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This article introduces the knowledge of "how C++ uses span". In the operation of practical cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

R.14: avoid using the [] parameter and use span instead

Reason (reason)

The array degenerates into pointers, thus losing size information, opening up the possibility of range errors. Use span to provide size information.

Example (sample)

Void f (int []); / / not recommended

Void f (int*); / / not recommended for multiple objects

/ / (a pointer should point to a single object, do not subscript)

Void f (gsl::span); / / good, recommended

Enforcement (implementation recommendations)

Mark the [] parameter. Use the span parameter.

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