class RuboCop::Cop::Style::SingleLineDoEndBlock
Checks for single-line ‘do`…`end` block.
In practice a single line ‘do`…`end` is autocorrected when `EnforcedStyle: semantic` is configured for `Style/BlockDelimiters`. The autocorrection maintains the `do` … `end` syntax to preserve semantics and does not change it to `{`…`}` block.
NOTE: If ‘InspectBlocks` is set to `true` for `Layout/RedundantLineBreak`, blocks will be autocorrected to be on a single line if possible. This cop respects that configuration by not registering an offense if it would subsequently cause a `Layout/RedundantLineBreak` offense.
@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) }
Constants
- MSG
Public Instance Methods
Source
# File lib/rubocop/cop/style/single_line_do_end_block.rb, line 40 def on_block(node) return if !node.single_line? || node.braces? return if single_line_blocks_preferred? && suitable_as_single_line?(node) 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:disable Metrics/AbcSize
Also aliased as: on_numblock, on_itblock
Private Instance Methods
Source
# File lib/rubocop/cop/style/single_line_do_end_block.rb, line 63 def do_line(node) if node.type?(:numblock, :itblock) || node.arguments.children.empty? || node.send_node.lambda_literal? node.loc.begin else node.arguments end end
Source
# File lib/rubocop/cop/style/single_line_do_end_block.rb, line 72 def single_line_blocks_preferred? @config.for_enabled_cop('Layout/RedundantLineBreak')['InspectBlocks'] end