Editing Refactor C++ code that uses print usage() to resemble m-files

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== Introduction ==


The C++ error handling mechanism in core Octave has been changed to use exceptions.  Previously, calling print_usage() or error() in C++ would always return execution to the calling function.  This made it necessary to explicitly use the return keyword to exit a function, or arrange for an if/else tree in the original function so that normal function execution would not continue in the case of an error.  With exceptions, the C++ code may now be written in a manner that closely resembles Octave's own m-file language.
The principal work for this sprint topic is to convert the C++ code to the new syntax.  In general, this means moving the input validation to the start of the function and logically negating the conditional used to test for an error condition.  For a single condition, the condition itself should be reversed rather than just adding the negation operator '!' to the start of the conditional.  For a test with multiple conditions, use DeMorgan's Law ([https://en.wikipedia.org/wiki/Demorgans_law Demorgan's Law]).  In brief, you will need to negate each individual conditional and then change all && to || or vice versa.
==== Example 1 : Single Conditional (rows() from data.cc) ====
{|
!Before !! After
|-
|<pre>
  octave_value retval;
  if (args.length () == 1)
    retval = args(0).rows ();
  else
    print_usage ();
  return retval;
</pre>
|<pre>
  octave_value retval;
  if (args.length () != 1)
    print_usage ();
  retval = args(0).rows ();
  return retval;
</pre>
|}
==== Example 2 : Multiple Conditional (fopen() from file-io.cc) ====
{|
!Before !! After
|-
|<pre>
  if (nargin > 0 && nargin < 4)
    {
      octave_value mode = (nargin == 2 || nargin == 3)
                          ? args(1) : octave_value ("r");
      octave_value arch = (nargin == 3)
                          ? args(2) : octave_value ("native");
      int fid = -1;
      octave_stream os = do_stream_open (args(0), mode, arch, "fopen", fid);
      if (os)
        {
          retval(1) = "";
          retval(0) = octave_stream_list::insert (os);
        }
      else
        {
          int error_number = 0;
          retval(1) = os.error (false, error_number);
          retval(0) = -1.0;
        }
    }
  else
    print_usage ();
</pre>
|<pre>
  if (nargin < 1 || nargin > 4)
    print_usage ();
  octave_value mode = (nargin == 2 || nargin == 3)
                      ? args(1) : octave_value ("r");
  octave_value arch = (nargin == 3)
                      ? args(2) : octave_value ("native");
  int fid = -1;
  octave_stream os = do_stream_open (args(0), mode, arch, "fopen", fid);
  if (os)
    {
      retval(1) = "";
      retval(0) = octave_stream_list::insert (os);
    }
  else
    {
      int error_number = 0;
      retval(1) = os.error (false, error_number);
      retval(0) = -1.0;
    }
</pre>
|}
==== Example 3 : Redundant return statement ====
{|
!Before !! After
|-
|<pre>
  octave_value_list retval;
  int nargin = args.length ();
  // verify arguments
  if (nargin != 2 && nargin != 4)
    {
      print_usage ();
      return retval;
    }
</pre>
|<pre>
  octave_value_list retval;
  int nargin = args.length ();
  // verify arguments
  if (nargin != 2 && nargin != 4)
    print_usage ();
</pre>
|}
== Detailed Instructions ==
The list of files which contain an instance of print_usage() is shown in the Files section of this page.  The actual instances, including line numbers, are shown in the Instances section.  To avoid duplication, sign up for a particular file by editing the Files section of this wiki page and replacing '???' with your name.  When you have edited a file you should verify that everything is okay by executing
<pre>
make all
./run-octave
test FILENAME
</pre>
When that passes, let a Maintainer know so that we can check in the changes.  Also, add the wiki tags <pre><strike> ... </strike></pre> to the Files section to cross the file off the list.  In addition, increment the number of files that were fixed by +1.


== Files ==
== Files ==
Line 137: Line 5:
Start of Sprint
Start of Sprint


Total: 7
Total: 125


Fixed: 7
Fixed: ???


