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# frozen_string_literal: true
module RuboCop
module Cop
# Common functionality for dealing with frozen string literals.
module FrozenStringLiteral
module_function
FROZEN_STRING_LITERAL = '# frozen_string_literal:'.freeze
FROZEN_STRING_LITERAL_ENABLED = '# frozen_string_literal: true'.freeze
FROZEN_STRING_LITERAL_TYPES = %i[str dstr].freeze
def frozen_string_literal_comment_exists?
leading_comment_lines.any? do |line|
MagicComment.parse(line).frozen_string_literal_specified?
end
end
private
def frozen_string_literals_enabled?
ruby_version = processed_source.ruby_version
return false unless ruby_version
# TODO: Ruby officially abandon making frozen string literals default
# for Ruby 3.0.
# https://bugs.ruby-lang.org/issues/11473#note-53
# Whether frozen string literals will be the default after Ruby 3.0
# or not is still unclear as of January 2019.
# It may be necessary to add this code in the future.
#
# return true if ruby_version >= 3.1
#
# And the above `ruby_version >= 3.1` is undecided whether it will be
# Ruby 3.1, 3.2, 4.0 or others.
# See https://bugs.ruby-lang.org/issues/8976#note-41 for details.
return false unless ruby_version >= 2.3
leading_comment_lines.any? do |line|
MagicComment.parse(line).frozen_string_literal?
end
end
def leading_comment_lines
comments = processed_source.comments
comments.each_with_object([]) do |comment, leading_comments|
next if comment.loc.line > 3
leading_comments << comment.text
end
end
end
end
end
Version data entries
6,763 entries across 6,759 versions & 23 rubygems