Why is std::make_unique Preferred Over `new` for std::unique_ptr Initialization?

std::make_unique: Advantages over the 'new' Operator for std::unique_ptr Initialization

When initializing a std::unique_ptr, why is std::make_unique(SomeObject(...)) preferred over new SomeObject(...)?

Advantages of std::make_unique

• Promotes Clean Memory Management: std::make_unique adheres to the "never say new/delete" principle, ensuring proper memory deallocation at the end of the unique_ptr's lifetime.
• Improved Type Clarity: make_unique specifies the target type only once, unlike new which requires it twice, reducing the risk of typos.
• Exception Safety: make_unique is implemented with exception safety in mind, regardless of whether the constructor of the pointed-to object throws an exception.
• Simplified Syntax: make_unique provides a concise way to initialize a unique_ptr, reducing code duplication and improving readability.

When to Avoid std::make_unique

While std::make_unique is generally recommended, there are exceptions:

• Custom Deleter Needed: If a custom deleter is required for the unique_ptr, make_unique cannot be used directly.
• Adopting Raw Pointers: When adopting a raw pointer from another source, std::make_unique is not applicable.

In summary, std::make_unique offers improved memory safety, type clarity, and exception safety compared to the 'new' operator for initializing std::unique_ptr objects. It aligns with modern C practices and helps maintain clean and maintainable code.

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