protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.END_ARG_ARRAY);
Utils.CheckNotEnd(script, m_name);
List <Variable> arrayIndices = Utils.GetArrayIndices(ref varName);
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Utils.CheckNotNull(varName, func);
Variable currentValue = func.GetValue(script);
Variable element = currentValue;
// 2b. Special case for an array.
if (arrayIndices.Count > 0)// array element
{
element = Utils.ExtractArrayElement(currentValue, arrayIndices);
script.MoveForwardIf(Constants.END_ARRAY);
}
// 3. Convert type to string.
string type = Constants.TypeToString(element.Type);
script.MoveForwardIf(Constants.END_ARG, Constants.SPACE);
Variable newValue = new Variable(type);
return(newValue);
}
protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.NEXT_OR_END_ARRAY);
Utils.CheckNotEnd(script, Constants.CONTAINS);
// 2. Get the current value of the variable.
List <Variable> arrayIndices = Utils.GetArrayIndices(ref varName);
ParserFunction func = ParserFunction.GetFunction(varName);
Utils.CheckNotNull(varName, func);
Variable currentValue = func.GetValue(script);
// 2b. Special dealings with arrays:
Variable query = arrayIndices.Count > 0 ?
Utils.ExtractArrayElement(currentValue, arrayIndices) :
currentValue;
// 3. Get the value to be looked for.
Variable searchValue = Utils.GetItem(script);
Utils.CheckNotEnd(script, Constants.CONTAINS);
// 4. Check if the value to search for exists.
bool exists = query.Exists(searchValue, true /* notEmpty */);
script.MoveBackIf(Constants.START_GROUP);
return(new Variable(exists));
}
public static Variable GetItem(ParsingScript script, bool eatLast = true)
{
script.MoveForwardIf(Constants.NEXT_ARG, Constants.SPACE);
Utils.CheckNotEnd(script);
bool inQuotes = script.Current == Constants.QUOTE;
if (script.Current == Constants.START_GROUP)
{
// We are extracting a list between curly braces.
script.Forward(); // Skip the first brace.
bool isList = true;
Variable value = new Variable();
value.Tuple = GetArgs(script,
Constants.START_GROUP, Constants.END_GROUP, out isList);
return(value);
}
// A variable, a function, or a number.
Variable var = script.Execute(Constants.NEXT_OR_END_ARRAY);
//value = var.Clone();
if (inQuotes)
{
script.MoveForwardIf(Constants.QUOTE);
}
if (eatLast)
{
script.MoveForwardIf(Constants.END_ARG, Constants.SPACE);
}
return(var);
}
protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.NEXT_OR_END_ARRAY);
Utils.CheckNotEnd(script, m_name);
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Utils.CheckNotNull(varName, func);
Variable currentValue = func.GetValue(script);
Utils.CheckArray(currentValue, varName);
// 3. Get the variable to remove.
Variable item = Utils.GetItem(script);
Utils.CheckNonNegativeInt(item);
currentValue.Tuple.RemoveAt(item.AsInt());
ParserFunction.AddGlobalOrLocalVariable(varName,
new GetVarFunction(currentValue));
return(Variable.EmptyInstance);
}
protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.END_ARG_ARRAY);
Utils.CheckNotEnd(script, m_name);
List <Variable> arrayIndices = Utils.GetArrayIndices(ref varName);
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Utils.CheckNotNull(varName, func);
Variable currentValue = func.GetValue(script);
Variable element = currentValue;
// 2b. Special case for an array.
if (arrayIndices.Count > 0)// array element
{
element = Utils.ExtractArrayElement(currentValue, arrayIndices);
script.MoveForwardIf(Constants.END_ARRAY);
}
// 3. Take either the length of the underlying tuple or
// string part if it is defined,
// or the numerical part converted to a string otherwise.
int size = element.Type == Variable.VarType.ARRAY ?
element.Tuple.Count :
element.AsString().Length;
script.MoveForwardIf(Constants.END_ARG, Constants.SPACE);
Variable newValue = new Variable(size);
return(newValue);
}
protected override Variable Evaluate(ParsingScript script)
{
// 1. Get the name of the variable.
string varName = Utils.GetToken(script, Constants.NEXT_OR_END_ARRAY);
Utils.CheckNotEnd(script, Constants.CONTAINS);
// 2. Get the current value of the variable.
ParserFunction func = ParserFunction.GetFunction(varName);
Utils.CheckNotNull(varName, func);
Variable currentValue = func.GetValue(script);
// 3. Get the variable to add.
Variable item = Utils.GetItem(script);
// 4. Add it to the tuple.
currentValue.AddVariable(item);
ParserFunction.AddGlobalOrLocalVariable(varName,
new GetVarFunction(currentValue));
return(currentValue);
}