{| class="wikitable"
{| class="wikitable"
!Owner !! File
!Owner !! File
|-
| <strike> Yu Liu </strike> || <strike> corefcn/syscalls.cc </strike>
|-
| <strike> Rik </strike> || <strike> corefcn/data.cc </strike>
|-
| <strike> mtmx </strike> || <strike> corefcn/file-io.cc </strike>
|-
| <strike> mtmx </strike> || <strike> dldfcn/chol.cc </strike>
|-
| <strike> mtmx </strike> || <strike> dldfcn/qr.cc </strike>
|-
| <strike> Andy </strike> || <strike> dldfcn/audiodevinfo.cc </strike>
|-
| <strike> mtmx </strike> || <strike> octave.cc </strike>
|-
|-
| ??? || octave-value/ov-type-conv.h
|- ??? || corefcn/__contourc__.cc


|}
|}
Line 166: Line 21:
Start of Sprint
Start of Sprint


Total: 83
Total: 562


Fixed: 7
Fixed: ???


<pre>
<pre>
corefcn/syscalls.cc:643:    print_usage ();
octave-value/ov-type-conv.h:102:    print_usage (); \
corefcn/syscalls.cc:662:    print_usage ();
corefcn/__contourc__.cc:325:    print_usage ();
corefcn/syscalls.cc:708:    print_usage ();
corefcn/__dispatch__.cc:103:    print_usage ();
corefcn/syscalls.cc:735:    print_usage ();
corefcn/__dsearchn__.cc:48:      print_usage ();
corefcn/syscalls.cc:816:    print_usage ();
corefcn/__ichol__.cc:206:      print_usage ();
corefcn/syscalls.cc:882:    print_usage ();
corefcn/__ichol__.cc:460:      print_usage ();
corefcn/syscalls.cc:1005:    print_usage ();
corefcn/__ilu__.cc:144:      print_usage ();
corefcn/syscalls.cc:1028:    print_usage ();
corefcn/__ilu__.cc:484:      print_usage ();
corefcn/syscalls.cc:1051:    print_usage ();
corefcn/__ilu__.cc:962:      print_usage ();
corefcn/syscalls.cc:1074:    print_usage ();
corefcn/__lin_interpn__.cc:282:      print_usage ();
corefcn/syscalls.cc:1097:    print_usage ();
corefcn/__qp__.cc:523:    print_usage ();
corefcn/syscalls.cc:1120:    print_usage ();
corefcn/balance.cc:100:      print_usage ();
corefcn/syscalls.cc:1143:    print_usage ();
corefcn/besselj.cc:312:    print_usage ();
corefcn/syscalls.cc:1166:    print_usage ();
corefcn/besselj.cc:452:    print_usage ();
corefcn/syscalls.cc:1182:    print_usage ();
corefcn/besselj.cc:560:    print_usage ();
corefcn/syscalls.cc:1231:    print_usage ();
corefcn/betainc.cc:244:    print_usage ();
corefcn/syscalls.cc:1266:    print_usage ();
corefcn/betainc.cc:405:    print_usage ();
corefcn/syscalls.cc:1347:    print_usage ();
corefcn/bitfcns.cc:361:    print_usage ();
corefcn/syscalls.cc:1369:    print_usage ();
corefcn/bitfcns.cc:648:    print_usage ();
corefcn/syscalls.cc:1413:    print_usage ();
corefcn/bitfcns.cc:688:      print_usage ();
corefcn/syscalls.cc:1437:    print_usage ();
corefcn/bitfcns.cc:747:      print_usage ();
corefcn/syscalls.cc:1463:    print_usage ();
corefcn/bitfcns.cc:818:      print_usage ();
corefcn/syscalls.cc:1488:    print_usage ();
corefcn/bitfcns.cc:861:    print_usage ();
corefcn/syscalls.cc:1512:    print_usage ();
corefcn/bsxfun.cc:340:    print_usage ();
corefcn/syscalls.cc:1534:    print_usage ();
corefcn/cellfun.cc:421:      print_usage ();
