[Cython] Fused types syntax

[mark florisson]

On 2 June 2011 18:39, Robert Bradshaw <robertwb at math.washington.edu> wrote:
> In looking at merging fused types, it's time to nail down the syntax.
> The current implementation is
>
>    ctypedef cython.fused_type(list, dict, object) fused_t
>
> This requires an addition to the grammer to allow the "call" syntax in
> a type declaration, as well as special casing to make it allowed only
> in a typedef. What about
>
>    cython.fused_type[list, dict, object].
>
> One advantage is that indexing is already valid in type declarations,
> and its the typical syntax for parameterized types. Thoughts? Any
> other ideas?

I like it, so I'll give another +1. Changing wouldn't be too much work anyways.

> - Robert
>
>
> P.S. Anyone remember buffers and C++ templated types are dissallowed
> as typedefs?

Yes, there's even a test for it: tests/errors/buffertypedef_T117.pyx
(http://trac.cython.org/cython_trac/ticket/117). But it looks more
like an easy fix than a feature.

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