class RuboCop::Cop::Style::MissingElse

end
# the content of the else branch will be determined by Style/EmptyElse
else
statement
if condition
# good
@example
end
statement
when condition
case var
# bad
@example
case
end
statement
if condition
# bad
@example
if
SupportedStyles
Checks for ‘if` expressions that do not have an `else` branch.

def check(node, _else_clause) 

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

def on_case(node) 

def on_case(node)
  check(node, case_else_clause(node)) unless style == :if
end

def on_normal_if_unless(node) 

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