Eric Fiselier 06a0febbbd [libcxx] Re-implement LWG 2770 again: Fix tuple_size to work with structured bindings ...

Summary:
This patch attempts to re-implement a fix for LWG 2770, but not the actual specified PR. 

The PR for 2770 specifies tuple_size<T const> as only conditionally providing a `::value` member. However C++17 structured bindings require `tuple_size<T const>` to be complete only if  `tuple_size<T>` is also complete. Therefore this patch implements only provides the specialization `tuple_size<T CV>` iff `tuple_size<T>` is a complete type.

This fixes http://llvm.org/PR31513.

Reviewers: mclow.lists, rsmith, mpark

Subscribers: mpark, cfe-commits

Differential Revision: https://reviews.llvm.org/D28222

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291019 91177308-0d34-0410-b5e6-96231b3b80d8

2017-01-04 22:38:46 +00:00

..

tuple.general

Fix comment typos, strip trailing whitespace. Patch from STL@microsoft.com

2016-06-22 01:23:51 +00:00

tuple.tuple

[libcxx] Re-implement LWG 2770 again: Fix tuple_size to work with structured bindings

2017-01-04 22:38:46 +00:00