57         // imported variables
101 ``Block`` variables of global or ``static`` local variables.
126    b. The ``flags`` field is set to zero unless there are variables imported
170 variables, and variables marked ``__block``.  In Objective-C, variables may
189 variables.
196 structure.  Global variables are simply referenced and not considered as
199 Imported ``const`` copy variables
202 Automatic storage variables not marked with ``__block`` are imported as
320 Importing ``__attribute__((NSObject))`` variables
352 Imported ``__block`` marked variables
355 Layout of ``__block`` marked variables  argument
358 The compiler must embed variables that are marked ``__block`` in a specialized
373 level only variables that are of type ``Block`` or ones that have
408 Access to ``__block`` variables from within its lexical scope  argument
477 Importing ``__block`` variables into ``Blocks``  argument
551 Importing ``__attribute__((NSObject))`` ``__block`` variables  argument
561 Because ``Blocks`` referencing ``__block`` variables may have ``Block_copy()``
562 performed upon them the underlying storage for the variables may move to the
566 ``__block`` variables at all escapes or terminations of their scope.  The call
576 ``Blocks`` may contain ``Block`` literal expressions.  Any variables used within
578 variables are not used. This includes ``const`` imports as well as ``__block``
579 variables.
587 Objects should be treated as ``__attribute__((NSObject))`` variables; all
606 variables.  Under normal circumstances the compiler uses the Objective-C runtime
609 variables:
805 ``block_byref`` data structure as do other variables.  Such objects (if not
858 requires copy/dispose helpers if it imports any block variables, ``__block``
859 storage variables, ``__attribute__((NSObject))`` variables, or C++ ``const``
863 The block copy helper function should, for each of the variables of the type
893 block variables, ``__attribute__((NSObject))`` variables, or C++ ``const``
897 Under ObjC we allow ``__weak`` as an attribute on ``__block`` variables, and