Sha256: da8fe47fd54b166b9ab145cca8355f11db79aa573548a32b4373f5429d88dce8
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Contents
# encoding: utf-8
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for odd else block layout - like
# having an expression on the same line as the else keyword,
# which is usually a mistake.
#
# @example
#
# if something
# ...
# else do_this
# do_that
# end
class ElseLayout < Cop
include IfNode
def on_if(node)
return if ternary?(node)
# ignore modifier ops & elsif nodes
return unless node.loc.end
check(node)
end
private
def check(node)
return unless node
return check_else(node) if else?(node)
check_if(node) if if?(node)
end
def check_else(node)
_cond, _if_branch, else_branch = *node
return unless else_branch && else_branch.type == :begin
first_else_expr = else_branch.children.first
return unless first_else_expr.source_range.line == node.loc.else.line
add_offense(first_else_expr, :expression, message)
end
def check_if(node)
_cond, _if_branch, else_branch = *node
check(else_branch)
end
def if?(node)
node.loc.respond_to?(:keyword) &&
%w(if elsif).include?(node.loc.keyword.source)
end
def else?(node)
node.loc.respond_to?(:else) && node.loc.else &&
node.loc.else.is?('else')
end
def message
'Odd `else` layout detected. Did you mean to use `elsif`?'
end
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems