| 115 | } |
| 116 | |
| 117 | fn main() { |
| 118 | basic(); |
| 119 | iter(); |
| 120 | |
| 121 | fn basic() { |
| 122 | let mut q = Queue::new(4); |
| 123 | let _r1 = q.enqueue(1); let _r2 = q.enqueue(2); |
| 124 | let _r3 = q.enqueue(3); let _r4 = q.enqueue(4); |
| 125 | if let Err(error) = q.enqueue(5) { |
| 126 | println!("Enqueue error: {error}"); |
| 127 | } |
| 128 | |
| 129 | if let Some(data) = q.dequeue() { |
| 130 | println!("dequeue data: {data}"); |
| 131 | } else { |
| 132 | println!("empty queue"); |
| 133 | } |
| 134 | |
| 135 | println!("empty: {}, len: {}", q.is_empty(), q.len()); |
| 136 | println!("full: {}, {:?}", q.is_full(), q); |
| 137 | |
| 138 | q.clear(); |
| 139 | println!("{:?}", q); |
| 140 | } |
| 141 | |
| 142 | fn iter() { |
| 143 | let mut q = Queue::new(4); |
| 144 | let _r1 = q.enqueue(1); let _r2 = q.enqueue(2); |
| 145 | let _r3 = q.enqueue(3); let _r4 = q.enqueue(4); |
| 146 | |
| 147 | let sum1 = q.iter().sum::<i32>(); |
| 148 | let mut addend = 0; |
| 149 | for item in q.iter_mut() { |
| 150 | *item += 1; |
| 151 | addend += 1; |
| 152 | } |
| 153 | let sum2 = q.iter().sum::<i32>(); |
| 154 | println!("{sum1} + {addend} = {sum2}"); |
| 155 | |
| 156 | assert_eq!(14, q.into_iter().sum::<i32>()); |
| 157 | } |
| 158 | } |