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Versions: 11
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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop looks for *unless* expressions with *else* clauses.
class UnlessElse < Cop
MSG = 'Do not use `unless` with `else`. Rewrite these with the ' \
'positive case first.'.freeze
def on_if(node)
loc = node.loc
# discard ternary ops and modifier if/unless nodes
return unless loc.respond_to?(:keyword) && loc.respond_to?(:else)
return unless loc.keyword.is?('unless'.freeze) && loc.else
add_offense(node, :expression)
end
def autocorrect(node)
condition, = *node
body_range = range_between_condition_and_else(node, condition)
else_range = range_between_else_and_end(node)
lambda do |corrector|
corrector.replace(node.loc.keyword, 'if'.freeze)
corrector.replace(body_range, else_range.source)
corrector.replace(else_range, body_range.source)
end
end
def range_between_condition_and_else(node, condition)
range_between(condition.source_range.end_pos, node.loc.else.begin_pos)
end
def range_between_else_and_end(node)
range_between(node.loc.else.end_pos, node.loc.end.begin_pos)
end
end
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems