/// <summary>
/// Parse an VariableExpression
/// </summary>
/// <returns>Parsed VariableExpression</returns>
public VarExpression ParseVarExpression()
{
VarExpression varExpression = new VarExpression();
CurrentToken = TokenStream.NextToken();
varExpression.SetVariableIdentifier(CurrentToken.GetValue().ToString());
return varExpression;
}
public virtual void Visit(VarExpression expression)
{
VisitSubNodes(expression);
}
/// <summary>
/// Visit VarExpression
/// </summary>
/// <param name="expression">VarExpression to check</param>
public override void Visit(VarExpression expression)
{
//Check if expression is assigned to existing variable
if(!SymbolTable.ContainsVariable(expression.GetVariableIdentifier()))
{ //Add undefined variable exception
ExceptionList.Add(new UndefinedVariable(expression.GetVariableIdentifier()));
}
}