Why QVector::contains expects pointer to non-const TYPE as its parameter?

This is actually a quite interesting question about const-correctness and some non-intuitive errors, but the compiler is right in rejecting the code.

Explicit template instantiation is done for concrete types, and you can be certain standard library vendor had no idea you'd write TYPE. That aside, the difference is in signatures. Std::find is a free function template, something like.

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