mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
90 lines
2.4 KiB
Ruby
90 lines
2.4 KiB
Ruby
class Module
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##
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# call-seq:
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# mod < other -> true, false, or nil
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#
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# Returns true if `mod` is a subclass of `other`. Returns
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# <code>nil</code> if there's no relationship between the two.
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# (Think of the relationship in terms of the class definition:
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# "class A < B" implies "A < B".)
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#
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def <(other)
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if self.equal?(other)
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false
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else
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self <= other
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end
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end
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##
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# call-seq:
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# mod <= other -> true, false, or nil
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#
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# Returns true if `mod` is a subclass of `other` or
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# is the same as `other`. Returns
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# <code>nil</code> if there's no relationship between the two.
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# (Think of the relationship in terms of the class definition:
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# "class A < B" implies "A < B".)
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def <=(other)
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raise TypeError, 'compared with non class/module' unless other.is_a?(Module)
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if self.ancestors.include?(other)
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return true
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elsif other.ancestors.include?(self)
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return false
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end
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end
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##
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# call-seq:
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# mod > other -> true, false, or nil
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#
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# Returns true if `mod` is an ancestor of `other`. Returns
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# <code>nil</code> if there's no relationship between the two.
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# (Think of the relationship in terms of the class definition:
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# "class A < B" implies "B > A".)
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#
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def >(other)
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if self.equal?(other)
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false
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else
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self >= other
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end
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end
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##
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# call-seq:
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# mod >= other -> true, false, or nil
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#
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# Returns true if `mod` is an ancestor of `other`, or the
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# two modules are the same. Returns
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# <code>nil</code> if there's no relationship between the two.
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# (Think of the relationship in terms of the class definition:
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# "class A < B" implies "B > A".)
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#
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def >=(other)
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raise TypeError, 'compared with non class/module' unless other.is_a?(Module)
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return other < self
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end
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##
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# call-seq:
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# module <=> other_module -> -1, 0, +1, or nil
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#
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# Comparison---Returns -1, 0, +1 or nil depending on whether `module`
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# includes `other_module`, they are the same, or if `module` is included by
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# `other_module`.
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#
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# Returns `nil` if `module` has no relationship with `other_module`, if
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# `other_module` is not a module, or if the two values are incomparable.
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#
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def <=>(other)
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return 0 if self.equal?(other)
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return nil unless other.is_a?(Module)
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cmp = self < other
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return -1 if cmp
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return 1 unless cmp.nil?
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return nil
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end
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end
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