public IEnumerable<int> GetPositions(int position, RegexBlock block)
{
var zeroOrOneBlock = block as ZeroOrOneBlock;
if (zeroOrOneBlock != null)
return GetPositionsFromZeroOrOneBlock(position, zeroOrOneBlock);
var zeroOrMoreBlock = block as ZeroOrMoreBlock;
if (zeroOrMoreBlock != null)
return GetPositionsFromZeroOrMoreBlock(position, zeroOrMoreBlock);
var oneOrMoreBlock = block as OneOrMoreBlock;
if (oneOrMoreBlock != null)
return GetPositionsFromOneOrMoreBlock(position, oneOrMoreBlock);
var orGroupBlock = block as OrGroupBlock;
if (orGroupBlock != null)
return GetPositionsFromOrGroupBlock(position, orGroupBlock);
var andGroupBlock = block as AndGroupBlock;
if (andGroupBlock != null)
return GetPositionsFromAndGroupBlock(position, andGroupBlock);
var visitor = new CheckerRegexVisitor(position, _input, _groupValues);
return visitor.GetPositions(block);
}
/// <summary>
/// Search for and process all object blocks in the file.
/// </summary>
/// <returns></returns>
private IEnumerable <Block> ProcessBlocks()
{
// process found block strings
foreach (Match match in RegexBlock.Matches(Text))
{
yield return(new Block(this,
TextIndex.Skip(match.Index).Take(match.Length).ToList(),
Text.LineFromPosition(match.Index), match.Value));
}
}
public IEnumerable<int> GetPositions(RegexBlock block)
{
var enumerable = Visit(block) as IEnumerable<int>;
Contract.Assert(enumerable != null);
return enumerable;
}
private void CheckVisitorResult(BuilderRegexVisitor visitor, RegexBlock block, IEnumerable<string> expectedLines)
{
visitor.Visit(block);
var lines = visitor.Result;
CollectionAssert.AreEquivalent(expectedLines.ToList(), lines.ToList());
}
public void PushBlock(RegexBlock block)
{
_blocks.Push(block);
}
protected object Visit(RegexBlock block)
{
var textBlock = block as TextBlock;
if (textBlock != null)
{
return VisitTextBlock(textBlock);
}
var anyCharacterBlock = block as AnyCharacterBlock;
if (anyCharacterBlock != null)
{
return VisitAnyCharacterBlock(anyCharacterBlock);
}
var inclusiveSetBlock = block as InclusiveSetBlock;
if (inclusiveSetBlock != null)
{
return VisitInclusiveSetBlock(inclusiveSetBlock);
}
var exclusiveSetBlock = block as ExclusiveSetBlock;
if (exclusiveSetBlock != null)
{
return VisitExclusiveSetBlock(exclusiveSetBlock);
}
var zeroOrOneBlock = block as ZeroOrOneBlock;
if (zeroOrOneBlock != null)
{
return VisitZeroOrOneBlock(zeroOrOneBlock);
}
var zeroOrMoreBlock = block as ZeroOrMoreBlock;
if (zeroOrMoreBlock != null)
{
return VisitZeroOrMoreBlock(zeroOrMoreBlock);
}
var oneOrMoreBlock = block as OneOrMoreBlock;
if (oneOrMoreBlock != null)
{
return VisitOneOrMoreBlock(oneOrMoreBlock);
}
var orGroupBlock = block as OrGroupBlock;
if (orGroupBlock != null)
{
return VisitOrGroupBlock(orGroupBlock);
}
var andGroupBlock = block as AndGroupBlock;
if (andGroupBlock != null)
{
return VisitAndGroupBlock(andGroupBlock);
}
var backreferenceBlock = block as BackreferenceBlock;
if (backreferenceBlock != null)
{
return VisitBackreferenceBlock(backreferenceBlock);
}
return block;
}
public ZeroOrOneBlock(RegexBlock innerBlock)
: base(innerBlock)
{
}
private IEnumerable<int> GetPositionsFromBlock(int position, RegexBlock block)
{
foreach (var nextPosition in GetPositions(position, block))
{
yield return nextPosition;
foreach (var nestedNextPosition in GetPositionsFromBlock(nextPosition, block))
{
yield return nestedNextPosition;
}
}
}
public QuantifierBlock(RegexBlock innerBlock)
{
InnerBlock = innerBlock;
}
public OneOrMoreBlock(RegexBlock innerBlock)
: base(innerBlock)
{
}
private static bool IsCharacterContainer(RegexBlock block)
{
return block is TextBlock || block is SetBlock;
}
private static RegexBlock AddCharacter(RegexBlock container, char c)
{
var textBlock = container as TextBlock;
if (textBlock != null)
{
return new TextBlock(textBlock.Text + c);
}
var inclusiveSetBlock = container as InclusiveSetBlock;
if (inclusiveSetBlock != null)
{
return new InclusiveSetBlock(inclusiveSetBlock.Characters + c);
}
var exclusiveSetBlock = container as ExclusiveSetBlock;
if (exclusiveSetBlock != null)
{
return new ExclusiveSetBlock(exclusiveSetBlock.Characters + c);
}
return null;
}
