class RuboCop::Cop::Style::MultilineTernaryOperator
Checks for multi-line ternary op expressions.
NOTE: ‘return if … else … end` is syntax error. If `return` is used before multiline ternary operator expression, it will be autocorrected to single-line ternary operator. The same is true for `break`, `next`, and method call.
@example
# bad a = cond ? b : c a = cond ? b : c a = cond ? b : c return cond ? b : c # good a = cond ? b : c a = if cond b else c end return cond ? b : c
Constants
- MSG_IF
- MSG_SINGLE_LINE
- SINGLE_LINE_TYPES
Public Instance Methods
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 44 def on_if(node) return unless offense?(node) message = enforce_single_line_ternary_operator?(node) ? MSG_SINGLE_LINE : MSG_IF add_offense(node, message: message) do |corrector| next if part_of_ignored_node?(node) autocorrect(corrector, node) ignore_node(node) end end
Private Instance Methods
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 64 def autocorrect(corrector, node) corrector.replace(node, replacement(node)) return unless (parent = node.parent) return unless (comments_in_condition = comments_in_condition(node)) corrector.insert_before(parent, comments_in_condition) end
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 86 def comments_in_condition(node) comments_in_range(node).map do |comment| "#{comment.source}\n" end.join end
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 92 def enforce_single_line_ternary_operator?(node) SINGLE_LINE_TYPES.include?(node.parent&.type) && !use_assignment_method?(node.parent) end
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 60 def offense?(node) node.ternary? && node.multiline? && node.source != replacement(node) end
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 72 def replacement(node) if enforce_single_line_ternary_operator?(node) "#{node.condition.source} ? #{node.if_branch.source} : #{node.else_branch.source}" else <<~RUBY.chop if #{node.condition.source} #{node.if_branch.source} else #{node.else_branch.source} end RUBY end end
Source
# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 96 def use_assignment_method?(node) node.send_type? && node.assignment_method? end