/// <summary>
/// Evaluates the current input as a integer
/// </summary>
/// <returns></returns>
public NumberExpression EvaluateInt()
{
NumberExpression retVal = null;
int backup = Index;
int len = 0;
bool digitFound = false;
Types.Type type = EFSSystem.IntegerType;
if (Index < Buffer.Length && Buffer[Index] == '-')
{
len += 1;
}
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
digitFound = true;
len = len + 1;
}
if (len > 0 && Index + len < Buffer.Length && Buffer[Index + len] == '.')
{
type = EFSSystem.DoubleType;
len = len + 1;
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
len = len + 1;
}
}
if (Index + len < Buffer.Length && Buffer[Index + len] == 'E')
{
type = EFSSystem.DoubleType;
len = len + 1;
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
len = len + 1;
}
}
if (digitFound)
{
string str = new String(Buffer, Index, len);
retVal = new NumberExpression(Root, str, type);
Index += len;
}
if (retVal == null)
{
Index = backup;
}
return(retVal);
}
/// <summary>
/// Visits a Number expression
/// </summary>
/// <param name="numberExpression"></param>
protected virtual void VisitNumberExpression(NumberExpression numberExpression)
{
}
/// <summary>
/// Visits a Number expression
/// </summary>
/// <param name="numberExpression"></param>
protected virtual void VisitNumberExpression(NumberExpression numberExpression)
{
}
/// <summary>
/// Evaluates the current input as a integer
/// </summary>
/// <returns></returns>
public NumberExpression EvaluateInt()
{
NumberExpression retVal = null;
int start = Index;
int len = 0;
bool digitFound = false;
Type type = EfsSystem.Instance.IntegerType;
if (Index < Buffer.Length && Buffer[Index] == '-')
{
len += 1;
}
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
digitFound = true;
len = len + 1;
}
if (len > 0 && Index + len < Buffer.Length && Buffer[Index + len] == '.')
{
type = EfsSystem.Instance.DoubleType;
len = len + 1;
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
len = len + 1;
}
}
if (Index + len < Buffer.Length && Buffer[Index + len] == 'E')
{
type = EfsSystem.Instance.DoubleType;
len = len + 1;
while (Index + len < Buffer.Length && Char.IsDigit(Buffer[Index + len]))
{
len = len + 1;
}
}
if (digitFound)
{
string str = new String(Buffer, Index, len);
retVal = new NumberExpression(Root, RootLog, str, type, start, str.Length);
Index += len;
}
if (retVal == null)
{
Index = start;
}
return retVal;
}
