[cfe-commits] [Patch] Documentation update: use __has_feature(__cxx_decltype__) to detect N3276 decltype

[Michel Morin]

This patch updates documentation of feature checking macros
to describe __has_feature(__cxx_decltype__) can be used to detect
the C++11 decltype (N3276) support.

N3276 decltype was implemented in r151117 (am I right?), and
"feature names with double underscores" was implemented in r151445.
So, __has_feature(__cxx_decltype__) can be used to detect N3276 decltype.

This patch also updates the "C++11 implementation status" page.


Michel
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