Class: Lookout::Diff::Operations::Copy

Inherits:
Lookout::Diff::Operation show all
Defined in:
lib/lookout-3.0/diff/operations/copy.rb

Overview

Slice that should be copied from the old sequence.

Instance Method Summary collapse

Methods inherited from Lookout::Diff::Operation

#apply

Instance Method Details

#<<(context) ⇒ Object

Note:

Logically, the receiver should be #foldable? inside CONTEXT, but this isn’t enforced.

Folds from the end of the receiver, leaving CONTEXT elements.



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# File 'lib/lookout-3.0/diff/operations/copy.rb', line 18

def <<(context)
  self.class.new(old.end_at([old.end, old.begin + context - 1].min),
                 new.end_at([new.end, new.begin + context - 1].min))
end

#>>(context) ⇒ Object

Note:

Logically, the receiver should be #foldable? inside CONTEXT, but this isn’t enforced.

Folds from the beginning of the receiver, leaving CONTEXT elements.



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# File 'lib/lookout-3.0/diff/operations/copy.rb', line 12

def >>(context)
  self.class.new(old.begin_at([old.begin, old.end - context + 1].max),
                 new.begin_at([new.begin, new.end - context + 1].max))
end

#foldable?(context) ⇒ Boolean 



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# File 'lib/lookout-3.0/diff/operations/copy.rb', line 9

def foldable?(context) old.size > context * 2 end

#parity? ⇒ Boolean 



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# File 'lib/lookout-3.0/diff/operations/copy.rb', line 24

def parity?; old == new end