Function exp2RK

lib/lua/src/lcode.c:1029–1036

** Ensures final expression result is in a valid R/K index ** (that is, it is either in a register or in 'k' with an index ** in the range of R/K indices). ** Returns 1 iff expression is K. */

** Returns 1 iff expression is K.
*/
static int exp2RK (FuncState *fs, expdesc *e) {
  if (luaK_exp2K(fs, e))
    return 1;
  else {  /* not a constant in the right range: put it in a register */
    luaK_exp2anyreg(fs, e);
    return 0;
  }
}


static void codeABRK (FuncState *fs, OpCode o, int a, int b,