public override void Run(Grammar grammar, CompileResult result)
{
var containsAssertions = ContainsAssertionsEvaluator.Evaluate(grammar);
var zeroWidth = ZeroWidthEvaluator.Evaluate(grammar);
new ZeroWidthRepetitionTreeWalker(containsAssertions, zeroWidth, result).WalkGrammar(grammar);
}
/// <summary>
/// Detects which expressions in a <see cref="Grammar"/> are left-adjacent.
/// </summary>
/// <param name="grammar">The <see cref="Grammar"/> to inspect.</param>
/// <returns>A <see cref="ILookup{Rule, Expression}"/> containing the left-adjacent rules.</returns>
public static ILookup <Rule, Expression> Detect(Grammar grammar)
{
var leftAdjacent = new Dictionary <Rule, List <Expression> >();
var zeroWidth = ZeroWidthEvaluator.Evaluate(grammar);
new LeftRecursionExpressionTreeWalker(zeroWidth, leftAdjacent).WalkGrammar(grammar);
return(leftAdjacent.SelectMany(i => i.Value, (i, v) => new { i.Key, Value = v }).ToLookup(i => i.Key, i => i.Value));
}
