|
public static BuildLiteralNode ( |
||
| literalToken | ||
| return | ||
private static IEnumerable <LiteralNode> Expand(INode bracketNode)
{
foreach (var childNode in bracketNode.ChildNodes)
{
switch (childNode.Token.TokenType)
{
case TokenType.Literal:
yield return((LiteralNode)childNode);
break;
case TokenType.Range:
var min = (int)((LiteralNode)childNode.ChildNodes[0]).Token.Character;
var max = (int)((LiteralNode)childNode.ChildNodes[1]).Token.Character;
for (var i = min; i <= max; i++)
{
var c = (char)i;
yield return(NodeBuilder.BuildLiteralNode(TokenBuilder.BuildLiteralToken(c)));
}
break;
case TokenType.BracketRight:
foreach (var node in Expand(childNode))
{
yield return(node);
}
break;
}
}
}
public void Visit(NotNode node)
{
var nodes = new LiteralNodeCollection();
for (var i = 32; i < 126; i++)
{
nodes.Add(NodeBuilder.BuildLiteralNode(TokenBuilder.BuildLiteralToken((char)i)));
}
INode current = node;
while (current.ChildNodes[0].Token.TokenType == TokenType.Concatenation)
{
current = node.ChildNodes[0];
}
foreach (var expandedNode in Expand(current))
{
if (nodes.Contains(expandedNode))
{
nodes.Remove(expandedNode);
}
}
var index = RandomNumberProvider.GetRandomNumber(0, nodes.Count);
nodes[index].Accept(this);
}