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removed same diff type req from Interoperator

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and did some work on permutation iterator


[SVN r21705]
This commit is contained in:
Jeremy Siek
2004-01-13 21:00:31 +00:00
parent 9540444061
commit d2dae62215
4 changed files with 195 additions and 75 deletions
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24
doc/new-iter-concepts.rst
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@ -669,11 +669,11 @@ Interoperable Iterators [lib.interoperable.iterators]
A class or built-in type ``X`` that models Single Pass Iterator is
*interoperable with* a class or built-in type ``Y`` that also models
Single Pass Iterator if both ``X`` and ``Y`` have the same difference
type and traversal tag and if the following expressions are valid and
respect the stated semantics. In the tables below, ``x`` is an object
of type ``X``, ``y`` is an object of type ``Y``, ``Distance`` is
``iterator_traits<X>::difference_type``, and ``n`` represents a
Single Pass Iterator if both ``X`` and ``Y`` have the same traversal
tag and if the following expressions are valid and respect the stated
semantics. In the tables below, ``x`` is an object of type ``X``,
``y`` is an object of type ``Y``, ``Distance`` is
``iterator_traits<Y>::difference_type``, and ``n`` represents a
constant object of type ``Distance``.
If the traversal tag for ``X`` and ``Y`` is convertible to
@ -724,16 +724,16 @@ be met.
+-------------------------------------------+-------------------------------------------------+-------------------------+----------------------+
|``y <= x`` |convertible to ``bool`` |``!(y > x)`` | |
+-------------------------------------------+-------------------------------------------------+-------------------------+----------------------+
|``y - x`` |``Distance`` |``x < y ? distance(x,y) |pre: there exists a |
| | |: -distance(y,x)`` |value ``n`` of |
| | | |``Distance`` such that|
|``y - x`` |``Distance`` |``x < y ? |pre: there exists a |
| | |distance(Y(x),y) |value ``n`` of |
| | |: -distance(y,Y(x))`` |``Distance`` such that|
| | | |``x + n == y``. ``y |
| | | |== x + (y - x)``. |
+-------------------------------------------+-------------------------------------------------+-------------------------+----------------------+
|``x - y`` |``Distance`` |``y < x ? distance(y,x) |pre: there exists a |
| | |: -distance(x,y)`` |value ``n`` of |
| | | |``Distance`` such that|
| | | |``y + n == x``. ``x |
|``x - y`` |``Distance`` |``y < x ? |pre: there exists a |
| | |distance(y,Y(x)) |value ``n`` of |
| | |: -distance(Y(x),y)`` |``Distance`` such that|
| | | |``y + n == x``. ``x |
| | | |== y + (x - y)``. |
+-------------------------------------------+-------------------------------------------------+-------------------------+----------------------+