public void explicitly_casting_a_parser_to_a_BNF_wraps_that_parser()
{
Parser parser = new LiteralCharacter(';');
var subject = (BNF)parser;
var result = subject.Result();
Assert.That(result, Is.InstanceOf<LiteralCharacter>());
}
public void casting_a_parser_to_a_BNF_wraps_that_parser()
{
Parser parser = new LiteralCharacter('?');
BNF subject = parser; //must be class, can't cast interfaces :-(
var result = subject.Result();
Assert.That(result, Is.InstanceOf<LiteralCharacter>());
}
public void a_recursive_parser_pattern()
{
// Build a parser for patterns of nested square brackets
subject = Recursion.Over(recursive =>
{
var left = new LiteralCharacter('[');
var right = new LiteralCharacter(']');
var mrec = new Repetition(recursive, 0, int.MaxValue);
var lrec = new Sequence(left, mrec);
var lr = new Sequence(lrec, right);
return lr;
});
valid_recursive = new ScanStrings("[[[][]]]");
valid_simple = new ScanStrings("[]");
invalid_recursive = new ScanStrings("[[[][[[]]]"); // unbalanced
invalid_simple = new ScanStrings("hello, world");
}
public void semicolon_delimited_list()
{
alpha = new RegularExpression("[a-zA-Z]+");
semi = new LiteralCharacter(';');
subject = new DelimitedList(alpha, semi);
}