5292899c9a
Updated Instiki to Rails 2.1 RC1 (aka 2.0.991).
76 lines
2 KiB
Ruby
76 lines
2 KiB
Ruby
class Module
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# Returns the module which contains this one according to its name.
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#
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# module M
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# module N
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# end
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# end
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# X = M::N
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#
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# p M::N.parent # => M
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# p X.parent # => M
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#
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# The parent of top-level and anonymous modules is Object.
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#
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# p M.parent # => Object
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# p Module.new.parent # => Object
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#
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def parent
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parent_name = name.split('::')[0..-2] * '::'
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parent_name.empty? ? Object : parent_name.constantize
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end
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# Returns all the parents of this module according to its name, ordered from
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# nested outwards. The receiver is not contained within the result.
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#
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# module M
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# module N
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# end
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# end
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# X = M::N
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#
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# p M.parents # => [Object]
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# p M::N.parents # => [M, Object]
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# p X.parents # => [M, Object]
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#
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def parents
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parents = []
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parts = name.split('::')[0..-2]
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until parts.empty?
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parents << (parts * '::').constantize
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parts.pop
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end
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parents << Object unless parents.include? Object
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parents
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end
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if RUBY_VERSION < '1.9'
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# Returns the constants that have been defined locally by this object and
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# not in an ancestor. This method is exact if running under Ruby 1.9. In
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# previous versions it may miss some constants if their definition in some
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# ancestor is identical to their definition in the receiver.
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def local_constants
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inherited = {}
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ancestors.each do |anc|
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next if anc == self
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anc.constants.each { |const| inherited[const] = anc.const_get(const) }
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end
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constants.select do |const|
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!inherited.key?(const) || inherited[const].object_id != const_get(const).object_id
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end
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end
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else
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def local_constants #:nodoc:
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constants(false)
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end
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end
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# Returns the names of the constants defined locally rather than the
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# constants themselves. See <tt>local_constants</tt>.
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def local_constant_names
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local_constants.map(&:to_s)
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end
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end
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