public pure virtual member function
<system_error>
virtual const char* name() const noexcept = 0;
Return category name
Return Value
A pointer to the first character of a null-terminated character sequence with the category name.
Example
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// error_category::name
#include <iostream> // std::cout
#include <system_error> // std::error_code
int main() {
std::error_code ec; // the default error code is system error 0
std::cout << ec.category().name() << '\n';
return 0;
}
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Output: