class RuboCop::Cop::Style::EmptyElse
Checks for empty else-clauses, possibly including comments and/or an explicit `nil` depending on the EnforcedStyle.
@example EnforcedStyle: both (default)
# warn on empty else and else with nil in it # bad if condition statement else nil end # bad if condition statement else end # good if condition statement else statement end # good if condition statement end
@example EnforcedStyle: empty
# warn only on empty else # bad if condition statement else end # good if condition statement else nil end # good if condition statement else statement end # good if condition statement end
@example EnforcedStyle: nil
# warn on else with nil in it # bad if condition statement else nil end # good if condition statement else end # good if condition statement else statement end # good if condition statement end
@example AllowComments: false (default)
# bad if condition statement else # something comment nil end # bad if condition statement else # something comment end
@example AllowComments: true
# good if condition statement else # something comment nil end # good if condition statement else # something comment end
Constants
- MSG
Public Instance Methods
on_case(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 139 def on_case(node) check(node) end
on_normal_if_unless(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 135 def on_normal_if_unless(node) check(node) end
Private Instance Methods
autocorrect(corrector, node)
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# File lib/rubocop/cop/style/empty_else.rb, line 172 def autocorrect(corrector, node) return false if autocorrect_forbidden?(node.type.to_s) return false if comment_in_else?(node.loc) end_pos = base_node(node).loc.end.begin_pos corrector.remove(range_between(node.loc.else.begin_pos, end_pos)) end
autocorrect_forbidden?(type)
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# File lib/rubocop/cop/style/empty_else.rb, line 193 def autocorrect_forbidden?(type) [type, 'both'].include?(missing_else_style) end
base_node(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 186 def base_node(node) return node if node.case_type? return node unless node.elsif? node.each_ancestor(:if, :case, :when).find(-> { node }) { |parent| parent.loc.end } end
check(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 145 def check(node) return if cop_config['AllowComments'] && comment_in_else?(node.loc) empty_check(node) if empty_style? nil_check(node) if nil_style? end
comment_in_else?(loc)
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# File lib/rubocop/cop/style/empty_else.rb, line 180 def comment_in_else?(loc) return false if loc.else.nil? || loc.end.nil? processed_source.contains_comment?(loc.else.join(loc.end)) end
empty_check(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 160 def empty_check(node) return unless node.else? && !node.else_branch add_offense(node.loc.else) { |corrector| autocorrect(corrector, node) } end
empty_style?()
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# File lib/rubocop/cop/style/empty_else.rb, line 156 def empty_style? style == :empty || style == :both end
missing_else_style()
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# File lib/rubocop/cop/style/empty_else.rb, line 197 def missing_else_style missing_cfg = config.for_cop('Style/MissingElse') missing_cfg.fetch('Enabled') ? missing_cfg['EnforcedStyle'] : nil end
nil_check(node)
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# File lib/rubocop/cop/style/empty_else.rb, line 166 def nil_check(node) return unless node.else_branch&.nil_type? add_offense(node.loc.else) { |corrector| autocorrect(corrector, node) } end
nil_style?()
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# File lib/rubocop/cop/style/empty_else.rb, line 152 def nil_style? style == :nil || style == :both end