corefcn/cellfun.cc:1173:      print_usage ();
corefcn/cellfun.cc:1862:    print_usage ();
corefcn/cellfun.cc:2196:    print_usage ();
corefcn/cellfun.cc:2437:    print_usage ();
corefcn/cellfun.cc:2488:    print_usage ();
corefcn/colloc.cc:52:      print_usage ();
corefcn/conv2.cc:76:      print_usage ();
corefcn/conv2.cc:107:      print_usage ();
corefcn/conv2.cc:118:          print_usage ();
corefcn/conv2.cc:328:      print_usage ();
corefcn/conv2.cc:343:      print_usage ();
corefcn/daspk.cc:465:    print_usage ();
corefcn/dasrt.cc:379:      print_usage ();
corefcn/dassl.cc:467:    print_usage ();
corefcn/data.cc:107:    print_usage (); \
corefcn/data.cc:266:    print_usage ();
corefcn/data.cc:421:    print_usage ();
corefcn/data.cc:556:    print_usage ();
corefcn/data.cc:698:    print_usage ();
corefcn/data.cc:879:    print_usage ();
corefcn/data.cc:1092:    print_usage (); \
corefcn/data.cc:1163:    print_usage (); \
corefcn/data.cc:1316:    print_usage ();
corefcn/data.cc:1401:    print_usage ();
corefcn/data.cc:1602:    print_usage ();
corefcn/data.cc:2130:    print_usage ();
corefcn/data.cc:2427:    print_usage ();
corefcn/data.cc:2597:    print_usage ();
corefcn/data.cc:2671:    print_usage ();
corefcn/data.cc:2698:    print_usage ();
corefcn/data.cc:2758:    print_usage ();
corefcn/data.cc:2844:    print_usage ();
corefcn/data.cc:2896:    print_usage ();
corefcn/data.cc:2917:    print_usage ();
corefcn/data.cc:2934:    print_usage ();
corefcn/data.cc:2951:    print_usage ();
corefcn/data.cc:3110:    print_usage ();
corefcn/data.cc:3233:    print_usage ();
corefcn/data.cc:3269:    print_usage ();
corefcn/data.cc:3286:    print_usage ();
corefcn/data.cc:3305:    print_usage ();
corefcn/data.cc:3579:    print_usage ();
corefcn/data.cc:3599:    print_usage ();
corefcn/data.cc:3617:    print_usage ();
corefcn/data.cc:3642:    print_usage ();
corefcn/data.cc:3675:    print_usage ();
corefcn/data.cc:3717:    print_usage ();
corefcn/data.cc:3757:    print_usage ();
corefcn/data.cc:3807:    print_usage ();
corefcn/data.cc:3856:    print_usage ();
corefcn/data.cc:3904:    print_usage ();
corefcn/data.cc:5104:      print_usage ();
corefcn/data.cc:5199:      print_usage ();
corefcn/data.cc:5386:    print_usage ();
corefcn/data.cc:5509:      print_usage ();
corefcn/data.cc:5563:    print_usage () ;
corefcn/data.cc:5623:    print_usage ();
corefcn/data.cc:5641:    print_usage ();
corefcn/data.cc:5783:    print_usage ();
corefcn/data.cc:5866:    print_usage ();
corefcn/data.cc:5976:    print_usage ();
corefcn/data.cc:5992:      print_usage ();
corefcn/data.cc:6296:      print_usage ();
corefcn/data.cc:6391:    print_usage ();
corefcn/data.cc:6583:      print_usage ();
corefcn/data.cc:6615:          print_usage ();
corefcn/data.cc:6856:      print_usage ();
corefcn/data.cc:6938:      print_usage ();
corefcn/data.cc:7103:    print_usage ();
corefcn/data.cc:7185:    print_usage ();
corefcn/data.cc:7289:    print_usage ();
corefcn/data.cc:7394:    print_usage ();
corefcn/data.cc:7562:    print_usage ();
