27 lines
		
	
	
		
			461 B
		
	
	
	
		
			Ruby
		
	
	
	
			
		
		
	
	
			27 lines
		
	
	
		
			461 B
		
	
	
	
		
			Ruby
		
	
	
	
# frozen_string_literal: true
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module Gitlab
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  module TemplateParser
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    # A class for tracking state when evaluating a template
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    class EvalState
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      MAX_LOOPS = 4
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      def initialize
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        @loops = 0
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      end
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      def enter_loop
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        if @loops == MAX_LOOPS
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          raise Error, "You can only nest up to #{MAX_LOOPS} loops"
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        end
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        @loops += 1
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        retval = yield
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        @loops -= 1
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        retval
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      end
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    end
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  end
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end
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