Summary

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	File:     indices.icn

	Subject:  Procedure to produce indices

	Author:   Ralph E. Griswold

	Date:     June 2, 1998

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   This file is in the public domain.

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	indices(spec, last)
			produces a list of the integers given by the
			specification spec, which is a common separated list
			of either positive integers or integer spans, as in

				"1,3-10, ..."

			If last is specified, it it used for a span of
			the form "10-".

			In an integer span, the low and high values need not
			be in order.  For example, "1-10" and "10-1"
			are equivalent.  Similarly, indices need not be
			in order, as in "3-10, 1, ..."

			And empty value, as in "10,,12" is ignored.

			indices() fails if the specification is syntactically
			erroneous or if it contains a value less than 1.

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This file is part of the (main) package.

indices(spec, last)

: generate indices