alice
library
manual.
signature VECTOR_SLICE
structure VectorSlice : VECTOR_SLICE
An extended version of the Standard ML Basis' VectorSlice structure.
See also: Vector, VectorPair, ArraySlice, MONO_VECTOR_SLICE
Imported implicitly.
signature VECTOR_SLICE =
sig
type 'a slice
type 'a t = 'a slice
val full : 'a vector -> 'a slice
val slice : 'a vector * int * int option -> 'a slice
val subslice : 'a slice * int * int option -> 'a slice
val vector : 'a slice -> 'a vector
val toVector : 'a slice -> 'a vector
val toList : 'a slice -> 'a list
val length : 'a slice -> int
val isEmpty : 'a slice -> bool
val base : 'a slice -> 'a vector * int * int
val sub : 'a slice * int -> 'a
val getItem : 'a slice -> ('a * 'a slice) option
val triml : int -> 'a slice -> 'a slice
val trimr : int -> 'a slice -> 'a slice
val splitAt : 'a slice * int -> 'a slice * 'a slice
val splitl : ('a -> bool) -> 'a slice -> 'a slice * 'a slice
val splitr : ('a -> bool) -> 'a slice -> 'a slice * 'a slice
val dropl : ('a -> bool) -> 'a slice -> 'a slice
val dropr : ('a -> bool) -> 'a slice -> 'a slice
val takel : ('a -> bool) -> 'a slice -> 'a slice
val taker : ('a -> bool) -> 'a slice -> 'a slice
val concat : 'a slice list -> 'a vector
val rev : 'a slice -> 'a vector
val app : ('a -> unit) -> 'a slice -> unit
val appr : ('a -> unit) -> 'a slice -> unit
val map : ('a -> 'b) -> 'a slice -> 'b vector
val foldl : ('a * 'b -> 'b) -> 'b -> 'a slice -> 'b
val foldr : ('a * 'b -> 'b) -> 'b -> 'a slice -> 'b
val all : ('a -> bool) -> 'a slice -> bool
val exists : ('a -> bool) -> 'a slice -> bool
val find : ('a -> bool) -> 'a slice -> 'a option
val appi : (int * 'a -> unit) -> 'a slice -> unit
val appri : (int * 'a -> unit) -> 'a slice -> unit
val mapi : (int * 'a -> 'b) -> 'a slice -> 'b vector
val foldli : (int * 'a * 'b -> 'b) -> 'b -> 'a slice -> 'b
val foldri : (int * 'a * 'b -> 'b) -> 'b -> 'a slice -> 'b
val alli : (int * 'a -> bool) -> 'a slice -> bool
val existsi : (int * 'a -> bool) -> 'a slice -> bool
val findi : (int * 'a -> bool) -> 'a slice -> (int * 'a) option
val contains : ''a slice -> ''a -> bool
val notContains : ''a slice -> ''a -> bool
val equal : ('a * 'a -> bool) -> 'a slice * 'a slice -> bool
val collate : ('a * 'a -> order) -> 'a slice * 'a slice -> order
val isSorted : ('a * 'a -> order) -> 'a slice -> bool
val sort : ('a * 'a -> order) -> 'a slice -> 'a vector
end
Items not described here are as in the Standard ML Basis' VectorSlice structure.
A local synonym for type slice.
Creates a vector of the elements of sl. Equivalent to vector sl.
Creates a list of the elements of sl in order of increasing indices. Equivalent to Vector.toList (toVector sl).
Returns a vector that contains the elements of sl in reverse order. Equivalent to Vector.rev (toVector sl).
These functions remove k elements from the left (respectively, right) of the slice sl. If k is greater than the size of the slice, an empty slice is returned. Specifically, for a slice sl = slice(vec,i,j) and k ≤ j, we have:
triml k sl = slice(vec, i+k, j-k)
trimr k sl = slice(vec, i, j-k)
The exception Subscript is raised if k < 0. This exception is raised when triml k or trimr k is evaluated.
Returns the pair of slices (sl1, sl2), where sl1 contains the first i characters of sl and sl2 contains the rest, assuming 0 ≤ i ≤ size sl. Otherwise, it raises Subscript.
These functions scan sl from left to right (respectively, right to left) looking for the first element that does not satisfy the predicate f. They return the pair (sl1, sl2) giving the split of the slice into the span up to that element and the rest. The slice sl1 is the left side of the split, sl2the right side.
These routines scan the slice sl for the first element not satisfying the predicate f. The functions dropl and takel scan left to right (i.e., increasing indices), while dropr and taker scan from the right. The drop functions drop the maximal subslice consisting of elements satisfying the predicate, while the take functions return the maximal such subslice. These can be defined in terms of the split operations:
takel f sl = #1(splitl f sl)
dropl f sl = #2(splitl f sl)
taker f sl = #2(splitr f sl)
dropr f sl = #1(splitr f sl)
Like app and appi, but apply f in right to left order (i.e., decreasing indices). The expression appr f sl is equivalent to:
appri (f o #2) sl
Indexed versions of the functions all and exists. The index of each element is passed to f as an additional argument. The following equivalences hold:
all f sl = alli (f o #2) sl
exists f sl = existsi (f o #2) sl
Returns true if the element a occurs in the slice sl; otherwise false.
Returns true if the element a does not occur in the slice sl; otherwise false. Equivalent to not(contains sl a).
Creates an equality function on slices given an equality on the element type.
Returns true iff the elements in sl are sorted with respect to the ordering function f.
Returns a vector that contains the same elements as sl, but sorted with respect to the ordering function f. Sorting may be unstable with respect to equal elements.