public void ChartEnqueShouldAvoidDuplication()
{
ProductionExpression L = "L";
var aToZ = new RangeTerminal('a', 'z');
L.Rule = L + aToZ | aToZ;
var grammar = new GrammarExpression(L, new[] { L }).ToGrammar();
var chart = new Chart();
var firstState = new NormalState(grammar.Productions[0], 0, 1);
var secondState = new NormalState(grammar.Productions[0], 0, 1);
chart.Enqueue(0, firstState);
chart.Enqueue(0, secondState);
Assert.AreEqual(1, chart.EarleySets[0].Predictions.Count);
}
public void Test_Chart_That_Enqueue_Avoids_Duplicates()
{
var grammar = new GrammarBuilder("L")
.Production("L", r => r
.Rule("L", new RangeTerminal('a', 'z'))
.Rule(new RangeTerminal('a','z')))
.ToGrammar();
var chart = new Chart();
var firstState = new State(grammar.Productions[0], 0, 1);
var secondState = new State(grammar.Productions[0], 0, 1);
chart.Enqueue(0, firstState);
chart.Enqueue(0, secondState);
Assert.AreEqual(1, chart.EarleySets[0].Predictions.Count);
}
private void Initialize()
{
Location = 0;
_chart = new Chart();
foreach (var startProduction in Grammar.StartProductions())
{
var startState = new NormalState(startProduction, 0, 0);
if (_chart.Enqueue(0, startState))
Log("Start", 0, startState);
}
ReductionPass(Location);
}