[boost] Review request: Require a SFINAE capable compiler

Subject: [boost] Review request: Require a SFINAE capable compiler
From: Stephen Kelly (steveire_at_[hidden])
Date: 2013-10-12 04:06:28

Hello,

Several of the ancient compilers define BOOST_NO_SFINAE.

The attached patch removes support for those versions of the compilers
which are not capable of SFINAE.

This bumps the compiler requirement to remove support for Borland 5.x,
Metrowerks prior to 9.0, and SunPro prior to 5.7. Compilers based on EDG
238 are also affected, though it is unknown what those are.

Ok to commit?

Thanks,

Steve.