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# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for `:true` and `:false` symbols.
# In most cases it would be a typo.
#
# @safety
# Autocorrection is unsafe for this cop because code relying
# on `:true` or `:false` symbols will break when those are
# changed to actual booleans.
#
# @example
#
# # bad
# :true
#
# # good
# true
#
# @example
#
# # bad
# :false
#
# # good
# false
class BooleanSymbol < Base
extend AutoCorrector
MSG = 'Symbol with a boolean name - you probably meant to use `%<boolean>s`.'
# @!method boolean_symbol?(node)
def_node_matcher :boolean_symbol?, '(sym {:true :false})'
def on_sym(node)
return unless boolean_symbol?(node)
parent = node.parent
return if parent&.array_type? && parent&.percent_literal?(:symbol)
add_offense(node, message: format(MSG, boolean: node.value)) do |corrector|
autocorrect(corrector, node)
end
end
private
def autocorrect(corrector, node)
boolean_literal = node.source.delete(':')
parent = node.parent
if parent&.pair_type? && node.equal?(parent.children[0])
corrector.remove(parent.loc.operator)
boolean_literal = "#{node.source} =>"
end
corrector.replace(node, boolean_literal)
end
end
end
end
end
Version data entries
21 entries across 21 versions & 4 rubygems