package coq

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package coq
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Extending streams with a (non-canonical) location function

type 'a t
val from : ?loc:Loc.t -> (int -> ('a * Loc.t) option) -> 'a t
val current_loc : 'a t -> Loc.t

Returning the loc of the last consumed element or the initial loc if no element is consumed

val max_peek_loc : 'a t -> Loc.t

Returning the loc of the max visited element or the initial loc if no element is consumed

val interval_loc : int -> int -> 'a t -> Loc.t

Returning the loc starting after element bp (counting from 0) and spanning up to already peeked element at position ep, under the assumption that bp <= ep; returns an empty interval if bp = ep; returns the empty initial interval if additionally bp = 0; fails if the elements have not been peeked yet

val get_loc : int -> 'a t -> Loc.t

Return location of an already peeked element at some position counting from 0; fails if the element has not been peeked yet

Lifted usual function on streams

val count : 'a t -> int
val peek : 'a t -> 'a option
val npeek : int -> 'a t -> 'a list
val junk : 'a t -> unit

consumes the next element if there is one

val next : 'a t -> 'a

next strm returns and consumes the next element; raise Stream.Failure if the stream is empty

Other functions

val peek_nth : int -> 'a t -> 'a

peek_nth n strm returns the nth element counting from 0 without consuming the stream; raises Stream.Failure if not enough elements

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