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Diffstat (limited to 'gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst')
| -rw-r--r-- | gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst b/gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst index 6ef00c2..4541f2b 100644 --- a/gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst +++ b/gcc/ada/doc/gnat_rm/implementation_defined_aspects.rst @@ -317,23 +317,27 @@ The following is a typical example of use: type List is private with Iterable => (First => First_Cursor, Next => Advance, - Has_Element => Cursor_Has_Element, - [Element => Get_Element]); + Has_Element => Cursor_Has_Element + [,Element => Get_Element] + [,Last => Last_Cursor] + [,Previous => Retreat]); -* The value denoted by ``First`` must denote a primitive operation of the - container type that returns a ``Cursor``, which must a be a type declared in +* The values of ``First`` and ``Last`` are primitive operations of the + container type that return a ``Cursor``, which must be a type declared in the container package or visible from it. For example: .. code-block:: ada function First_Cursor (Cont : Container) return Cursor; + function Last_Cursor (Cont : Container) return Cursor; -* The value of ``Next`` is a primitive operation of the container type that takes - both a container and a cursor and yields a cursor. For example: +* The values of ``Next`` and ``Previous`` are primitive operations of the container type that take + both a container and a cursor and yield a cursor. For example: .. code-block:: ada function Advance (Cont : Container; Position : Cursor) return Cursor; + function Retreat (Cont : Container; Position : Cursor) return Cursor; * The value of ``Has_Element`` is a primitive operation of the container type that takes both a container and a cursor and yields a boolean. For example: |