22 Diagnostics library [diagnostics]

22.2 Exception classes [std.exceptions]

22.2.10 Class underflow_­error [underflow.error]

namespace std {
  class underflow_error : public runtime_error {
  public:
    explicit underflow_error(const string& what_arg);
    explicit underflow_error(const char* what_arg);
  };
}
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The class underflow_­error defines the type of objects thrown as exceptions to report an arithmetic underflow error.

underflow_error(const string& what_arg);

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Effects: Constructs an object of class underflow_­error.

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Postconditions: strcmp(what(), what_­arg.c_­str()) == 0.

underflow_error(const char* what_arg);

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Effects: Constructs an object of class underflow_­error.

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Postconditions: strcmp(what(), what_­arg) == 0.