93 lines
1.2 KiB
Ruby
93 lines
1.2 KiB
Ruby
#--
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#
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#
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#
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# Copyright (c) 1999-2006 Minero Aoki
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#
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# This program is free software.
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# You can distribute/modify this program under the same terms of ruby.
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# see the file "COPYING".
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#
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#++
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module Racc
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# An "indexed" set. All items must respond to :ident.
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class ISet
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def initialize(a = [])
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@set = a
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end
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attr_reader :set
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def add(i)
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@set[i.ident] = i
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end
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def [](key)
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@set[key.ident]
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end
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def []=(key, val)
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@set[key.ident] = val
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end
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alias include? []
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alias key? []
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def update(other)
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s = @set
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o = other.set
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o.each_index do |idx|
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if t = o[idx]
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s[idx] = t
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end
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end
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end
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def update_a(a)
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s = @set
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a.each {|i| s[i.ident] = i }
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end
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def delete(key)
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i = @set[key.ident]
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@set[key.ident] = nil
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i
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end
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def each(&block)
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@set.compact.each(&block)
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end
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def to_a
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@set.compact
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end
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def to_s
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"[#{@set.compact.join(' ')}]"
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end
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alias inspect to_s
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def size
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@set.nitems
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end
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def empty?
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@set.nitems == 0
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end
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def clear
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@set.clear
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end
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def dup
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ISet.new(@set.dup)
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end
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end # class ISet
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end # module Racc
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