public void ShouldBuildAutomatonTableFromTwoSequencesUsingAnyTerminal()
{
AutomatonTableFactory <char> factory;
IAutomatonTable <char> automatonTable;
LexicalRule rule1, rule2;
AutomatonTableParser parser;
factory = new AutomatonTableFactory <char>();
rule1 = RuleHelper.BuildRule("A*=a.c;");
rule2 = RuleHelper.BuildRule("B*=abc;");
automatonTable = factory.BuildAutomatonTable(SituationCollectionFactoryHelper.BuildSituationCollectionFactory(new LexicalRule[] { rule1, rule2 }), new DistinctInputFactory(new RangeValueProvider()));
Assert.IsNotNull(automatonTable);
parser = new AutomatonTableParser(automatonTable);
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('a')));
Assert.AreEqual(3, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('b')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('c')));
parser.Reset();
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('a')));
Assert.AreEqual(3, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('c')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('c')));
}
public void ShouldBuildStates3()
{
AutomatonTableFactory factory;
State[] states;
SituationSegmentFactory segmentFactory;
ISituation rootSituation;
segmentFactory = new SituationSegmentFactory();
rootSituation = segmentFactory.BuildRootSituation(
new Rule("A", Parse.Character('a').Then(Parse.Character('b').ThenCharacter('b').ThenCharacter('b').Perhaps()).ThenCharacter('c')),
new Rule("B", Parse.Character('a').ThenCharacter('b').ThenCharacter('e'))
);
factory = new AutomatonTableFactory();
states = factory.BuildStates(rootSituation);
Assert.AreEqual(7, states.Length);
Assert.AreEqual("A", ParseStates(states, 'a', 'b', 'b', 'b', 'c'));
Assert.AreEqual("A", ParseStates(states, 'a', 'c'));
Assert.ThrowsException <InvalidOperationException>(() => ParseStates(states, 'a', 'b', 'b', 'b', 'e'));
Assert.AreEqual("B", ParseStates(states, 'a', 'b', 'e'));
}
public void ShouldNotBuildStatesAndThrowExceptions()
{
AutomatonTableFactory factory;
factory = new AutomatonTableFactory();
Assert.ThrowsException <ArgumentNullException>(() => factory.BuildStates(null));
}
public static IAutomatonTable <char> BuildAutomatonTable(IEnumerable <string> Rules)
{
IAutomatonTableFactory <char> automatonTableFactory;
IAutomatonTable <char> automatonTable;
SituationCollectionFactory <char> situationCollectionFactory;
DistinctInputFactory distinctInputFactory;
distinctInputFactory = new DistinctInputFactory(new RangeValueProvider());
automatonTableFactory = new AutomatonTableFactory <char>( );
situationCollectionFactory = new SituationCollectionFactory <char>(SituationGraphHelper.BuildSituationGraph(Rules.Select(item => RuleHelper.BuildRule(item)).ToArray()));
automatonTable = automatonTableFactory.BuildAutomatonTable(situationCollectionFactory, distinctInputFactory);
return(automatonTable);
}
//private ICharReader reader;
public Lexer(params IRule[] Rules)
{
if (Rules == null)
{
throw new ArgumentNullException("Rules");
}
IAutomatonTableFactory automatonTableFactory;
ISituationSegmentFactory situationSegmentFactory;
ISituation rootSituation;
situationSegmentFactory = new SituationSegmentFactory();
rootSituation = situationSegmentFactory.BuildRootSituation(Rules);
automatonTableFactory = new AutomatonTableFactory();
this.states = automatonTableFactory.BuildStates(rootSituation);
}
public void ShouldBuildAutomatonTableFromExtendedSequence()
{
AutomatonTableFactory <char> factory;
IAutomatonTable <char> automatonTable;
LexicalRule rule;
Sequence predicate;
AutomatonTableParser parser;
factory = new AutomatonTableFactory <char>( );
predicate = new Sequence();
predicate.Items.Add(new Terminal('a'));
predicate.Items.Add(new Terminal('b'));
predicate.Items.Add(new Terminal('c'));
rule = new LexicalRule()
