private IRubyObject op_arefCommon(IRubyObject idx) {
if (idx instanceof RubyFixnum) {
int num = RubyNumeric.fix2int(idx);
if (num >= 0) return RubyRegexp.nth_match(num, this);
} else {
if (idx instanceof RubySymbol) {
return RubyRegexp.nth_match(
nameToBackrefNumber((RubyString) ((RubySymbol) idx).id2name()), this);
} else if (idx instanceof RubyString) {
return RubyRegexp.nth_match(nameToBackrefNumber((RubyString) idx), this);
}
}
return null;
}
/** match_aref */
@JRubyMethod(name = "[]")
public IRubyObject op_aref(IRubyObject idx, IRubyObject rest) {
if (!rest.isNil() || !(idx instanceof RubyFixnum) || ((RubyFixnum) idx).getLongValue() < 0) {
return ((RubyArray) to_a()).aref(idx, rest);
}
return RubyRegexp.nth_match(RubyNumeric.fix2int(idx), this);
}
// This returns a list of values in the order the names are defined (named capture local var
// feature uses this).
public IRubyObject[] getNamedBackrefValues(Ruby runtime) {
if (pattern.numberOfNames() == 0) return NULL_ARRAY;
IRubyObject[] values = new IRubyObject[pattern.numberOfNames()];
int j = 0;
for (Iterator<NameEntry> i = pattern.namedBackrefIterator(); i.hasNext(); ) {
NameEntry e = i.next();
int[] refs = e.getBackRefs();
int length = refs.length;
values[j++] = length == 0 ? runtime.getNil() : RubyRegexp.nth_match(refs[length - 1], this);
}
return values;
}
@JRubyMethod(name = "inspect")
@Override
public IRubyObject inspect() {
if (str == null) return anyToString();
Ruby runtime = getRuntime();
RubyString result = runtime.newString();
result.cat((byte) '#').cat((byte) '<');
result.append(getMetaClass().getRealClass().to_s());
NameEntry[] names = new NameEntry[regs == null ? 1 : regs.numRegs];
if (pattern.numberOfNames() > 0) {
for (Iterator<NameEntry> i = pattern.namedBackrefIterator(); i.hasNext(); ) {
NameEntry e = i.next();
for (int num : e.getBackRefs()) names[num] = e;
}
}
for (int i = 0; i < names.length; i++) {
result.cat((byte) ' ');
if (i > 0) {
NameEntry e = names[i];
if (e != null) {
result.cat(e.name, e.nameP, e.nameEnd - e.nameP);
} else {
result.cat((byte) ('0' + i));
}
result.cat((byte) ':');
}
IRubyObject v = RubyRegexp.nth_match(i, this);
if (v.isNil()) {
result.cat("nil".getBytes());
} else {
result.append(((RubyString) v).inspectCommon(runtime.is1_9()));
}
}
return result.cat((byte) '>');
}
public IRubyObject group(int n) {
return RubyRegexp.nth_match(n, this);
}
public IRubyObject group(long n) {
return RubyRegexp.nth_match((int) n, this);
}
