public override IDensity <FieldType <int, PType>, int, PType> VisitVariable(DensityExpressionGrammarParser.VariableContext ctx)
{
var variableStr = ctx.VARIABLE().GetText();
if (_variableMatch.IsMatch(variableStr))
{
var match = _variableMatch.Match(variableStr);
var matchDict = Enumerable.Range(0, match.Groups.Count)
.Where(i => !match.Groups[i].Name.All(char.IsDigit))
.ToDictionary(
i => match.Groups[i].Name,
i => match.Groups[i].Value);
var hasPrefixNum = !string.IsNullOrEmpty(matchDict["prefixNumMatch"]);
var prefixNum = matchDict["prefixNum"];
var nPrefixNum = matchDict["nPrefixNum"];
var prefix = matchDict["prefix"];
var baseType = matchDict["baseType"];
var nStr = matchDict["n"];
var postfix = matchDict["postfix"];
var hasPrefix = hasPrefixNum || !string.IsNullOrEmpty(prefix);
var hasPostFix = !string.IsNullOrEmpty(postfix);
if (hasPostFix)
{
throw new NotImplementedException();
}
if (baseType != "d")
{
throw new NotImplementedException();
}
var n = int.Parse(nStr);
var baseDensity = new Die(n);
if (hasPrefix)
{
var prefixType = hasPrefixNum ? prefixNum : prefix;
var nPrefix = hasPrefixNum ? int.Parse(nPrefixNum) : 1;
if (prefixType == "a")
{
return(baseDensity.WithAdvantage(nPrefix));
}
if (prefixType == "d")
{
return(baseDensity.WithDisadvantage(nPrefix));
}
throw new NotImplementedException();
}
else
{
return(baseDensity);
}
}
else
{
throw new NotImplementedException();
}
}
abstract public IDensity <G, M, RF> VisitVariable(DensityExpressionGrammarParser.VariableContext ctx);
/// <summary>
/// Exit a parse tree produced by <see cref="DensityExpressionGrammarParser.variable"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitVariable([NotNull] DensityExpressionGrammarParser.VariableContext context)
{
}