{
Name = "rule", IsAxiom = true
};
rule.Predicate = new ZeroOrMore()
{
Item = predicate
};
automatonTable = factory.BuildAutomatonTable(SituationCollectionFactoryHelper.BuildSituationCollectionFactory(rule.AsEnumerable()), new DistinctInputFactory(new RangeValueProvider()));
Assert.IsNotNull(automatonTable);
parser = new AutomatonTableParser(automatonTable);
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('a')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('b')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('c')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('a')));
}
public void ShouldBuildAutomatonTableFromBasicSequence()
{
AutomatonTableFactory <char> factory;
IAutomatonTable <char> automatonTable;
LexicalRule rule;
AutomatonTableParser parser;
factory = new AutomatonTableFactory <char>( );
rule = RuleHelper.BuildRule("A*=abc;");
automatonTable = factory.BuildAutomatonTable(SituationCollectionFactoryHelper.BuildSituationCollectionFactory(rule.AsEnumerable()), new DistinctInputFactory(new RangeValueProvider()));
Assert.IsNotNull(automatonTable);
parser = new AutomatonTableParser(automatonTable);
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('a')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('b')));
Assert.AreEqual(1, parser.ActionCount);
Assert.IsTrue(parser.Parse(new TerminalInput('c')));
}
public void ShouldBuildStates()
{
AutomatonTableFactory factory;
State[] states;
SituationSegmentFactory segmentFactory;
ISituation rootSituation;
segmentFactory = new SituationSegmentFactory();
rootSituation = segmentFactory.BuildRootSituation(
new Rule("A", Parse.Character('a').ThenCharacter('b').ThenCharacter('c')),
new Rule("B", Parse.Character('a').ThenCharacter('b').ThenAnyCharacter())
);
factory = new AutomatonTableFactory();
states = factory.BuildStates(rootSituation);
Assert.AreEqual(5, states.Length);
Assert.AreEqual("A", ParseStates(states, 'a', 'b', 'c'));
Assert.AreEqual("B", ParseStates(states, 'a', 'b', 'd'));
}
//private static char[] alphabet = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 's', 't', '*' };
public MainWindow()
{
InitializeComponent();
lexicalAutomatonTableFactory = new AutomatonTableFactory <char>();
syntaxicAutomatonTableFactory = new AutomatonTableFactory <FSMLib.SyntaxicAnalysis.Token>();
views = new ObservableCollection <GraphView>();
tabControl.ItemsSource = views;
CreateLexicalView(@"S*=\$;",
@"E=\\$;",
@"NE=a;",
@"L*={NE}|{E};",
@"S*={L}+;");
/*@"Symbol*=\[|\]|\{|\}|\.|\+|\*|\?|\||\;|\=|\!|\\;",
* @"EscapedChar=\\.;",
* @"NonEscapedChar=!\[|!\]|!\{|!\}|!\.|!\+|!\*|!\?|!\||!\;|!\=|!\!|!\\;",
* @"Letter*={NonEscapedChar}|{EscapedChar};",
* @"String*={Letter}+;",*/
CreateSyntaxicView(@"A*=<C,a>;");
//@"A*=[a-c]e;",
//@"B*=[b-d]e;");
CreateLexicalView(@"Symbol *=\[|\]|\{|\}|\.|\+|\*|\?|\||\;|\=|\!|\\;");
CreateLexicalView(@"Terminal =[a-z]|[A-Z];",
@"NonAxiomRuleName={Terminal}+;",
@"AxiomRuleName={Terminal}+\*;",
@"RuleName*={NonAxiomRuleName}|{AxiomRuleName};");
CreateLexicalView("A*=ab{C}*;", "C=c;");
CreateLexicalView("A*=ab{B};", "B={C};", "C={D};", "D=c;");
CreateLexicalView("A*=a.c;", "B*=abc;");
CreateLexicalView(
@"A*=[a-c]e;",
@"B*=[b-d]e;");
CreateLexicalView(
@"L=[a-b]|[c-d];",
@"N={L}+;",
@"A={L}+\*;",
@"R*={N}|{A};");
CreateLexicalView("A*=a{S}a;", "S={S}b;", "S=c;");
CreateLexicalView("A=abc;", "B=def;", "E*={A}|{B};");
CreateLexicalView("A*=a{B}{C};", "B={C};", "C=b;");
CreateLexicalView("A*=a{BCD}e;", "BCD=b{C}d;", "C=c;");
CreateLexicalView("A*=a{B}c;", "B={C};", "C=b;");
CreateLexicalView("A*=a{B}d;", "B=bc?;");
CreateLexicalView("A*=a{S}a;", "S={S}b;", "S=c;");
CreateLexicalView("A*=abcde;");
CreateLexicalView("A*=a{S}a;", "S=st;");
CreateLexicalView("A*=a{B}a;", "B=b{A}b;"); //*/
}