corefcn/data.cc:7731:    print_usage ();
corefcn/data.cc:7896:    print_usage ();
corefcn/data.cc:7914:    print_usage ();
corefcn/data.cc:8017:    print_usage ();
corefcn/debug.cc:1182:    print_usage ();
corefcn/debug.cc:1389:        print_usage ();
corefcn/debug.cc:1451:        print_usage ();
corefcn/debug.cc:1478:        print_usage ();
corefcn/debug.cc:1498:    print_usage ();
corefcn/debug.cc:1526:    print_usage ();
corefcn/defaults.cc:592:    print_usage ();
corefcn/defaults.cc:616:    print_usage ();
corefcn/defun.cc:51:print_usage (void)
corefcn/defun.cc:55:    print_usage (cur->name ());
corefcn/defun.cc:61:print_usage (const std::string& name)
corefcn/det.cc:73:      print_usage ();
corefcn/dirfns.cc:203:    print_usage ();
corefcn/dirfns.cc:282:    print_usage ();
corefcn/dirfns.cc:354:    print_usage ();
corefcn/dirfns.cc:391:    print_usage ();
corefcn/dirfns.cc:428:    print_usage ();
corefcn/dirfns.cc:468:    print_usage ();
corefcn/dirfns.cc:505:    print_usage ();
corefcn/dirfns.cc:572:    print_usage ();
corefcn/dirfns.cc:638:    print_usage ();
corefcn/dirfns.cc:669:    print_usage ();
corefcn/dirfns.cc:709:    print_usage ();
corefcn/dlmread.cc:207:      print_usage ();
corefcn/dot.cc:130:      print_usage ();
corefcn/dot.cc:304:      print_usage ();
corefcn/eig.cc:59:      print_usage ();
corefcn/ellipj.cc:77:      print_usage ();
corefcn/error.cc:898:    print_usage ();
corefcn/error.cc:1171:    print_usage ();
corefcn/error.cc:1950:    print_usage ();
corefcn/error.cc:1995:    print_usage ();
corefcn/error.cc:2040:    print_usage ();
corefcn/fft.cc:51:      print_usage ();
corefcn/fft2.cc:53:      print_usage ();
corefcn/fftn.cc:52:      print_usage ();
corefcn/file-io.cc:254:    print_usage ();
corefcn/file-io.cc:280:    print_usage ();
corefcn/file-io.cc:324:    print_usage ();
corefcn/file-io.cc:373:    print_usage ();
corefcn/file-io.cc:422:    print_usage ();
corefcn/file-io.cc:466:    print_usage ();
corefcn/file-io.cc:704:    print_usage ();
corefcn/file-io.cc:769:    print_usage ();
corefcn/file-io.cc:810:    print_usage ();
corefcn/file-io.cc:834:    print_usage ();
corefcn/file-io.cc:899:    print_usage ();
corefcn/file-io.cc:953:    print_usage ();
corefcn/file-io.cc:988:    print_usage ();
corefcn/file-io.cc:1013:    print_usage ();
corefcn/file-io.cc:1083:    print_usage ();
corefcn/file-io.cc:1182:        print_usage ();
corefcn/file-io.cc:1285:        print_usage ();
corefcn/file-io.cc:1571:    print_usage ();
corefcn/file-io.cc:1671:    print_usage ();
corefcn/file-io.cc:1699:    print_usage ();
corefcn/file-io.cc:1750:    print_usage ();
corefcn/file-io.cc:1818:    print_usage ();
corefcn/file-io.cc:1839:    print_usage ();
corefcn/file-io.cc:1883:    print_usage ();
corefcn/file-io.cc:1983:    print_usage ();
corefcn/file-io.cc:2066:    print_usage ();
corefcn/file-io.cc:2141:    print_usage ();
corefcn/file-io.cc:2159:    print_usage ();
corefcn/file-io.cc:2184:    print_usage ();
corefcn/file-io.cc:2249:    print_usage ();
