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
on_if(node)
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# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 43 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 unless offense?(node) corrector.replace(node, replacement(node)) end end
Private Instance Methods
enforce_single_line_ternary_operator?(node)
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# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 75 def enforce_single_line_ternary_operator?(node) SINGLE_LINE_TYPES.include?(node.parent&.type) && !use_assignment_method?(node.parent) end
offense?(node)
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# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 57 def offense?(node) node.ternary? && node.multiline? end
replacement(node)
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# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 61 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
use_assignment_method?(node)
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# File lib/rubocop/cop/style/multiline_ternary_operator.rb, line 79 def use_assignment_method?(node) node.send_type? && node.assignment_method? end