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Re: limited reflection proposal for C++

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Am 22.07.2011 18:07, schrieb Andrzej Krzemieński:
>
> Hi everyone,
> I intend to propose a small reflection-like utility for the next C++
> standard (which would be something like C++16?). My proposal is still
> in progress, but I would like to collect input from you as early as it
> is possible. I would appreciate your feedback.
> Here is the current description.
> https://docs.google.com/document/pub?id=18Jr3UfvQvbWh2pXQ4Wm4e8-PYdV2aTXpPtNNOicgGjw

I like your proposal. But there is one subtlety which might make
std::tuple inappropriate for the API: std::tuple enforces a copy 
constructor of the form

tuple(const tuple&) = default;

This means that this could cause problems, if at least one member or 
base class type M has a mutating copy constructor of the form

M::M(M&);

I'm mentioning this, because this reflection-utility should IMO be 
useful for all valid C++ types. Of-course one could consider this as a 
library problem and in fact recently a new issue has been opened for 
std::pair in this regard, because the C++03 std::pair was able to host 
types with a source-mutating copy constructor/assignment operator. 
Nonetheless, this is a library issue currently and this should better 
not have impact on something like this very core-language near utility. 
I would hope that the tuple/pair copy problem can be solved soon, but I 
would like to emphasize that we have this problem at the moment.

HTH & Greetings from Bremen,

Daniel Krügler




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limited reflection proposal for C++ Andrzej Krzemieński<akrzemi1@gmail.com> - 2011-07-22 10:07 -0600
  Re: limited reflection proposal for C++ BGB <cr88192@hotmail.com> - 2011-07-28 16:28 -0600
    Re: limited reflection proposal for C++ Andrzej Krzemieński <akrzemi1@gmail.com> - 2011-07-30 13:13 -0600
      Re: limited reflection proposal for C++ BGB <cr88192@hotmail.com> - 2011-07-31 17:09 -0600
  Re: limited reflection proposal for C++ Daniel Krügler <daniel.kruegler@googlemail.com> - 2011-07-28 16:24 -0600
  Re: limited reflection proposal for C++ Jeff Flinn <TriumphSprint2000@hotmail.com> - 2011-07-30 13:16 -0600
    Re: limited reflection proposal for C++ Andrzej Krzemieński<akrzemi1@gmail.com> - 2011-08-02 18:15 -0600

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