Please add an analogue of emplace - Githubissues

Naios / function2

Improved and configurable drop-in replacement to std::function that supports move only types, multiple overloads and more

http://naios.github.io/function2

Boost Software License 1.0

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Please add an analogue of emplace #31

Open adamemerson opened 4 years ago

adamemerson commented 4 years ago

@Naios

Being able to construct an object rather than having to copy/move one in would be very useful, particularly for objects that may be expensive to construct, or (for unique_function) immovable objects. (After all, if they're on the heap we can still move the pointer.)

Commit Hash

7cd95374b0f1c941892bfc40f0ebb6564d33fdb9

Expected Behavior

Being able to type something like fun.emplace<Foo>(something, something)

Actual Behavior

Needing to type fun = Foo(something, something)

Steps to Reproduce

N/A

Your Environment

OS: Fedora 30
Compiler and version: GCC 9.2.1
Standard library (if non default): libstdc++-9.2.1

Naios commented 4 years ago

This sounds like a promising feature. Probably I will implement it in the future.