/// <summary>
/// Кумуляция (сжатие).
/// </summary>
/// <param name="numbers"></param>
/// <returns></returns>
public static NumberRangeCollection Cumulate
(
List <NumberText> numbers
)
{
NumberRangeCollection result
= new NumberRangeCollection();
if (numbers.Count != 0)
{
numbers.Sort();
NumberText previous = numbers[0];
NumberText last = previous.Copy();
for (int i = 1; i < numbers.Count; i++)
{
NumberText current = numbers[i];
NumberText next = last + 1;
if (current != next)
{
result.Add
(
new NumberRange
(
previous,
last
)
);
previous = current.Copy();
}
last = current;
}
result.Add
(
new NumberRange
(
previous,
last
)
);
}
return(result);
}
/// <summary>
/// Разбор текстового представления.
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static NumberRangeCollection Parse
(
string text
)
{
if (string.IsNullOrEmpty(text))
{
throw new ArgumentNullException("text");
}
AntlrInputStream stream = new AntlrInputStream(text);
NumberRangesLexer lexer = new NumberRangesLexer(stream);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumberRangesParser parser = new NumberRangesParser(tokens);
NumberRangesParser.ProgramContext tree = parser.program();
NumberRangeCollection result = new NumberRangeCollection(tree);
return(result);
}