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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# Checks for single-line `do`...`end` block.
#
# In practice a single line `do`...`end` is autocorrected when `EnforcedStyle: semantic`
# in `Style/BlockDelimiters`. The autocorrection maintains the `do` ... `end` syntax to
# preserve semantics and does not change it to `{`...`}` block.
#
# @example
#
# # bad
# foo do |arg| bar(arg) end
#
# # good
# foo do |arg|
# bar(arg)
# end
#
# # bad
# ->(arg) do bar(arg) end
#
# # good
# ->(arg) { bar(arg) }
#
class SingleLineDoEndBlock < Base
extend AutoCorrector
MSG = 'Prefer multiline `do`...`end` block.'
# rubocop:disable Metrics/AbcSize
def on_block(node)
return if !node.single_line? || node.braces?
add_offense(node) do |corrector|
corrector.insert_after(do_line(node), "\n")
node_body = node.body
if node_body.respond_to?(:heredoc?) && node_body.heredoc?
corrector.remove(node.loc.end)
corrector.insert_after(node_body.loc.heredoc_end, "\nend")
else
corrector.insert_before(node.loc.end, "\n")
end
end
end
# rubocop:enable Metrics/AbcSize
alias on_numblock on_block
private
def do_line(node)
if node.numblock_type? || node.arguments.children.empty? || node.send_node.lambda_literal?
node.loc.begin
else
node.arguments
end
end
def x(corrector, node); end
end
end
end
end
Version data entries
113 entries across 113 versions & 9 rubygems