private static IEnumerable <SqlGrammarRuleSequence> GetCompatibleSequences(SqlGrammarRuleSequence sequence, StatementGrammarNode parentNode)
{
var inputItems = sequence.Items
.Cast <ISqlGrammarRuleSequenceItem>()
.TakeWhileInclusive(i => !i.IsRequired);
var isInputSequence = inputItems.Any(i => String.Equals(i.Id, parentNode.ChildNodes[0].Id));
return(isInputSequence
? Enumerable.Repeat(sequence, 1)
: inputItems.Where(i => i.Type == NodeType.NonTerminal)
.SelectMany(i => NonTerminalRules[i.Id].Sequences)
.SelectMany(s => GetCompatibleSequences(s, parentNode)));
}
private static IEnumerable<SqlGrammarRuleSequence> GetCompatibleSequences(SqlGrammarRuleSequence sequence, StatementGrammarNode parentNode)
{
var inputItems = sequence.Items
.Cast<ISqlGrammarRuleSequenceItem>()
.TakeWhileInclusive(i => !i.IsRequired);
var isInputSequence = inputItems.Any(i => String.Equals(i.Id, parentNode.ChildNodes[0].Id));
return isInputSequence
? Enumerable.Repeat(sequence, 1)
: inputItems.Where(i => i.Type == NodeType.NonTerminal)
.SelectMany(i => NonTerminalRules[i.Id].Sequences)
.SelectMany(s => GetCompatibleSequences(s, parentNode));
}