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Avoiding std::enable_if in Function Parameters
Using std::enable_if in function parameters introduces complexity and can make code difficult to read. It also complicates template argument deduction and can lead to unexpected behavior.
Solution: Define overloaded functions for each desired behavior, using sfinae to select the appropriate function.
std::enable_if as Template Parameter
Preferring std::enable_if as a template parameter provides several advantages:
std::enable_if as Return Type
While using std::enable_if as a return type is technically possible, it's not ideal due to the following:
Differences for Member and Non-Member Function Templates
The same principles apply to both member and non-member function templates. However, member function templates may have additional considerations, such as the accessibility of private or protected members.
Recommendation
Follow the guideline of "Put the hack in the template parameters." By placing std::enable_if on template parameters, you enhance readability, ensure universal applicability, and simplify template argument deduction.
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