/* Process 1st operand 'v' of binary operation 'op' before reading 2nd operand.  */
void luaK_infix(FuncState *fs, BinOpr op, expdesc *v)
/* Process 1st operand 'v' of binary operation 'op' before reading 2nd operand.  */
void luaK_infix(FuncState *fs, BinOpr op, expdesc *v)
{
    case OPR_AND: {
      luaK_goiftrue(fs, v);
      break;
    }
    case OPR_OR: {
      luaK_goiffalse(fs, v);
      break;
    }
    case OPR_CONCAT: {
      luaK_exp2nextreg(fs, v);
      break;
    }
    case OPR_ADD: case OPR_SUB:
    case OPR_MUL: case OPR_DIV: case OPR_IDIV:
    case OPR_MOD: case OPR_POW:
    case OPR_BAND: case OPR_BOR: case OPR_BXOR:
    case OPR_SHL: case OPR_SHR: {
      if (!tonumeral(v, NULL))
        luaK_exp2RK(fs, v);
      break;
    }
    default: {
      luaK_exp2RK(fs, v);
      break;
    }
  }
}