Is it safe to set an empty default value for the std::string_view?
void func(std::string_view arg = {} )
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2Why do you think it wouldn't be "safe"? What does "safe" mean? – Sam Varshavchik Sep 06 '22 at 11:37
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Yes it's safe. But in case you try to access its characters using operator [] or stuff like .begin() then it's not safe. – digito_evo Sep 06 '22 at 11:42
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why would .begin() not be safe? deferencing it wouldnt be safe – Yamahari Sep 06 '22 at 11:43
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2Safe, in itself, yes - in general? Depends on what you do with it afterwards. – Jesper Juhl Sep 06 '22 at 11:49
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The first thing I will do with it is check for emptiness. By the safe, I meant that string_view is not owning string – Hardwired Sep 07 '22 at 16:23
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It's allowed to create an empty std::string_view the same way it's allowed to create an empty std::string for example.
Of course, if your function intends to do some direct access operations (for example std::string_view::front() or std::string_view::back()), in that case, it will be necessary to check if the std::string_view is not empty beforehand (std::string_view::empty()).
Fareanor
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