public void DFA_triggers_actions_correctly()
{
// Given alphabet
const int A = 0;
const int B = 1;
// Given actions
const int Action0 = 1001;
const int Action1 = 1002;
const int Action2 = 1003;
GivenRegularExpression(
AstNode.Or(
AstNode.Cat(
CharSetNode.Create(A), // 0
ActionNode.Create(Action0)), // 1
AstNode.Cat( //
CharSetNode.Create(A), // 2
CharSetNode.Create(B), // 3
CharSetNode.Create(B), // 4
ActionNode.Create(Action1) // 5
),
AstNode.Cat(
RepeatNode.ZeroOrMore(CharSetNode.Create(A)), // 6
RepeatNode.OneOrMore(CharSetNode.Create(B)), // 7, 8
ActionNode.Create(Action2)) // 9
));
CreateDfa();
DfaShouldTriggerAction(Action0, A);
DfaShouldTriggerAction(Action1, A, B, B);
DfaShouldTriggerAction(Action2, A, B);
DfaShouldTriggerAction(Action2, A, B, B, B);
}
public void dfa_provides_correct_serialization_information()
{
// Given alphabet
const int A = 0;
const int B = 1;
// Given actions
const int Action0 = 1001;
const int Action1 = 1002;
const int Action2 = 1003;
GivenRegularExpression(
AstNode.Or(
AstNode.Cat(
CharSetNode.Create(A),
ActionNode.Create(Action0)),
AstNode.Cat(
CharSetNode.Create(A),
CharSetNode.Create(B),
CharSetNode.Create(B),
ActionNode.Create(Action1)
),
AstNode.Cat(
RepeatNode.ZeroOrMore(CharSetNode.Create(A)),
RepeatNode.OneOrMore(CharSetNode.Create(B)),
ActionNode.Create(Action2))
));
CreateDfa();
var output = new StringBuilder();
serialization.Print(output);
// DUBUG: Console.WriteLine(output);
}
public Piece Literal(QStr str)
{
var nodes = str.Text.Select(ch => CharSetNode.Create(IntSet.Of(ch)));
return(new Piece
{
Node = AstNode.Cat(nodes)
});
}
public Piece Piece(IntSet charClass)
{
if (charClass.IsEmpty)
{
return(new Piece {
Node = OrNode.Or()
});
}
return(new Piece {
Node = CharSetNode.Create(charClass)
});
}
public void DFA_matches_input_correctly()
{
// Given alphabet
const int A = 0;
const int B = 1;
GivenRegularExpression(
new CatNode(new List <AstNode> {
RepeatNode.ZeroOrMore(
new OrNode(new List <AstNode> {
CharSetNode.Create(A),
CharSetNode.Create(B)
})),
CharSetNode.Create(A),
CharSetNode.Create(B),
CharSetNode.Create(B)
})
);
CreateDfa();
DfaShouldMatch(A, B, B);
DfaShouldMatch(A, A, A, A, B, B);
DfaShouldMatch(B, B, B, A, B, B);
DfaShouldMatch(A, B, B, A, B, B);
DfaShouldNotMatch();
DfaShouldNotMatch(A, B);
DfaShouldNotMatch(A, B, B, A);
DfaShouldNotMatch(A, B, B, B);
DfaShouldMatchBeginning(A, B, B);
DfaShouldMatchBeginning(A, A, A, A, B, B);
DfaShouldMatchBeginning(B, B, B, A, B, B);
DfaShouldMatchBeginning(A, B, B, A, B, B);
DfaShouldMatchBeginning(A, B, B, A);
DfaShouldMatchBeginning(A, B, B, B);
DfaShouldNotMatchBeginning();
DfaShouldNotMatchBeginning(A, B, A, B);
DfaShouldNotMatchBeginning(A, A, A, A);
DfaShouldNotMatchBeginning(B, B, B, B);
}
public void input_equivalence_classes_are_used()
{
// Given alphabet
int A = 0;
int B = 0x10FFFF; // Unicode max
GivenRegularExpression(
new CatNode(new List <AstNode> {
RepeatNode.ZeroOrMore(CharSetNode.CreateRange(A, B)),
CharSetNode.Create(A),
CharSetNode.Create(B),
CharSetNode.Create(B)
})
);
CreateDfa();
DfaShouldMatch(A, B, B);
DfaShouldMatch(A, A, A, A, B, B);
DfaShouldMatch(B, B, B, A, B, B);
DfaShouldMatch(A, B, B, A, B, B);
DfaShouldNotMatch();
DfaShouldNotMatch(A, B);
DfaShouldNotMatch(A, B, B, A);
DfaShouldNotMatch(A, B, B, B);
DfaShouldMatchBeginning(A, B, B);
DfaShouldMatchBeginning(A, A, A, A, B, B);
DfaShouldMatchBeginning(B, B, B, A, B, B);
DfaShouldMatchBeginning(A, B, B, A, B, B);
DfaShouldMatchBeginning(A, B, B, A);
DfaShouldMatchBeginning(A, B, B, B);
DfaShouldNotMatchBeginning();
DfaShouldNotMatchBeginning(A, B, A, B);
DfaShouldNotMatchBeginning(A, A, A, A);
DfaShouldNotMatchBeginning(B, B, B, B);
}
public RegularTree(AstNode root)
{
this.EoiCharSetNode = CharSetNode.Create(EoiChar);
this.AugmentedRoot = new CatNode(new List <AstNode> {
root, EoiCharSetNode
});
var positionBuilder = new PositionBuilder();
AugmentedRoot.Accept(positionBuilder, null);
Positions = positionBuilder.Positions;
EoiPosition = Positions.FindIndex(pos => pos.Characters.Contains(EoiChar));
Debug.Assert(EoiPosition >= 0);
var firstPosVisitor = new FirstPosGetter();
this.FirstPos = AugmentedRoot.Accept(firstPosVisitor, 0);
var followPosBuilder = new FollowPosBuilder(Positions);
AugmentedRoot.Accept(followPosBuilder, 0);
}
public SreExpr LiteralMatch(QStr str)
{
return(new SreExpr {
Node = new CatNode(str.Text.Select(ch => CharSetNode.Create(ch)))
});
}
private CSetSreExpr CSet(IntSet cset)
{
return(new CSetSreExpr {
Node = CharSetNode.Create(cset)
});
}