$foo += bar ^^^^^^^^^^^
$foo &&= bar ^^^^^^^^^^^^
$foo ||= bar ^^^^^^^^^^^^
foo += bar ^^^^^^^^^^
foo &&= bar ^^^^^^^^^^^
foo ||= bar ^^^^^^^^^^^
@@foo += bar ^^^^^^^^^^^^
@@foo &&= bar ^^^^^^^^^^^^^
@@foo ||= bar ^^^^^^^^^^^^^
Foo::Bar += baz ^^^^^^^^^^^^^^^
Foo::Bar &&= baz ^^^^^^^^^^^^^^^^
Foo::Bar ||= baz ^^^^^^^^^^^^^^^^
$foo += bar ^^^^^^^^^^^
$foo &&= bar ^^^^^^^^^^^^
$foo ||= bar ^^^^^^^^^^^^
foo += bar ^^^^^^^^^^
foo &&= bar ^^^^^^^^^^^
foo ||= bar ^^^^^^^^^^^
Clear recorded tracing information.
Quietly ensure the Gem directory dir contains all the proper subdirectories for handling default gems. If we can’t create a directory due to a permission problem, then we will silently continue.
If mode is given, missing directories are created with this mode.
World-writable directories will never be created.
Creates a State object from opts, which ought to be Hash to create a new State instance configured by opts, something else to create an unconfigured instance. If opts is a State object, it is just returned.