private static RTree ParseStdGroup(RevgexStringReader inp, GroupSet groups)
{
string name = null;
var id = -1;
if (inp.Peek() == ':')
{
name = ParseGroupName(inp);
}
if (name != null)
{
if (!groups.Add(name))
{
throw Error(inp, $"Group name {name} is already used.");
}
}
else
{
groups.Add(id = groups.GetNextId());
}
var body = ParseGroupBody(inp, groups);
if (name != null)
{
groups.Specify(name, new RGroup(body));
return(new RNamedGroupRef(name, LookupQuantifier(inp)));
}
else
{
groups.Specify(id, new RGroup(body));
return(new RGroupRef(id, LookupQuantifier(inp)));
}
}
private static GroupSet Parse(RevgexStringReader inp, bool allowPredefinedGroups)
{
var groups = new GroupSet();
if (allowPredefinedGroups)
{
groups.Add(":maleName", PredefinedGroups.MaleName);
groups.Add(":femaleName", PredefinedGroups.FemaleName);
groups.Add(":surname", PredefinedGroups.Surname);
groups.Add(":byte", PredefinedGroups.Byte);
groups.Add(":int", PredefinedGroups.Int);
groups.Add(":uint", PredefinedGroups.UnsignedInt);
groups.Add(":usPhone", PredefinedGroups.USPhone);
groups.Add(":mailSuffix", PredefinedGroups.MailSuffix);
groups.Add(":passwd", PredefinedGroups.Password);
}
groups.Add(0);
var alternatives = new List <List <RTree> > {
new List <RTree>()
};
while (inp.Peek() >= 0)
{
if (inp.Peek() == '|')
{
inp.Read();
alternatives.Add(new List <RTree>());
}
else
{
alternatives[alternatives.Count - 1].Add(ParseSingleSubtree(inp, groups));
}
}
groups.Specify(0,
alternatives.Count == 1
? new RGroup(alternatives[0].ToArray())
: new RGroup(new RAlternation(alternatives.Select(a => new RGroup(a.ToArray())).ToArray())));
return(groups);
}
