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Separate access and traversal for iterator_adaptor

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[SVN r20162]
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Dave Abrahams
2003-09-22 19:55:01 +00:00
parent 50fe1b062b
commit ebb09db44e
12 changed files with 485 additions and 170 deletions
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19
doc/iterator_adaptor_body.rst
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@ -18,15 +18,16 @@ iterator. It need only support the operations used by the core
interface functions of ``iterator_adaptor`` that have not been
redefined in the user's derived class.
Several of the template parameters of ``iterator_adaptor`` default to
``use_default``. This allows the user to make use of a default
parameter even when the user wants to specify a parameter later in the
parameter list. Also, the defaults for the corresponding associated
types are fairly complicated, so metaprogramming is required to
compute them, and ``use_default`` can help to simplify the
implementation. Finally, ``use_default`` is not left unspecified
Several of the template parameters of ``iterator_adaptor`` default
to ``use_default`` (or ``use_default_access``). This allows the
user to make use of a default parameter even when she wants to
specify a parameter later in the parameter list. Also, the
defaults for the corresponding associated types are somewhat
complicated, so metaprogramming is required to compute them, and
``use_default`` can help to simplify the implementation. Finally,
the identity of the ``use_default`` type is not left unspecified
because specification helps to highlight that the ``Reference``
template parameter may not always be identical to the iterator's
``reference`` type, and will keep users making mistakes based on that
assumption.
``reference`` type, and will keep users making mistakes based on
that assumption.