Function luaK_codecheckglobal

third-party/lua-5.5.0/src/lcode.c:715–722

** Get the value of 'var' in a register and generate an opcode to check ** whether that register is nil. 'k' is the index of the variable name ** in the list of constants. If its value cannot be encoded in Bx, a 0 ** will use '?' for the name. */

** will use '?' for the name.
*/
void luaK_codecheckglobal (FuncState *fs, expdesc *var, int k, int line) {
  luaK_exp2anyreg(fs, var);
  luaK_fixline(fs, line);
  k = (k >= MAXARG_Bx) ? 0 : k + 1;
  luaK_codeABx(fs, OP_ERRNNIL, var->u.info, k);
  luaK_fixline(fs, line);
  freeexp(fs, var);
}


/*