1Queue(3) OCaml library Queue(3)
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6 Queue - First-in first-out queues.
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9 Module Queue
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12 Module Queue
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16 First-in first-out queues.
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18 This module implements queues (FIFOs), with in-place modification.
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25 type 'a t
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28 The type of queues containing elements of type 'a .
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33 exception Empty
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36 Raised when Queue.take or Queue.peek is applied to an empty queue.
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41 val create : unit -> 'a t
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43 Return a new queue, initially empty.
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48 val add : 'a -> 'a t -> unit
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51 add x q adds the element x at the end of the queue q .
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56 val push : 'a -> 'a t -> unit
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59 push is a synonym for add .
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64 val take : 'a t -> 'a
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67 take q removes and returns the first element in queue q , or raises
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73 val pop : 'a t -> 'a
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76 pop is a synonym for take .
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81 val peek : 'a t -> 'a
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84 peek q returns the first element in queue q , without removing it from
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90 val top : 'a t -> 'a
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93 top is a synonym for peek .
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98 val clear : 'a t -> unit
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100 Discard all elements from a queue.
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105 val copy : 'a t -> 'a t
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107 Return a copy of the given queue.
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112 val is_empty : 'a t -> bool
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114 Return true if the given queue is empty, false otherwise.
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119 val length : 'a t -> int
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121 Return the number of elements in a queue.
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126 val iter : ('a -> unit) -> 'a t -> unit
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129 iter f q applies f in turn to all elements of q , from the least
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136 val fold : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a
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139 fold f accu q is equivalent to List.fold_left f accu l , where l is the
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145 val transfer : 'a t -> 'a t -> unit
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148 transfer q1 q2 adds all of q1 's elements at the end of the queue q2 ,
149 then clears q1 . It is equivalent to the sequence iter (fun x -> add x
150 q2) q1; clear q1 , but runs in constant time.
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157OCamldoc 2010-01-29 Queue(3)