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Size: 1023 Bytes
Versions: 5
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Stored size: 1023 Bytes
Contents
# encoding: utf-8
module Rubocop
module Cop
module Style
# This cop checks whether the block arguments of a single-line
# reduce(inject) call are named *a*(for accumulator) and *e*
# (for element).
class ReduceArguments < Cop
MSG = 'Name reduce block arguments |a, e| (accumulator, element).'
ARGS_NODE = s(:args, s(:arg, :a), s(:arg, :e))
def on_block(node)
# we care only for single line blocks
return unless Util.block_length(node) == 0
method_node, args_node, _body_node = *node
receiver, method_name, _method_args = *method_node
# discard other scenarios
return unless receiver
return unless [:reduce, :inject].include?(method_name)
# discard second argument destructuring
_, element_node = *args_node
return unless element_node.type == :arg
convention(args_node, :expression) unless args_node == ARGS_NODE
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems