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Contents
# encoding: utf-8
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop looks for error classes inheriting from `Exception`.
# It is configurable to suggest using either `RuntimeError` (default) or
# `StandardError` instead.
#
# @example
#
# # bad
#
# class C < Exception; end
#
# @example
#
# # EnforcedStyle: runtime_error (default)
#
# # good
#
# class C < RuntimeError; end
#
# @example
#
# # EnforcedStyle: standard_error
#
# # good
#
# class C < StandardError; end
class InheritException < Cop
include ConfigurableEnforcedStyle
MSG = 'Inherit from `%s` instead of `Exception`.'.freeze
PREFERRED_BASE_CLASS = {
runtime_error: 'RuntimeError',
standard_error: 'StandardError'
}.freeze
def on_class(node)
_class, base_class, _body = *node
return if base_class.nil?
check(base_class)
end
private
def check(node)
if node.const_name == 'Exception'
add_offense(node, :expression, format(MSG, preferred_base_class))
end
end
def autocorrect(node)
lambda do |corrector|
corrector.replace(node.loc.expression, preferred_base_class)
end
end
def preferred_base_class
PREFERRED_BASE_CLASS[style]
end
end
end
end
end
Version data entries
6 entries across 6 versions & 2 rubygems