Re: [boost] [GSoC][MPL11] Post C++Now update

I was one of the people at the conference that tried to convince Louis to approach things this way. I wasn't the only one, and I can only speak for myself. The advantage to me is that I might have a library that I can use to do *both* compile-time only, and runtime+compiletime operations. Now that I have constexpr function and decltype(), I find the lines between compiletime and runtime operations to be sufficiently blurred that I don't draw the clear distinction I once did. For instance, in C++14, I can simply elide certain metafunctions I used to require to compute the return values of certain functions -- anything that can be done with a fold can be written in the form "auto foo (args) { return fold(some_fn, args); }". This makes me gravitate towards a solution that marries runtime and compile time as much as possible. That being said, it doesn't look like Louis is committed to one approach or another yet; he is still investigating. Also, he is not committed to making a drop-in Fusion replacement, just an updated MPL for C++11/14. He is simply trying to incorporate Fusion-like elements in that where they are appropriate. Louis, please correct me if I'm mistaken. Zach On Mon, May 19, 2014 at 5:21 AM, Joel de Guzman wrote:

On 5/19/14, 3:49 PM, Gonzalo BG wrote:

...

On Mon, May 19, 2014 at 2:47 AM, Hartmut Kaiser

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wrote:

Moreover, Christopher Schmidt finished a full C++11 rewrite of Fusion

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during GSoC 2009. It might be a good idea to go back and look what he came up with.

What happened with that rewrite?

Are there any plans to review it/merge it with master?

See my other post.

Regards, -- Joel de Guzman http://www.ciere.com http://boost-spirit.com http://www.cycfi.com/

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