Destructs astd::ctype facet. This destructor is protected and virtual (due tobase class destructor being virtual). An object of typestd::ctype, like most facets, can only be destroyed when the laststd::locale object that implements this facet goes out of scope or if a user-defined class is derived fromstd::ctype and implements a public destructor.

[edit]Example

#include <iostream>#include <locale> struct Destructible_ctype:publicstd::ctype<wchar_t>{    Destructible_ctype(std::size_t refs=0): ctype(refs){}// note: the implicit destructor is public}; int main(){    Destructible_ctype dc;// std::ctype<wchar_t> c; // compile error: protected destructor}

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