Some (strict) C++03 compilers (e.g. `gcc -std=c++03`) reject
'reference-to-reference' in the template and typedef which described
in CWG DR106 [1].
In such situations, iterator_facade rejects reference type as a value
type and some special iterators will become ill-formed:
the test libs/range/test/join.hpp might be descriptive.
[1] http://www.open-std.org/Jtc1/sc22/wg21/docs/cwg_defects.html#106
Signed-off-by: Kohei Takahashi <flast@flast.jp>
This change excludes boost:: and boost::detail:: namespaces from ADL for unqualified function calls (e.g. algorithms). This reduces the possibility of name clashes with other libraries and user's code. One of the effects should be fixing test failures on gcc 4.2 and 4.4 due to clashed with Boost.TypeTraits.
Also some of the functions marked with inline keyword.
This makes iterators defined using iterator_facade more friendly to type inspection and fixes its use with next()/prior() since commit 651a869d4f.
The arithmetic, indexing and relational operators are only defined if the iterator category or traversal permits that. Note that the implementation requires partial template specialization support now.
Reverted: 2e099caceb9..21102938e8ccb
I'm going to reapply some of them soon, but it's easier to revert them
all first, as there are conflicts. Also the number of changes that were
inserted since then, mean that there would be a huge gap between related
changes.
- The logic for determining the result of iterator_facade::operator[] has been factored out into a separate detail header in preparation for its potential use in iterator_range to avoid iterator_range::operator[] from returning a reference to a temporary.
[SVN r80901]
immutability of the pointed-to type via const qualification. The
pointee of a proxy-based iterator will be const qualified unless a
mutable reference to the value_type can be bound to the returned
proxy.
Added a test for pointee
Fixed iterator_facade so operator[] result type computation didn't
cause a problem with abstract types.
Updated iterator_facade operator[] docs for accuracy.
Allowed Borland to simply fail the indirect_iterator_member_types test
because of its lame const-dropping, instead of trying to work around
it.
[SVN r21579]
for handling vc6/7 deficiencies with iterator_traits.
Fixed a bug in iterator_facade which was causing incomplete types to
be passed through is_convertible.
Reinstated libs/utility/iterator_traits_test.cpp
[SVN r19840]
