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Versions: 9
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Contents
# encoding: utf-8
module RuboCop
module Cop
module Style
# Use `Kernel#loop` for infinite loops.
#
# @example
# # bad
# while true
# work
# end
#
# # good
# loop do
# work
# end
class InfiniteLoop < Cop
MSG = 'Use `Kernel#loop` for infinite loops.'
TRUTHY_LITERALS = [:str, :dstr, :int, :float, :array,
:hash, :regexp, :true]
FALSEY_LITERALS = [:nil, :false]
def on_while(node)
condition, = *node
return unless TRUTHY_LITERALS.include?(condition.type)
add_offense(node, :keyword)
end
def on_until(node)
condition, = *node
return unless FALSEY_LITERALS.include?(condition.type)
add_offense(node, :keyword)
end
def autocorrect(node)
condition_node, = *node
start_range = node.loc.keyword.begin
end_range = if node.loc.begin
node.loc.begin.end
else
condition_node.loc.expression.end
end
lambda do |corrector|
corrector.replace(start_range.join(end_range), 'loop do')
end
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems