зеркало из https://github.com/github/ruby.git
83 строки
1.3 KiB
Ruby
83 строки
1.3 KiB
Ruby
# frozen_string_literal: false
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##
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# The RequirementList is used to hold the requirements being considered
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# while resolving a set of gems.
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#
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# The RequirementList acts like a queue where the oldest items are removed
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# first.
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class Gem::Resolver::RequirementList
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include Enumerable
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##
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# Creates a new RequirementList.
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def initialize
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@exact = []
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@list = []
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end
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def initialize_copy other # :nodoc:
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@exact = @exact.dup
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@list = @list.dup
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end
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##
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# Adds Resolver::DependencyRequest +req+ to this requirements list.
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def add(req)
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if req.requirement.exact?
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@exact.push req
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else
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@list.push req
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end
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req
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end
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##
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# Enumerates requirements in the list
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def each # :nodoc:
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return enum_for __method__ unless block_given?
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@exact.each do |requirement|
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yield requirement
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end
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@list.each do |requirement|
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yield requirement
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end
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end
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##
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# How many elements are in the list
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def size
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@exact.size + @list.size
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end
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##
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# Is the list empty?
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def empty?
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@exact.empty? && @list.empty?
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end
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##
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# Remove the oldest DependencyRequest from the list.
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def remove
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return @exact.shift unless @exact.empty?
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@list.shift
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end
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##
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# Returns the oldest five entries from the list.
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def next5
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x = @exact[0,5]
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x + @list[0,5 - x.size]
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end
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end
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