[PATCH] D15421: [Feature] Add a builtin for indexing into parameter packs

[Nathan Wilson via cfe-commits]

Hi Louis,

It would probably be useful to get the lines of context as well by doing a
full diff as describer here: http://llvm.org/docs/Phabricator.html#id3

For example, git diff -U999999 <branch-name>



On Thu, Dec 10, 2015 at 11:32 AM, Louis Dionne via cfe-commits <
cfe-commits at lists.llvm.org> wrote:

> ldionne created this revision.
> ldionne added a reviewer: majnemer.
> ldionne added a subscriber: cfe-commits.
>
> This patch adds a `__nth_element` builtin that allows fetching the n-th
> type of a parameter pack with very little compile-time overhead. The patch
> was inspired by r252036 and r252115 by David Majnemer, which add a similar
> `__make_integer_seq` builtin for efficiently creating a
> `std::integer_sequence`.
>
> http://reviews.llvm.org/D15421
>
> Files:
>   include/clang/AST/ASTContext.h
>   include/clang/AST/DeclTemplate.h
>   include/clang/Basic/Builtins.h
>   include/clang/Basic/DiagnosticSemaKinds.td
>   include/clang/Serialization/ASTBitCodes.h
>   lib/AST/ASTContext.cpp
>   lib/AST/DeclTemplate.cpp
>   lib/Lex/PPMacroExpansion.cpp
>   lib/Sema/SemaLookup.cpp
>   lib/Sema/SemaTemplate.cpp
>   lib/Serialization/ASTReader.cpp
>   lib/Serialization/ASTWriter.cpp
>   test/PCH/nth-element.cpp
>   test/SemaCXX/nth_element.cpp
>
>
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