static NumberLexerRule()
{
var states = new DfaState[5];
for (int i = 0; i < states.Length; i++)
states[i] = new DfaState(i==4 || i== 2);
var zeroThroughNine = new RangeTerminal('0', '9');
var plusOrMinusTo1 = new DfaTransition(new SetTerminal('+', '-'), states[1]);
var dotTo3 = new DfaTransition(new CharacterTerminal('.'), states[3]);
var zeroThroughNineTo2 = new DfaTransition(zeroThroughNine, states[2]);
var zeroThroughNineTo4 = new DfaTransition(zeroThroughNine, states[4]);
states[0].AddTransition(dotTo3);
states[0].AddTransition(plusOrMinusTo1);
states[0].AddTransition(zeroThroughNineTo2);
states[1].AddTransition(dotTo3);
states[1].AddTransition(zeroThroughNineTo2);
states[2].AddTransition(zeroThroughNineTo2);
states[2].AddTransition(dotTo3);
states[3].AddTransition(zeroThroughNineTo4);
states[4].AddTransition(zeroThroughNineTo4);
_start = states[0];
}
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 ProductionExpressionShouldSupportAlterationOfStringAndTerminal()
{
ProductionExpression
S = "S";
BaseTerminal
a = new RangeTerminal('a', 'b');
S.Rule = (Expr)"b" | a;
Assert.IsNotNull(S.ProductionModel);
Assert.AreEqual(2, S.ProductionModel.Alterations.Count);
Assert.AreEqual(1, S.ProductionModel.Alterations[0].Symbols.Count);
Assert.AreEqual(1, S.ProductionModel.Alterations[1].Symbols.Count);
}
public void RangeTerminalWhenInputIsLessThanLowerBoundShouldFail()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsFalse(rangeTerminal.IsMatch('0'));
}
public void RangeTerminalWhenInputGreaterThanUpperBoundShouldFail()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsFalse(rangeTerminal.IsMatch('A'));
}
public void RangeTerminalWhenInputBetweenBoundsShouldMatch()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsTrue(rangeTerminal.IsMatch('l'));
}
public void Test_RangeTerminal_That_When_Start_Less_Than_Lower_Bound_IsMatch_Returns_False()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsFalse(rangeTerminal.IsMatch('0'));
}
public void Test_RangeTerminal_That_When_End_Greater_Than_Upper_Bound_IsMatch_Returns_False()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsFalse(rangeTerminal.IsMatch('A'));
}
public void Test_RangeTerminal_That_When_Character_Between_Bounds_IsMatch_Returns_True()
{
var rangeTerminal = new RangeTerminal('a', 'z');
Assert.IsTrue(rangeTerminal.IsMatch('l'));
}
public ITerminalBuilder Range(char start, char end)
{
var rangeTerminal = new RangeTerminal(start, end);
_terminals.Add(rangeTerminal);
return this;
}
private static INfa Range(RegexCharacterRange range, bool negate)
{
// combine characters into a character range terminal
var start = range.StartCharacter.Value;
var end = range.EndCharacter.Value;
ITerminal terminal = new RangeTerminal(start, end);
var nfaStartState = new NfaState();
var nfaEndState = new NfaState();
if (negate)
terminal = new NegationTerminal(terminal);
nfaStartState.AddTransistion(
new TerminalNfaTransition(terminal, nfaEndState));
return new Nfa(nfaStartState, nfaEndState);
}
