allow the use of keywords for strings without quotation marks

apps/opencs/model/filter/parser.cpp

@@ -49,19 +49,31 @@ namespace CSMFilter
 
         Token (Type type = Type_None);
 
+        Token (Type type, const std::string& string);
+        ///< Non-string type that can also be interpreted as a string.
+
         Token (const std::string& string);
 
         Token (double number);
 
         operator bool() const;
+
+        bool isString() const;
     };
 
     Token::Token (Type type) : mType (type) {}
 
+    Token::Token (Type type, const std::string& string) : mType (type), mString (string) {}
+
     Token::Token (const std::string& string) : mType (Type_String), mString (string) {}
 
     Token::Token (double number) : mType (Type_Number), mNumber (number) {}
 
+    bool Token::isString() const
+    {
+        return mType==Type_String || mType>=Type_Keyword_True;
+    }
+
     Token::operator bool() const
     {
         return mType!=Type_None;
@@ -182,7 +194,7 @@ CSMFilter::Token CSMFilter::Parser::checkKeywords (const Token& token)
 
     for (int i=0; sKeywords[i]; ++i)
         if (sKeywords[i]==string || (string.size()==1 && sKeywords[i][0]==string[0]))
-            return Token (static_cast<Token::Type> (i+Token::Type_Keyword_True));
+            return Token (static_cast<Token::Type> (i+Token::Type_Keyword_True), token.mString);
 
     return token;
 }
@@ -351,7 +363,7 @@ boost::shared_ptr<CSMFilter::Node> CSMFilter::Parser::parseText()
         if (static_cast<int> (token.mNumber)==token.mNumber)
             columnId = static_cast<int> (token.mNumber);
     }
-    else if (token.mType==Token::Type_String)
+    else if (token.isString())
     {
         columnId = CSMWorld::Columns::getId (token.mString);
     }
@@ -373,7 +385,7 @@ boost::shared_ptr<CSMFilter::Node> CSMFilter::Parser::parseText()
     // parse text pattern
     token = getNextToken();
 
-    if (token.mType!=Token::Type_String)
+    if (!token.isString())
     {
         error();
         return boost::shared_ptr<Node>();
@@ -415,7 +427,7 @@ boost::shared_ptr<CSMFilter::Node> CSMFilter::Parser::parseValue()
         if (static_cast<int> (token.mNumber)==token.mNumber)
             columnId = static_cast<int> (token.mNumber);
     }
-    else if (token.mType==Token::Type_String)
+    else if (token.isString())
     {
         columnId = CSMWorld::Columns::getId (token.mString);
     }
@@ -561,6 +573,8 @@ bool CSMFilter::Parser::parse (const std::string& filter, bool allowPredefined)
 
         return true;
     }
+    // We do not use isString() here, because there could be a pre-defined filter with an ID that is
+    // equal a filter keyword.
     else if (token.mType==Token::Type_String && allowPredefined)
     {
         if (getNextToken()!=Token (Token::Type_EOS))