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gdbsupport: use result_of_t instead of result_of in parallel-for.h

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When building with -std=c++11, I get:

In file included from /home/smarchi/src/binutils-gdb/gdb/unittests/parallel-for-selftests.c:22:                                                                             /home/smarchi/src/binutils-gdb/gdb/../gdbsupport/parallel-for.h:134:10: error: ‘result_of_t’ is not a member of ‘std’; did you mean ‘result_of’?
  134 |     std::result_of_t<RangeFunction (RandomIt, RandomIt)>
      |          ^~~~~~~~~~~
      |          result_of

This is because result_of_t has been introduced in C++14.  Use the
equivalent result_of<...>::type instead.

result_of and result_of_t have been removed in C++20 though, so I think
we'll need some patches eventually to make the code use invoke_result
instead, depending on the C++ version.

Change-Id: I4817f361c0ebcdd4b32976898fc368bb302b61b9
This commit is contained in:
Simon Marchi 2022-04-12 12:30:08 -04:00
parent 8dddb06c59
commit a09520cdd9
1 changed files with 3 additions and 3 deletions
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6
gdbsupport/parallel-for.h
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@ -131,13 +131,13 @@ private:
template<class RandomIt, class RangeFunction>
typename gdb::detail::par_for_accumulator<
std::result_of_t<RangeFunction (RandomIt, RandomIt)>
typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type
>::result_type
parallel_for_each (unsigned n, RandomIt first, RandomIt last,
RangeFunction callback)
{
typedef typename std::result_of_t<RangeFunction (RandomIt, RandomIt)>
result_type;
using result_type
= typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type;
size_t n_threads = thread_pool::g_thread_pool->thread_count ();
size_t n_elements = last - first;