19 Diagnostics library [diagnostics]

19.2 Exception classes [std.exceptions]

19.2.6 Class runtime_error [runtime.error]

namespace std {
  class runtime_error : public exception {
  public:
    explicit runtime_error(const string& what_arg);
    explicit runtime_error(const char* what_arg);
  };
}
1

The class runtime_error defines the type of objects thrown as exceptions to report errors presumably detectable only when the program executes.

runtime_error(const string& what_arg);

2

Effects: Constructs an object of class runtime_error.

3

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

runtime_error(const char* what_arg);

4

Effects: Constructs an object of class runtime_error.

5

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