class RuboCop::Cop::Style::NegatedIf

end
bar
if !foo
# good
bar unless foo
# good
bar if !foo
# bad
# enforces ‘unless` for just `postfix` conditionals
@example EnforcedStyle: postfix
bar if !foo
# good
end
bar
unless foo
# good
end
bar
if !foo
# bad
# enforces `unless` for just `prefix` conditionals
@example EnforcedStyle: prefix
bar unless foo
# good
bar if !foo
# bad
end
bar
unless foo
# good
end
bar
if !foo
# bad
# enforces `unless` for `prefix` and `postfix` conditionals
@example EnforcedStyle: both (default)
* postfix
* prefix
* both
without else are considered. There are three different styles:
Checks for uses of if with a negated condition. Only ifs

def correct_style?(node) 

def correct_style?(node)
  (style == :prefix && node.modifier_form?) || (style == :postfix && !node.modifier_form?)
end

def message(node) 

def message(node)
  format(MSG, inverse: node.inverse_keyword, current: node.keyword)
end

def on_if(node) 

def on_if(node)
  return if node.unless? || node.elsif? || node.ternary?
  return if correct_style?(node)
  message = message(node)
  check_negative_conditional(node, message: message) do |corrector|
    ConditionCorrector.correct_negative_condition(corrector, node)
  end
end