corefcn/filter.cc:401:      print_usage ();
corefcn/find.cc:392:      print_usage ();
corefcn/gammainc.cc:99:    print_usage ();
corefcn/gcd.cc:505:    print_usage ();
corefcn/getgrent.cc:89:    print_usage ();
corefcn/getgrent.cc:128:    print_usage ();
corefcn/getgrent.cc:160:    print_usage ();
corefcn/getgrent.cc:187:    print_usage ();
corefcn/getgrent.cc:214:    print_usage ();
corefcn/getpwent.cc:93:    print_usage ();
corefcn/getpwent.cc:132:    print_usage ();
corefcn/getpwent.cc:164:    print_usage ();
corefcn/getpwent.cc:191:    print_usage ();
corefcn/getpwent.cc:218:    print_usage ();
corefcn/givens.cc:83:      print_usage ();
corefcn/graphics.cc:9596:    print_usage ();
corefcn/graphics.cc:9646:    print_usage ();
corefcn/graphics.cc:9669:    print_usage ();
corefcn/graphics.cc:9977:    print_usage ();
corefcn/graphics.cc:10108:    print_usage ();
corefcn/graphics.cc:10180:    print_usage ();
corefcn/graphics.cc:10345:    print_usage ();
corefcn/graphics.cc:10358:    print_usage (); \
corefcn/graphics.cc:10417:    print_usage ();
corefcn/graphics.cc:10580:    print_usage ();
corefcn/graphics.cc:10625:    print_usage ();
corefcn/graphics.cc:10693:    print_usage ();
corefcn/graphics.cc:10727:    print_usage ();
corefcn/graphics.cc:10852:    print_usage ();
corefcn/graphics.cc:11041:        print_usage ();
corefcn/graphics.cc:11113:    print_usage ();
corefcn/graphics.cc:11182:    print_usage ();
corefcn/graphics.cc:11292:    print_usage ();
corefcn/graphics.cc:11683:    print_usage ();
corefcn/graphics.cc:11702:      print_usage ();
corefcn/help.cc:1107:    print_usage ();
corefcn/help.cc:1172:    print_usage ();
corefcn/help.cc:1325:    print_usage ();
corefcn/hess.cc:73:      print_usage ();
corefcn/hex2num.cc:72:    print_usage ();
corefcn/hex2num.cc:225:    print_usage ();
corefcn/input.cc:814:    print_usage ();
corefcn/input.cc:867:    print_usage ();
corefcn/input.cc:950:    print_usage ();
corefcn/input.cc:1013:          print_usage ();
corefcn/input.cc:1029:          print_usage ();
corefcn/input.cc:1034:      print_usage ();
corefcn/input.cc:1165:    print_usage ();
corefcn/input.cc:1211:    print_usage ();
corefcn/input.cc:1231:    print_usage ();
corefcn/input.cc:1288:    print_usage ();
corefcn/input.cc:1326:    print_usage ();
corefcn/input.cc:1483:    print_usage ();
corefcn/input.cc:1503:    print_usage ();
corefcn/inv.cc:67:      print_usage ();
corefcn/kron.cc:280:    print_usage ();
corefcn/load-path.cc:2270:    print_usage ();
corefcn/load-path.cc:2491:    print_usage ();
corefcn/load-path.cc:2549:    print_usage ();
corefcn/load-save.cc:719:          print_usage ();
corefcn/load-save.cc:1624:      print_usage ();
corefcn/load-save.cc:1664:      print_usage ();
corefcn/lookup.cc:247:      print_usage ();
corefcn/lookup.cc:370:    print_usage ();
corefcn/lsode.cc:443:    print_usage ();
corefcn/lu.cc:153:      print_usage ();
corefcn/lu.cc:639:      print_usage ();
corefcn/luinc.cc:105:    print_usage ();
