class RuboCop::Cop::Style::OrAssignment

This cop checks for potential usage of the `||=` operator.

@example

# bad
name = name ? name : 'Bozhidar'

# bad
name = if name
         name
       else
         'Bozhidar'
       end

# bad
unless name
  name = 'Bozhidar'
end

# bad
name = 'Bozhidar' unless name

# good - set name to 'Bozhidar', only if it's nil or false
name ||= 'Bozhidar'

Constants

MSG

Public Instance Methods

on_cvasgn(node)
Alias for: on_lvasgn
on_gvasgn(node)
Alias for: on_lvasgn
on_if(node) click to toggle source
# File lib/rubocop/cop/style/or_assignment.rb, line 46
def on_if(node)
  return unless unless_assignment?(node)
  add_offense(node)
end
on_ivasgn(node)
Alias for: on_lvasgn
on_lvasgn(node) click to toggle source
# File lib/rubocop/cop/style/or_assignment.rb, line 51
def on_lvasgn(node)
  return unless ternary_assignment?(node)
  add_offense(node)
end
Also aliased as: on_ivasgn, on_cvasgn, on_gvasgn

Private Instance Methods

autocorrect(node) click to toggle source
# File lib/rubocop/cop/style/or_assignment.rb, line 62
def autocorrect(node)
  if ternary_assignment?(node)
    variable, default = take_variable_and_default_from_ternary(node)
  else
    variable, default = take_variable_and_default_from_unless(node)
  end

  lambda do |corrector|
    corrector.replace(node.source_range,
                      "#{variable} ||= #{default.source}")
  end
end
take_variable_and_default_from_ternary(node) click to toggle source
# File lib/rubocop/cop/style/or_assignment.rb, line 75
def take_variable_and_default_from_ternary(node)
  variable, if_statement = *node
  [variable, if_statement.else_branch]
end
take_variable_and_default_from_unless(node) click to toggle source
# File lib/rubocop/cop/style/or_assignment.rb, line 80
def take_variable_and_default_from_unless(node)
  variable, default = *node.if_branch
  [variable, default]
end