Add C++17-like emplace.back() for arrays.

[TrueWodzu]

Hi,

in C++17 there is a change in return value of std::vector::emplace_back(); Would it be possible to add this in library, so I could do something like this:

json json_obj;
json_obj["Type"] = 1;
json_obj["Version"] = 1;
json_obj["Documents"] = json::array();
auto document = json_obj["Documents"].emplace_back(); // Currently returns error.

[nlohmann]

That sounds doable!

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[nlohmann]

@TrueWodzu I extended emplace_back to return a reference (see 1be6343). Is this what you had in mind?

[TrueWodzu]

Yes, exactly. Thank you :)

[nlohmann]

I reopened the issue, because the change has not yet been merged to the develop branch.

[TrueWodzu]

That's fine, you the boss ;)

[nlohmann]

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🔖 Release item

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Type

• ✨ New Feature
• 🐛 Bug Fix
• ⚡️ Improvement
• 🔨 Further Change
• 🔥 Deprecated function

Description

• Added return value for emplace_back function, returning a reference to the added element. Add C++17-like emplace.back() for arrays. #1609

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