protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.NEXT_ARG_ARRAY);
Utils.CheckNotEmpty(script, varName, m_name);
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetVariable(varName, script);
Variable currentValue = func.GetValue(script);
// 3. Get the value to be added or appended.
Variable newValue = Utils.GetItem(script);
// 4. Take either the string part if it is defined,
// or the numerical part converted to a string otherwise.
string arg1 = currentValue.AsString();
string arg2 = newValue.AsString();
// 5. The variable becomes a string after adding a string to it.
newValue.Reset();
newValue.String = arg1 + arg2;
ParserFunction.AddGlobalOrLocalVariable(varName, new GetVarFunction(newValue), script);
return(newValue);
}
public static Variable GetVariable(string varName, ParsingScript script, bool testNull = true)
{
ParserFunction func = ParserFunction.GetVariable(varName, script);
if (!testNull && func == null)
{
return(null);
}
Utils.CheckNotNull(varName, func, script);
Variable varValue = func.GetValue(script);
Utils.CheckNotNull(varValue, varName, script);
return(varValue);
}
static List <Variable> Split(ParsingScript script, char[] to)
{
List <Variable> listToMerge = new List <Variable>(16);
if (!script.StillValid() || to.Contains(script.Current))
{
listToMerge.Add(Variable.EmptyInstance);
script.Forward();
return(listToMerge);
}
int arrayIndexDepth = 0;
bool inQuotes = false;
int negated = 0;
char ch;
string action;
do
{ // Main processing cycle of the first part.
string token = ExtractNextToken(script, to, ref inQuotes, ref arrayIndexDepth, ref negated, out ch, out action);
bool ternary = UpdateIfTernary(script, token, ch, listToMerge, (List <Variable> newList) => { listToMerge = newList; });
if (ternary)
{
return(listToMerge);
}
bool negSign = CheckConsistencyAndSign(script, listToMerge, action, ref token);
// We are done getting the next token. The GetValue() call below may
// recursively call SplitAndMerge(). This will happen if extracted
// item is a function or if the next item is starting with a START_ARG '('.
ParserFunction func = new ParserFunction(script, token, ch, ref action);
Variable current = func.GetValue(script);
if (UpdateResult(script, to, listToMerge, token, negSign, ref current, ref negated, ref action))
{
return(listToMerge);
}
} while (script.StillValid() &&
(inQuotes || arrayIndexDepth > 0 || !to.Contains(script.Current)));
// This happens when called recursively inside of the math expression:
script.MoveForwardIf(Constants.END_ARG);
return(listToMerge);
}