internal bool CanInline()
{
var nodes = Block.Nodes;
var isInline = YCombinator.Y <Node, bool>(self =>
node =>
{
var block = node as Block;
if (block != null)
{
return(block.Nodes.All(self));
}
var text = node as Text;
var tag = node as Tag;
return(text != null || (tag != null && tag.IsInline));
});
// Empty tag
if (!nodes.Any())
{
return(true);
}
// Text-only or inline-only tag
if (1 == nodes.Count)
{
return(isInline(nodes.First()));
}
// Multi-line inline-only tag
if (Block.Nodes.All(isInline))
{
for (int i = 1, len = nodes.Count; i < len; ++i)
{
if (nodes[i - 1] as Text != null && nodes[i] as Text != null)
{
return(false);
}
}
return(true);
}
// Mixed tag
return(false);
}
public static NumeralWrapper Factorial(this NumeralWrapper numeral) => YCombinator <NumeralWrapper, NumeralWrapper> .Y(Factorial)(numeral);