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Author SHA1 Message Date
Eric Fiselier 7dca3127c2 Don't require relops on variant alternatives to all return the same 
type.

Libc++ correctly asserts that a set of visitors for a variant all
return the same type. However, we use the visitation machinary to
perform relational operations. This causes a static assertion when
some of the alternatives relops return a UDT which is implicitly
convertible to bool instead of 'bool' exactly.

llvm-svn: 342560
 2018-09-19 17:53:21 +00:00
Eric Fiselier 0d3d8de014 Implement C++17 <variant>. Patch from Michael Park! 
This patch was reviewed as https://reviews.llvm.org/D23263.

llvm-svn: 288547
 2016-12-02 23:00:05 +00:00
Eric Fiselier 80e66ac1d3 Add <variant> tests but disable them for libc++ 
llvm-svn: 287728
 2016-11-23 01:02:51 +00:00