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Add note about semi-opaque structure types.

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Gareth Rees 2012-10-22 23:00:21 +01:00
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7
mps/manual/source/topic/interface.rst
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@ -78,6 +78,13 @@ Types
mps_arena_s *``, but the implementation of ``struct mps_arena_s``
is not public.
There are a few structure types that are declared in ``mps.h`` but
whose implementation is not public. These only exist so that code
can be inlined using macros. The most important of these is the
:term:`scan state` structure ``mps_ss_s``, which is accessed by
scanning macros such as :c:func:`MPS_SCAN_BEGIN` and
:c:func:`MPS_FIX12`.
4. A *derived type* is a structure or function type based on
transparent and opaque types and on built-in C types. The degree
to which you may or must depend upon the implementation of a