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Subject: Re: [boost] [type_traits][parameter] Inconsistent boost::is_convertible between gcc and clang
From: Michel Morin (mimomorin_at_[hidden])
Date: 2012-08-18 11:39:11

Hi John,

> Apologies for the delay, as I have no time right now,
> can you please let me have this as a patch,
> and verify our test suite passes?

There three fixes for `is_convertible<From, To>` in the new code.
A. `To` is a function type.
B. `From` is an rvalue in C++11.
C. `From` is an rvalue in C++03.

Patches (of the code and test) for A are attached in
Since it is trivial to fix, may I commit it?

For B and C, I'll make patches one by one and then
post a message (or file a ticket and attach a patch there).

> Any changes should also probably be dependent
> upon BOOST_NO_SFINAE_EXPR as well as I believe
> the technique depends upon that.

The current implementation does not use BOOST_NO_SFINAE_EXPR.
Do I need to use it for the new code? The new code does not use
more compiler functionality than the current code. It uses the same
functionality as the current one.


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