class RuboCop::Cop::Style::StderrPuts

This cop identifies places where `$stderr.puts` can be replaced by `warn`. The latter has the advantage of easily being disabled by, the `-W0` interpreter flag or setting `$VERBOSE` to `nil`.

@example

# bad
$stderr.puts('hello')

# good
warn('hello')

Constants

MSG

Public Instance Methods

autocorrect(node) click to toggle source
# File lib/rubocop/cop/style/stderr_puts.rb, line 36
def autocorrect(node)
  lambda do |corrector|
    corrector.replace(stderr_puts_range(node), 'warn')
  end
end
on_send(node) click to toggle source
# File lib/rubocop/cop/style/stderr_puts.rb, line 30
def on_send(node)
  return unless stderr_puts?(node)

  add_offense(node, location: stderr_puts_range(node))
end

Private Instance Methods

message(node) click to toggle source
# File lib/rubocop/cop/style/stderr_puts.rb, line 44
def message(node)
  format(MSG, bad: "#{node.receiver.source}.#{node.method_name}")
end
stderr_gvar?(sym) click to toggle source
# File lib/rubocop/cop/style/stderr_puts.rb, line 48
def stderr_gvar?(sym)
  sym == :$stderr
end
stderr_puts_range(send) click to toggle source
# File lib/rubocop/cop/style/stderr_puts.rb, line 52
def stderr_puts_range(send)
  range_between(
    send.loc.expression.begin_pos,
    send.loc.selector.end_pos
  )
end