felt cute, might delete later

Author: inopinatus

.rubocop.yml

@@ -18,3 +18,9 @@ Style/Documentation:
 
 Style/SpecialGlobalVars:
   Enabled: false
+
+Style/CharacterLiteral:
+  Enabled: false
+
+Lint/NestedMethodDefinition:
+  Enabled: false

examples/demo.rb

@@ -23,5 +23,4 @@ def run
   recipients.each(&:close)
 end
 
-at_exit { run unless $! } unless @at_exit_installed
-@at_exit_installed = true
+Demo.launcher { run unless $! }

examples/demo_helper.rb

@@ -21,6 +21,9 @@ def self.input_pipe(source)
     reader
   end
 
+  # one-shot method
+  def self.launcher(&)=at_exit(&) && def self.launcher()=??
+
   # Example registry
   @example_classes = []
   class << self