public void CompositeVisitor_CapturingGroup_SandBoxTest_PriorityChoice3()
{
var prefix = new PrioritizedChoice(
new CapturingGroup("AndPredicate", new Literal {
MatchText = "&"
}),
new CapturingGroup("NotPredicate", new Literal {
MatchText = "!"
})
);
PrioritizedChoice suffix = new PrioritizedChoice(
new CapturingGroup("ZeroOrMore", new Literal {
MatchText = "*"
}),
new CapturingGroup("OneOrMore", new Literal {
MatchText = "+"
})
)
.Or(new CapturingGroup("Optional", new Literal {
MatchText = "?"
}));
var terminal = new CapturingGroup("AnyCharacter", new Literal {
MatchText = "."
});
var expression = new CapturingGroup("Expression",
new PrioritizedChoice(
// match prefixes first
prefix.Plus()
.Sequence(terminal)
,
// match suffixes next
terminal
.Sequence(
suffix.Plus()
)
)
.Or(terminal)
.Plus()
);
var input = ".";
var bytes = Encoding.UTF8.GetBytes(input);
var iterator = new ByteInputIterator(bytes);
var visitor = new NpegParserVisitor(iterator);
expression.Accept(visitor);
Assert.IsTrue(visitor.IsMatch);
AstNode node = visitor.AST;
Assert.IsTrue(node.Children.Count == 1);
Assert.IsTrue(node.Token.Name == "Expression");
Assert.IsTrue(node.Token.ValueAsString(iterator) == ".");
Assert.IsTrue(node.Children[0].Token.Name == "AnyCharacter");
}
