+ if (SvPOK(TOPs) && SvCUR(TOPs) >= 7) {
+ char *s = SvPVX(TOPs);
+ if (strnEQ(s, "CORE::", 6)) {
+ int code;
+
+ code = keyword(s + 6, SvCUR(TOPs) - 6);
+ if (code < 0) { /* Overridable. */
+#define MAX_ARGS_OP ((sizeof(I32) - 1) * 2)
+ int i = 0, n = 0, seen_question = 0;
+ I32 oa;
+ char str[ MAX_ARGS_OP * 2 + 2 ]; /* One ';', one '\0' */
+
+ while (i < MAXO) { /* The slow way. */
+ if (strEQ(s + 6, op_name[i]) || strEQ(s + 6, op_desc[i]))
+ goto found;
+ i++;
+ }
+ goto nonesuch; /* Should not happen... */
+ found:
+ oa = opargs[i] >> OASHIFT;
+ while (oa) {
+ if (oa & OA_OPTIONAL) {
+ seen_question = 1;
+ str[n++] = ';';
+ } else if (seen_question)
+ goto set; /* XXXX system, exec */
+ if ((oa & (OA_OPTIONAL - 1)) >= OA_AVREF
+ && (oa & (OA_OPTIONAL - 1)) <= OA_HVREF) {
+ str[n++] = '\\';
+ }
+ /* What to do with R ((un)tie, tied, (sys)read, recv)? */
+ str[n++] = ("?$@@%&*$")[oa & (OA_OPTIONAL - 1)];
+ oa = oa >> 4;
+ }
+ str[n++] = '\0';
+ ret = sv_2mortal(newSVpv(str, n - 1));
+ } else if (code) /* Non-Overridable */
+ goto set;
+ else { /* None such */
+ nonesuch:
+ croak("Cannot find an opnumber for \"%s\"", s+6);
+ }
+ }
+ }