Welcome to the Lounge

var result = CD.Struct("Token", false,
	CD.Field(typeof(int), "Line", MemberAttributes.Public),
	CD.Field(typeof(int), "Column", MemberAttributes.Public),
	CD.Field(typeof(long), "Position", MemberAttributes.Public),
	CD.Field(typeof(int), "SymbolId", MemberAttributes.Public),
	CD.Field(typeof(string), "Value", MemberAttributes.Public));
result.CustomAttributes.Add(_GeneratedCodeAttribute);
return result;

public struct Token
{
	public int Line;
	public int Column;
	public long Position;
	public int SymbolId;
	public string Value;
}

result.Statements.AddRange(new CodeStatement[] {
	CD.If(CD.Invoke(input,"MoveNext"),
		CD.IfElse(CD.NotEq(state,CD.Literal(_BeforeBegin)), new CodeStatement[] {
			CD.Let(position,CD.Add(position,CD.One)),
			CD.IfElse(CD.Eq(CD.Literal('\n'),current),new CodeStatement[] {
				CD.Let(column,CD.One),
				CD.Let(line,CD.Add(line,CD.One))
			},
				CD.IfElse(CD.Eq(CD.Literal('\t'),current),new CodeStatement[]
				{
					CD.Let(column,CD.Add(column,CD.Literal(_TabWidth)))
				},
					CD.Let(column,CD.Add(column,CD.One))))
		},
		CD.IfElse(CD.Eq(CD.Literal('\n'),current),new CodeStatement[] {
			CD.Let(column,CD.One),
			CD.Let(line,CD.Add(line,CD.One))
		},
			CD.If(CD.Eq(CD.Literal('\t'),current),
				CD.Let(column,CD.Add(column,CD.Literal(_TabWidth-1))))
			)
		),
		CD.Return(CD.True)),
	CD.Let(state,CD.Literal(_InnerFinished)),
	CD.Return(CD.False)
});
return result;

bool _MoveNextInput()
{
	if (_input.MoveNext())
	{
		if (_BeforeBegin != _state)
		{
			++_position;
			if ('\n' == _input.Current)
			{
				_column = 1;
				++_line;
			}
			else if ('\t' == _input.Current)
				_column += _TabWidth;
			else
				++_column;
		} else
		{
			// corner case for first move
			if ('\n' == _input.Current)
			{
				_column = 1;
				++_line;
			}
			else if ('\t' == _input.Current)
				_column += _TabWidth-1;
		}
		return true;
	}
	_state = _InnerFinished;
	return false;
}

var state = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(),"_state");
var letStateOne = new CodeAssignStatement(state,new CodePrimitiveExpression(1));

this._state=1;

Quote:

So I've decided to make my own programming language

honey the codewitch wrote:

He'll survive.

Quote:

OTOH I've developed a taste for Coffee.