class RuboCop::Cop::Layout::ElseAlignment
This cops checks the alignment of else keywords. Normally they should be aligned with an if/unless/while/until/begin/def keyword, but there are special cases when they should follow the same rules as the alignment of end.
@example
# bad if something code else code end # bad if something code elsif something code end # good if something code else code end
Constants
- MSG
Public Instance Methods
on_case(node)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 62 def on_case(node) return unless node.else? check_alignment(node.when_branches.last.loc.keyword, node.loc.else) end
on_if(node, base = nil)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 38 def on_if(node, base = nil) return if ignored_node?(node) return unless node.else? && begins_its_line?(node.loc.else) check_alignment(base_range(node, base), node.loc.else) return unless node.elsif_conditional? check_nested(node.else_branch, base) end
on_rescue(node)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 49 def on_rescue(node) return unless node.loc.respond_to?(:else) && node.loc.else parent = node.parent parent = parent.parent if parent.ensure_type? base = case parent.type when :def, :defs then base_for_method_definition(parent) when :kwbegin then parent.loc.begin else node.loc.keyword end check_alignment(base, node.loc.else) end
Private Instance Methods
base_for_method_definition(node)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 84 def base_for_method_definition(node) parent = node.parent if parent && parent.send_type? parent.loc.selector # For example "private def ..." else node.loc.keyword end end
base_range(node, base)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 75 def base_range(node, base) if base base.source_range else lineage = [node, *node.each_ancestor(:if)] lineage.find { |parent| parent.if? || parent.unless? }.loc.keyword end end
check_alignment(base_range, else_range)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 109 def check_alignment(base_range, else_range) return unless begins_its_line?(else_range) @column_delta = effective_column(base_range) - else_range.column return if @column_delta.zero? add_offense( else_range, location: else_range, message: format(MSG, else_range.source, base_range.source[/^\S*/]) ) end
check_assignment(node, rhs)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 93 def check_assignment(node, rhs) # If there are method calls chained to the right hand side of the # assignment, we let rhs be the receiver of those method calls before # we check its indentation. rhs = first_part_of_call_chain(rhs) return unless rhs end_config = config.for_cop('Lint/EndAlignment') style = end_config['EnforcedStyleAlignWith'] || 'keyword' base = variable_alignment?(node.loc, rhs, style.to_sym) ? node : rhs return unless rhs.if_type? check_nested(rhs, base) end
check_nested(node, base)
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# File lib/rubocop/cop/layout/else_alignment.rb, line 70 def check_nested(node, base) on_if(node, base) ignore_node(node) end