void OptimizeSingleItemParsers(IEnumerable <Parser> children)
{
var sequences = from r in children.OfType <SequenceParser>()
where
r.Items.Count == 1 &&
r.GetType() == typeof(SequenceParser)
select r;
var alternations = from r in children.OfType <AlternativeParser>()
where
r.Items.Count == 1 &&
r.GetType() == typeof(AlternativeParser)
select r;
var parsers = sequences.Cast <ListParser>().Union(alternations.Cast <ListParser>()).ToList();
foreach (var parser in parsers)
{
var replacement = parser.Items[0];
if (parser.Name != null)
{
replacement = new UnaryParser {
Inner = replacement, Name = parser.Name
};
}
Replace(new ParserReplaceArgs(parser, replacement));
}
}
public static Parser Named(this Parser parser, string name)
{
var unary = new UnaryParser(parser);
unary.Name = name ?? Guid.NewGuid().ToString();
return(unary);
}
void OptimizeSingleItemParsers()
{
var parsers = from r in Children.OfType <ListParser>()
where
r.Items.Count == 1 &&
(r is SequenceParser || r is AlternativeParser)
select r;
foreach (var parser in parsers.ToList())
{
var replacement = parser.Items[0];
if (parser.Name != null)
{
replacement = new UnaryParser {
Inner = replacement, Name = parser.Name
};
}
Replace(new ParserReplaceArgs(parser, replacement));
}
}
protected UnaryParser(UnaryParser other, ParserCloneArgs args)
: base(other, args)
{
Inner = args.Clone(other.Inner);
}
void OptimizeSingleItemParsers(IEnumerable<Parser> children)
{
var sequences = from r in children.OfType<SequenceParser>()
where
r.Items.Count == 1
&& r.GetType() == typeof(SequenceParser)
select r;
var alternations = from r in children.OfType<AlternativeParser>()
where
r.Items.Count == 1
&& r.GetType() == typeof(AlternativeParser)
select r;
var parsers = sequences.Cast<ListParser>().Union(alternations.Cast<ListParser>()).ToList();
foreach (var parser in parsers)
{
var replacement = parser.Items[0];
if (parser.Name != null)
{
replacement = new UnaryParser { Inner = replacement, Name = parser.Name };
}
Replace(new ParserReplaceArgs(parser, replacement));
}
}
protected UnaryParser(UnaryParser other, ParserCloneArgs args)
: base(other, args)
{
Inner = args.Clone(other.Inner);
}
