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# frozen_string_literal: true
module RuboCop
module Cop
module Style
# Checks for uses of the character literal ?x.
# Starting with Ruby 1.9 character literals are
# essentially one-character strings, so this syntax
# is mostly redundant at this point.
#
# ? character literal can be used to express meta and control character.
# That's a good use case of ? literal so it doesn't count it as an offense.
#
# @example
# # bad
# ?x
#
# # good
# 'x'
#
# # good - control & meta escapes
# ?\C-\M-d
# "\C-\M-d" # same as above
class CharacterLiteral < Base
include StringHelp
extend AutoCorrector
MSG = 'Do not use the character literal - use string literal instead.'
def offense?(node)
# we don't register an offense for things like ?\C-\M-d
node.character_literal? && node.source.size.between?(2, 3)
end
def autocorrect(corrector, node)
string = node.source[1..]
# special character like \n
# or ' which needs to use "" or be escaped.
if string.length == 2 || string == "'"
corrector.replace(node, %("#{string}"))
elsif string.length == 1 # normal character
corrector.replace(node, "'#{string}'")
end
end
# Dummy implementation of method in ConfigurableEnforcedStyle that is
# called from StringHelp.
def opposite_style_detected; end
# Dummy implementation of method in ConfigurableEnforcedStyle that is
# called from StringHelp.
def correct_style_detected; end
end
end
end
end
Version data entries
181 entries across 180 versions & 19 rubygems