[PATCH] D123909: [Clang] Use of decltype(capture) in parameter-declaration-clause

[Haojian Wu via Phabricator via cfe-commits]

hokein added a comment.

Hi, this patch seems to break the following code which was previously compiled:

  #include <type_traits>
  #include <algorithm>
  #include <numeric>
  
  template <typename It, typename MapFn>
  auto MapJoin(It first, It last, MapFn map_fn) {
    return std::accumulate(
        first, last, map_fn(*first),
        [=](typename std::result_of<MapFn(decltype(*first))>::type result) {  }); // a new diagnostic: error: captured variable 'first' cannot appear here
  }


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D123909/new/

https://reviews.llvm.org/D123909