E2084 Parameter names are used only with a function body (C++)

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When declaring a function (not defining it with a function body), you must use either empty parentheses or a function prototype.

A list of parameter names only is not allowed.

Example declarations

int func();             /* declaration without prototype -- OK */
int func(int, int);     /* declaration with prototype -- OK */
int func(int i, int j); /* parameter names in prototype -- OK */
int func(i, j);         /* parameter names only -- ILLEGAL */