Considering brace initialization is doable, what is the reason behind still having std::make_pair? What are its benefits or advantages?

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There are several benefits and advantages to using std::make_pair instead of brace initialization:

1. Readability: Using std::make_pair makes the code easier to read and understand, as it clearly expresses the intention to create a pair.

2. Type inference: std::make_pair automatically deduces the types of the arguments, which can save typing and reduce the risk of error.

3. Consistency: Using std::make_pair maintains consistency with other STL algorithms and functions that take pairs as arguments. This makes the code more predictable and easier to maintain.

4. Modification: If one of the elements in the pair needs to be modified after its creation, it is not possible with brace initialization, but with std::make_pair, a modifiable lvalue reference can be used.

Overall, while brace initialization may be easier and quicker to write, std::make_pair provides a more consistent, readable, and flexible approach.