
     friend class SymbolDatabase;
@@ -629,6 +634,9 @@ private:
     /** @brief flags */
     unsigned int _flags;
 
+    /** @brief constness (same encoding as ValueType::constness) */
+    unsigned int _constness;
+
     /** @brief pointer to user defined type info (for known types) */
     const Type *_type;