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Clarify why we cannot have nice things

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Victor Zverovich 2019-06-04 08:47:25 -07:00
parent 5bafcb437b
commit 7893d85394
1 changed files with 2 additions and 0 deletions
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include/fmt/core.h
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@ -1381,6 +1381,8 @@ struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
: is_contiguous<Container> {}; : is_contiguous<Container> {};
/** Formats a string and writes the output to ``out``. */ /** Formats a string and writes the output to ``out``. */
// GCC 8 and earlier cannot handle std::back_insert_iterator<Container> with
// vformat_to<ArgFormatter>(...) overload, so SFINAE on iterator type instead.
template <typename OutputIt, typename S, typename Char = char_t<S>, template <typename OutputIt, typename S, typename Char = char_t<S>,
FMT_ENABLE_IF(is_contiguous_back_insert_iterator<OutputIt>::value)> FMT_ENABLE_IF(is_contiguous_back_insert_iterator<OutputIt>::value)>
OutputIt vformat_to(OutputIt out, const S& format_str, OutputIt vformat_to(OutputIt out, const S& format_str,