Function string_value

external/pugixml/pugixml.cpp:5412–5460

	}

	xpath_string string_value(const xpath_node& na, xpath_allocator* alloc)
	{
		if (na.attribute())
			return xpath_string_const(na.attribute().value());
		else
		{
			const xml_node& n = na.node();

			switch (n.type())
			{
			case node_pcdata:
			case node_cdata:
			case node_comment:
			case node_pi:
				return xpath_string_const(n.value());
			
			case node_document:
			case node_element:
			{
				xpath_string result;

				xml_node cur = n.first_child();
				
				while (cur && cur != n)
				{
					if (cur.type() == node_pcdata || cur.type() == node_cdata)
						result.append(xpath_string_const(cur.value()), alloc);

					if (cur.first_child())
						cur = cur.first_child();
					else if (cur.next_sibling())
						cur = cur.next_sibling();
					else
					{
						while (!cur.next_sibling() && cur != n)
							cur = cur.parent();

						if (cur != n) cur = cur.next_sibling();
					}
				}
				
				return result;
			}
			
			default:
				return xpath_string();
			}
		}
	}
	
	unsigned int node_height(xml_node n)
	{