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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks the style of children definitions at classes and
# modules. Basically there are two different styles:
#
# nested - have each child on its own line
# class Foo
# class Bar
# end
# end
#
# compact - combine definitions as much as possible
# class Foo::Bar
# end
#
# The compact style is only forced for classes/modules with one child.
class ClassAndModuleChildren < Cop
include ConfigurableEnforcedStyle
NESTED_MSG = 'Use nested module/class definitions instead of ' \
'compact style.'.freeze
COMPACT_MSG = 'Use compact module/class definition instead of ' \
'nested style.'.freeze
def on_class(node)
_name, superclass, body = *node
return if superclass && style != :nested
check_style(node, body)
end
def on_module(node)
_name, body = *node
check_style(node, body)
end
private
def check_style(node, body)
if style == :nested
check_nested_style(node)
else
check_compact_style(node, body)
end
end
def check_nested_style(node)
return unless compact_node_name?(node)
add_offense(node, :name, NESTED_MSG)
end
def check_compact_style(node, body)
return unless one_child?(body) && !compact_node_name?(node)
add_offense(node, :name, COMPACT_MSG)
end
def one_child?(body)
body && [:module, :class].include?(body.type)
end
def compact_node_name?(node)
node.loc.name.source =~ /::/
end
end
end
end
end
Version data entries
13 entries across 13 versions & 2 rubygems