3 ms·

To be fair, push_back won’t help you here, either.

• MauranKilom 6y ago
  It does, actually. In fact, this is the most concise one (see godbolt link): data.push_back({1, 2.0}); That does not work with emplace_back (not that it would be useful) because the template arguments can't be deduced from the initializer list (whereas for push_back the type is known so you can initialize it with the initializer list).
  • Koshkin 6y ago
    You are correct, the problem is exclusively with emplace_back; incidentally, there is an "official" discussion of this at https://cplusplus.github.io/LWG/issue2089 https://cplusplus.github.io/LWG/issue2089.