boostorg/iterator
1
0
Fork 1
mirror of https://github.com/boostorg/iterator.git synced 2025-07-29 20:37:17 +02:00
Code Issues Packages Projects Releases Wiki Activity

small change to iterator_tag body

Browse Source 
[SVN r20154]
This commit is contained in:
Jeremy Siek
2003-09-22 15:55:22 +00:00
parent 9ac583096c
commit 5efcabf3bd
2 changed files with 17 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
doc/new-iter-concepts.rst
View File

@ -642,9 +642,9 @@ Addition to [lib.iterator.synopsis]
enum iterator_access { readable_iterator = 1, writable_iterator = 2,
swappable_iterator = 4, lvalue_iterator = 8 };
template <iterator_access x, class TraversalTag>
template <unsigned int access_bits, class TraversalTag>
struct iterator_tag : /* appropriate old category or categories */ {
static const iterator_access access = x;
static const iterator_access access = (iterator_access)access_bits;
typedef TraversalTag traversal;
};
@ -696,9 +696,13 @@ pseudo-code.
return output_iterator_tag;
else
return null_category_tag;
If the argument for ``TraversalTag`` is not convertible to
``incrementable_iterator_tag`` then the programm is ill-formed.
The access argument is declared to be ``unsigned int`` instead of the
enum ``iterator_access`` for convenience of use. For example, the
expression ``(readable_iterator | writable_iterator)`` produces an
unsigned int, not ``iterator_access``. If the argument for
``TraversalTag`` is not convertible to ``incrementable_iterator_tag``
then the programm is ill-formed.
The ``is_readable``, ``is_writable``, ``is_swappable``, and
``traversal_category`` class templates are traits classes. For