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implemented 'R ptr T' syntax

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Araq 2014-04-13 22:31:49 +02:00
commit d96f25619a
4 changed files with 17 additions and 11 deletions
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15
doc/manual.txt
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@ -1380,13 +1380,16 @@ development of OS kernels:
Kernel = object
Userspace = object
var a: ptr[Kernel, Stat]
var b: ptr[Userspace, Stat]
var a: Kernel ptr Stat
var b: Userspace ptr Stat
# the following does not compile as the pointer types are incompatible:
a = b
In order to make generic code easier tor write ``ptr T`` is a subtype
As the example shows ``ptr`` can also be used as a binary
operator, ``region ptr T`` is a shortcut for ``ptr[region, T]``.
In order to make generic code easier to write ``ptr T`` is a subtype
of ``ptr[R, T]`` for any ``R``.
Furthermore the subtype relation of the region object types is lifted to
@ -1417,11 +1420,9 @@ not compatible to ``pointer`` to prevent the following from compiling:
Future directions:
* Memory regions might become available for ``string`` and ``seq`` too.
* Bultin regions like ``private``, ``global`` and ``local`` will
* Builtin regions like ``private``, ``global`` and ``local`` will
prove very useful for the upcoming OpenCL target.
* Bultin "regions" can model ``lent`` and ``unique`` pointers.
* Syntactially ``ptr`` might become an infix operator so that ``region ptr T``
is transformed into ``ptr[region, T]``.
* Builtin "regions" can model ``lent`` and ``unique`` pointers.