private SyntaxVisitorResult <IN, OUT> Visit(OptionSyntaxNode <IN> node, object context = null)
{
var child = node.Children != null && node.Children.Any() ? node.Children[0] : null;
if (child == null || node.IsEmpty)
{
if (node.IsGroupOption)
{
return(SyntaxVisitorResult <IN, OUT> .NewOptionGroupNone());
}
else
{
return(SyntaxVisitorResult <IN, OUT> .NewOptionNone());
}
}
var innerResult = Visit(child, context);
if (child is SyntaxLeaf <IN> leaf)
{
return(SyntaxVisitorResult <IN, OUT> .NewToken(leaf.Token));
}
if (child is GroupSyntaxNode <IN> group)
{
return(SyntaxVisitorResult <IN, OUT> .NewOptionGroupSome(innerResult.GroupResult));
}
return(SyntaxVisitorResult <IN, OUT> .NewOptionSome(innerResult.ValueResult));
}
private SyntaxVisitorResult <IN, OUT> Visit(SyntaxLeaf <IN> leaf)
{
return(SyntaxVisitorResult <IN, OUT> .NewToken(leaf.Token));
}