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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# Checks for `if` expressions that do not have an `else` branch.
# SupportedStyles
#
# if
# @example
# # bad
# if condition
# statement
# end
#
# case
# @example
# # bad
# case var
# when condition
# statement
# end
#
# @example
# # good
# if condition
# statement
# else
# # the content of the else branch will be determined by Style/EmptyElse
# end
class MissingElse < Cop
include OnNormalIfUnless
include ConfigurableEnforcedStyle
MSG = '`%s` condition requires an `else`-clause.'.freeze
MSG_NIL = '`%s` condition requires an `else`-clause with ' \
'`nil` in it.'.freeze
MSG_EMPTY = '`%s` condition requires an empty `else`-clause.'.freeze
def on_normal_if_unless(node)
unless_else_cop = config.for_cop('Style/UnlessElse')
unless_else_enabled = unless_else_cop['Enabled'] if unless_else_cop
return if unless_else_enabled &&
node.loc.keyword &&
node.loc.keyword.is?('unless')
check(node, if_else_clause(node)) unless style == :case
end
def on_case(node)
check(node, case_else_clause(node)) unless style == :if
end
private
def check(node, _else_clause)
return if node.loc.else
empty_else = config.for_cop('Style/EmptyElse')
if empty_else && empty_else['Enabled']
case empty_else['EnforcedStyle']
when 'empty'
add_offense(node, :expression, format(MSG_NIL, node.type))
when 'nil'
add_offense(node, :expression, format(MSG_EMPTY, node.type))
end
end
add_offense(node, :expression, format(MSG, node.type))
end
end
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems