public PatternUst VisitPatternLiterals([NotNull] DslParser.PatternLiteralsContext context)
{
IEnumerable <PatternUst> values = context.patternNotLiteral()
.Select(literal => VisitPatternNotLiteral(literal));
var patternOr = values.Count() > 1
? new PatternOr(values)
: values.Count() == 1
? values.First()
: new PatternIdRegexToken();
PatternUst result;
if (context.PatternVar() != null)
{
string id = context.PatternVar().GetText().Substring(1);
if (values.Count() > 0 && patternVars.TryGetValue(id, out PatternVar existedPatternVar))
{
LineColumnTextSpan lcTextSpan = Data.GetLineColumnTextSpan(existedPatternVar.TextSpan);
throw new ConversionException(
Data,
message: $"DSL Error: PatternVar {id} with the same Id already defined earlier at {lcTextSpan}")
{
TextSpan = context.PatternVar().GetTextSpan()
};
}
var patternVar = new PatternVar(id, context.GetTextSpan());
patternVars[id] = patternVar;
patternVar.Value = patternOr;
result = patternVar;
}
else
{
result = patternOr;
}
return(result);
}
public virtual T Visit(PatternVar patternVar)
{
return(VisitChildren(patternVar));
}