29 lines
913 B
Factor
29 lines
913 B
Factor
! Copyright (C) 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: kernel-internals
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USING: generic kernel lists math-internals sequences vectors ;
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! An array is a range of memory storing pointers to other
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! objects. Arrays are not used directly, and their access words
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! are not bounds checked. Examples of abstractions built on
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! arrays include vectors, hashtables, and tuples.
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! These words are unsafe. I'd say "do not call them", but that
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! Java-esque. By all means, do use arrays if you need something
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! low-level... but be aware that vectors are usually a better
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! choice.
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BUILTIN: array 8 [ 1 "array-capacity" f ] ;
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: array-nth ( n array -- obj )
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#! Unsafe.
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swap 2 fixnum+ slot ; inline
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: set-array-nth ( obj n array -- )
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#! Unsafe.
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swap 2 fixnum+ set-slot ; inline
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M: array length array-capacity ;
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M: array nth array-nth ;
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M: array set-nth set-array-nth ;
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