| class A_QUEUE{T} < $QUEUE{T} |
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| **** | An array-based queue that expands using amortized doubling. |
| $QUEUE{_} | $DISPENSER{_} | $STR | $CONTAINER{_} | $ELT{_} | $ELT | COMPARE{_} |
| QUEUE{_} |
| copy: SAME |
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| create(a: $ELT{T}): SAME |
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| **** | Create from an ordered container of elements "a" Insert all the elements in "a" into the queue such that the last element of "a" will also be the last element of the queue |
| create: SAME |
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| create_capacity(allocate: INT): SAME |
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| **** | Create, allocating for "allocate" elements. Can grow later |
| create_from(a: ARRAY{T}): SAME |
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| **** | Create from elements of the array "a". Convenient to specify the queue using an array literal as argument |
| current: T |
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| elt_eq(e1,e2:ETP):BOOL .. Included as elt_eq |
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| **** | The "less than" relation used in the sorting routines. Compares the object "id" by default. May be redefined in descendants. |
| elt_hash(e:ETP):INT .. Included as elt_hash |
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| **** | A hash value associated with an element. Must have the property that if "elt_eq(e1,e2)" then "elt_hash(e1)=elt_hash(e2)". Can be defined to always return 0, but many routines will then become quadratic. Uses object "id" by default. May be redefined in descendants. |
| elt_lt(e1,e2:ETP):BOOL .. Included as elt_lt |
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| **** | The "less than" relation used in the sorting routines. Compares the object "id" by default. May be redefined in descendants. |
| elt_nil: ETP .. Included as elt_nil |
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| **** | Return the nil value. If the element is under $NIL then return e.nil. Otherwise, return void
_ |
| enq(e: T) |
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| **** | Enqueue the element "e" into the tail of the queue |
| has(el: T): BOOL |
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| is_elt_nil(e:ETP):BOOL .. Included as is_elt_nil |
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| is_empty: BOOL |
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| remove: T |
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| **** | Error if the queue is empty |
| size: INT |
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| **** | Return the number of elements in the queue |
| str: STR |
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| top: T |
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| **** | Return the top most elemetn of the queue |
| elt!: T |
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| **** | Return the elements in the queue in their normal order without changing the queue. Starts with the head of the queue and works downward |
| attr buf: ARRAY{T}; |
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| **** |
| attr buf: ARRAY{T}; |
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| **** |
| build(sz: INT): SAME |
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| attr head: INT; |
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| **** | Index of head |
| attr head: INT; |
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| **** | Index of head |
| attr tail: INT; |
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| **** | Index of next insert |
| attr tail: INT; |
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| **** | Index of next insert |