corefcn/mappers.cc:67:    print_usage ();
corefcn/mappers.cc:100:    print_usage ();
corefcn/mappers.cc:149:    print_usage ();
corefcn/mappers.cc:191:    print_usage ();
corefcn/mappers.cc:226:    print_usage ();
corefcn/mappers.cc:265:    print_usage ();
corefcn/mappers.cc:313:    print_usage ();
corefcn/mappers.cc:344:    print_usage ();
corefcn/mappers.cc:379:    print_usage ();
corefcn/mappers.cc:413:    print_usage ();
corefcn/mappers.cc:455:    print_usage ();
corefcn/mappers.cc:496:    print_usage ();
corefcn/mappers.cc:529:    print_usage ();
corefcn/mappers.cc:566:    print_usage ();
corefcn/mappers.cc:617:    print_usage ();
corefcn/mappers.cc:675:    print_usage ();
corefcn/mappers.cc:715:    print_usage ();
corefcn/mappers.cc:757:    print_usage ();
corefcn/mappers.cc:796:    print_usage ();
corefcn/mappers.cc:841:    print_usage ();
corefcn/mappers.cc:881:    print_usage ();
corefcn/mappers.cc:918:    print_usage ();
corefcn/mappers.cc:954:    print_usage ();
corefcn/mappers.cc:990:    print_usage ();
corefcn/mappers.cc:1029:    print_usage ();
corefcn/mappers.cc:1065:    print_usage ();
corefcn/mappers.cc:1117:    print_usage ();
corefcn/mappers.cc:1163:    print_usage ();
corefcn/mappers.cc:1197:    print_usage ();
corefcn/mappers.cc:1229:    print_usage ();
corefcn/mappers.cc:1258:    print_usage ();
corefcn/mappers.cc:1285:    print_usage ();
corefcn/mappers.cc:1314:    print_usage ();
corefcn/mappers.cc:1351:    print_usage ();
corefcn/mappers.cc:1386:    print_usage ();
corefcn/mappers.cc:1414:    print_usage ();
corefcn/mappers.cc:1451:    print_usage ();
corefcn/mappers.cc:1494:    print_usage ();
corefcn/mappers.cc:1529:    print_usage ();
corefcn/mappers.cc:1557:    print_usage ();
corefcn/mappers.cc:1589:    print_usage ();
corefcn/mappers.cc:1617:    print_usage ();
corefcn/mappers.cc:1645:    print_usage ();
corefcn/mappers.cc:1675:    print_usage ();
corefcn/mappers.cc:1729:    print_usage ();
corefcn/mappers.cc:1756:    print_usage ();
corefcn/mappers.cc:1787:    print_usage ();
corefcn/mappers.cc:1811:    print_usage ();
corefcn/mappers.cc:1853:    print_usage ();
corefcn/mappers.cc:1894:    print_usage ();
corefcn/mappers.cc:1957:    print_usage ();
corefcn/mappers.cc:2000:    print_usage ();
corefcn/mappers.cc:2031:    print_usage ();
corefcn/mappers.cc:2066:    print_usage ();
corefcn/mappers.cc:2101:    print_usage ();
corefcn/mappers.cc:2132:    print_usage ();
corefcn/mappers.cc:2167:    print_usage ();
corefcn/mappers.cc:2208:    print_usage ();
corefcn/mappers.cc:2248:    print_usage ();
corefcn/mappers.cc:2310:    print_usage ();
corefcn/matrix_type.cc:126:    print_usage ();
corefcn/max.cc:408:    print_usage ();
corefcn/max.cc:956:    print_usage ();
corefcn/md5sum.cc:53:    print_usage ();
corefcn/mgorth.cc:76:      print_usage ();
corefcn/nproc.cc:58:      print_usage ();
corefcn/ordschur.cc:115:      print_usage ();
corefcn/pager.cc:582:      print_usage ();
corefcn/pager.cc:640:    print_usage ();
corefcn/pinv.cc:63:      print_usage ();
