Sha256: a3942516c8422921064d212ddb5ee96a62a7084b48f6c289476f4a2af37af841
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Size: 1.34 KB
Versions: 9
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Stored size: 1.34 KB
Contents
# encoding: utf-8
# frozen_string_literal: true
module RuboCop
module Cop
module Performance
# Do not compute the size of statically sized objects.
class FixedSize < Cop
MSG = 'Do not compute the size of statically sized objects.'.freeze
def_node_matcher :counter, <<-MATCHER
(send ${array hash str sym} {:count :length :size} $...)
MATCHER
def on_send(node)
counter(node) do |variable, arg|
return if contains_splat?(variable)
return if contains_double_splat?(variable)
return if !arg.nil? && string_argument?(arg.first)
if node.parent
return if node.parent.casgn_type? || node.parent.block_type?
end
add_offense(node, :expression)
end
end
private
def contains_splat?(node)
return unless node.array_type?
node.children.any? do |child|
child.respond_to?(:splat_type?) && child.splat_type?
end
end
def contains_double_splat?(node)
return unless node.hash_type?
node.children.any? do |child|
child.respond_to?(:kwsplat_type?) && child.kwsplat_type?
end
end
def string_argument?(node)
node && !node.str_type?
end
end
end
end
end
Version data entries
9 entries across 9 versions & 2 rubygems