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Move lambda out of unevaluated context

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This commit is contained in:
mandreyel 2018-09-10 10:02:38 +02:00
parent ebb3c03293
commit 6b5334c167
2 changed files with 14 additions and 8 deletions
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11
include/nlohmann/detail/input/input_adapters.hpp
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@ -320,15 +320,18 @@ class input_adapter
int>::type = 0>
input_adapter(IteratorType first, IteratorType last)
{
#ifndef NDEBUG
// assertion to check that the iterator range is indeed contiguous,
// see http://stackoverflow.com/a/35008842/266378 for more discussion
assert(std::accumulate(
first, last, std::pair<bool, int>(true, 0),
[&first](std::pair<bool, int> res, decltype(*first) val)
const auto is_contiguous = std::accumulate(
first, last, std::pair<bool, int>(true, 0),
[&first](std::pair<bool, int> res, decltype(*first) val)
{
res.first &= (val == *(std::next(std::addressof(*first), res.second++)));
return res;
}).first);
}).first;
assert(is_contiguous);
#endif
// assertion to check that each element is 1 byte long
static_assert(