corefcn/pr-output.cc:3433:    print_usage ();
corefcn/pr-output.cc:3529:    print_usage ();
corefcn/pr-output.cc:3575:    print_usage ();
corefcn/profiler.cc:411:          print_usage ();
corefcn/psi.cc:73:      print_usage ();
corefcn/quad.cc:413:    print_usage ();
corefcn/quadcc.cc:1592:      print_usage ();
corefcn/qz.cc:387:      print_usage ();
corefcn/rand.cc:1237:    print_usage ();
corefcn/rcond.cc:53:    print_usage ();
corefcn/regexp.cc:863:    print_usage ();
corefcn/regexp.cc:1158:    print_usage ();
corefcn/regexp.cc:1392:      print_usage ();
corefcn/schur.cc:137:      print_usage ();
corefcn/schur.cc:334:    print_usage ();
corefcn/sighandlers.cc:1064:    print_usage ();
corefcn/sparse.cc:53:      print_usage ();
corefcn/sparse.cc:192:        print_usage ();
corefcn/sparse.cc:280:    print_usage ();
corefcn/sqrtm.cc:221:      print_usage ();
corefcn/str2double.cc:347:    print_usage ();
corefcn/strfind.cc:270:    print_usage ();
corefcn/strfind.cc:453:    print_usage ();
corefcn/strfns.cc:299:    print_usage ();
corefcn/strfns.cc:572:    print_usage ();
corefcn/strfns.cc:695:    print_usage ();
corefcn/strfns.cc:767:    print_usage ();
corefcn/strfns.cc:835:    print_usage ();
corefcn/strfns.cc:886:      print_usage ();
corefcn/sub2ind.cc:89:    print_usage ();
corefcn/sub2ind.cc:193:    print_usage ();
corefcn/svd.cc:132:    print_usage ();
corefcn/sylvester.cc:69:      print_usage ();
corefcn/symtab.cc:1703:    print_usage ();
corefcn/symtab.cc:1804:    print_usage ();
corefcn/symtab.cc:1837:    print_usage ();
corefcn/symtab.cc:1857:    print_usage ();
corefcn/symtab.cc:1877:    print_usage ();
corefcn/syscalls.cc:152:    print_usage ();
corefcn/syscalls.cc:224:    print_usage ();
corefcn/syscalls.cc:343:    print_usage ();
corefcn/syscalls.cc:505:    print_usage ();
corefcn/syscalls.cc:550:    print_usage ();
corefcn/syscalls.cc:576:    print_usage ();
corefcn/syscalls.cc:595:    print_usage ();
corefcn/syscalls.cc:614:    print_usage ();
corefcn/syscalls.cc:633:    print_usage ();
corefcn/syscalls.cc:652:    print_usage ();
corefcn/syscalls.cc:671:    print_usage ();
corefcn/syscalls.cc:690:    print_usage ();
corefcn/syscalls.cc:736:    print_usage ();
corefcn/syscalls.cc:763:    print_usage ();
corefcn/syscalls.cc:844:    print_usage ();
corefcn/syscalls.cc:910:    print_usage ();
corefcn/syscalls.cc:1033:    print_usage ();
corefcn/syscalls.cc:1056:    print_usage ();
corefcn/syscalls.cc:1079:    print_usage ();
corefcn/syscalls.cc:1102:    print_usage ();
corefcn/syscalls.cc:1125:    print_usage ();
corefcn/syscalls.cc:1148:    print_usage ();
corefcn/syscalls.cc:1171:    print_usage ();
corefcn/syscalls.cc:1194:    print_usage ();
corefcn/syscalls.cc:1210:    print_usage ();
corefcn/syscalls.cc:1259:    print_usage ();
corefcn/syscalls.cc:1294:    print_usage ();
corefcn/syscalls.cc:1375:    print_usage ();
corefcn/syscalls.cc:1397:    print_usage ();
corefcn/syscalls.cc:1441:    print_usage ();
corefcn/syscalls.cc:1465:    print_usage ();
