Method compare_eq

external/pugixml/pugixml.cpp:6791–6877

		xpath_ast_node& operator=(const xpath_ast_node&);

		template <class Comp> static bool compare_eq(xpath_ast_node* lhs, xpath_ast_node* rhs, const xpath_context& c, const xpath_stack& stack, const Comp& comp)
		{
			xpath_value_type lt = lhs->rettype(), rt = rhs->rettype();

			if (lt != xpath_type_node_set && rt != xpath_type_node_set)
			{
				if (lt == xpath_type_boolean || rt == xpath_type_boolean)
					return comp(lhs->eval_boolean(c, stack), rhs->eval_boolean(c, stack));
				else if (lt == xpath_type_number || rt == xpath_type_number)
					return comp(lhs->eval_number(c, stack), rhs->eval_number(c, stack));
				else if (lt == xpath_type_string || rt == xpath_type_string)
				{
					xpath_allocator_capture cr(stack.result);

					xpath_string ls = lhs->eval_string(c, stack);
					xpath_string rs = rhs->eval_string(c, stack);

					return comp(ls, rs);
				}
			}
			else if (lt == xpath_type_node_set && rt == xpath_type_node_set)
			{
				xpath_allocator_capture cr(stack.result);

				xpath_node_set_raw ls = lhs->eval_node_set(c, stack);
				xpath_node_set_raw rs = rhs->eval_node_set(c, stack);

				for (const xpath_node* li = ls.begin(); li != ls.end(); ++li)
					for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri)
					{
						xpath_allocator_capture cri(stack.result);

						if (comp(string_value(*li, stack.result), string_value(*ri, stack.result)))
							return true;
					}

				return false;
			}
			else
			{
				if (lt == xpath_type_node_set)
				{
					swap(lhs, rhs);
					swap(lt, rt);
				}

				if (lt == xpath_type_boolean)
					return comp(lhs->eval_boolean(c, stack), rhs->eval_boolean(c, stack));
				else if (lt == xpath_type_number)
				{
					xpath_allocator_capture cr(stack.result);

					double l = lhs->eval_number(c, stack);
					xpath_node_set_raw rs = rhs->eval_node_set(c, stack);

					for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri)
					{
						xpath_allocator_capture cri(stack.result);