corefcn/syscalls.cc:1491:    print_usage ();
corefcn/syscalls.cc:1516:    print_usage ();
corefcn/syscalls.cc:1540:    print_usage ();
corefcn/syscalls.cc:1562:    print_usage ();
corefcn/syscalls.cc:1562:    print_usage ();
corefcn/syscalls.cc:1577:    print_usage ();
corefcn/syscalls.cc:1590:    print_usage ();
*corefcn/data.cc:2414:    print_usage ();
corefcn/syscalls.cc:1605:    print_usage ();
*corefcn/data.cc:2584:    print_usage ();
corefcn/sysdep.cc:216:    print_usage ();
*corefcn/data.cc:2737:    print_usage ();
corefcn/sysdep.cc:628:    print_usage ();
*corefcn/data.cc:2823:    print_usage ();
corefcn/sysdep.cc:664:    print_usage ();
*corefcn/data.cc:7805:    print_usage ();
corefcn/sysdep.cc:700:    print_usage ();
*corefcn/data.cc:7823:    print_usage ();
corefcn/sysdep.cc:790:      print_usage ();
*corefcn/data.cc:7926:    print_usage ();
corefcn/sysdep.cc:852:    print_usage ();
corefcn/file-io.cc:684:    print_usage ();
corefcn/sysdep.cc:896:    print_usage ();
dldfcn/chol.cc:695:    print_usage ();
corefcn/sysdep.cc:992:    print_usage ();
dldfcn/chol.cc:881:    print_usage ();
corefcn/time.cc:122:    print_usage ();
dldfcn/chol.cc:1110:    print_usage ();
corefcn/time.cc:172:    print_usage ();
dldfcn/chol.cc:1249:    print_usage ();
corefcn/time.cc:233:    print_usage ();
dldfcn/qr.cc:1069:    print_usage ();
corefcn/time.cc:285:    print_usage ();
dldfcn/qr.cc:1271:    print_usage ();
corefcn/time.cc:478:    print_usage ();
/* These should possibly be using error rather than print_usage.
corefcn/time.cc:522:    print_usage ();
   They are internal functions and print_usage() will print nothing valuable */  
corefcn/toplev.cc:1137:    print_usage ();
corefcn/toplev.cc:1244:    print_usage ();
corefcn/toplev.cc:1543:    print_usage ();
corefcn/tril.cc:208:    print_usage ();
corefcn/tsearch.cc:79:      print_usage ();
corefcn/typecast.cc:260:    print_usage ();
corefcn/typecast.cc:341:    print_usage ();
corefcn/typecast.cc:497:    print_usage ();
corefcn/urlwrite.cc:344:      print_usage ();
corefcn/urlwrite.cc:481:      print_usage ();
corefcn/urlwrite.cc:550:      print_usage ();
corefcn/utils.cc:107:    print_usage ();
corefcn/utils.cc:339:    print_usage ();
corefcn/utils.cc:419:    print_usage ();
corefcn/utils.cc:764:    print_usage ();
corefcn/utils.cc:907:    print_usage ();
corefcn/utils.cc:947:    print_usage ();
corefcn/utils.cc:972:    print_usage ();
corefcn/utils.cc:1003:    print_usage ();
corefcn/utils.cc:1048:    print_usage ();
corefcn/utils.cc:1105:    print_usage ();
corefcn/utils.cc:1137:    print_usage ();
corefcn/utils.cc:1435:    print_usage ();
corefcn/utils.cc:1576:    print_usage ();
corefcn/variables.cc:335:      print_usage ();
corefcn/variables.cc:615:    print_usage ();
corefcn/variables.cc:794:    print_usage ();
corefcn/variables.cc:836:    print_usage ();
corefcn/variables.cc:872:    print_usage ();
corefcn/variables.cc:907:    print_usage ();
corefcn/variables.cc:939:    print_usage ();
corefcn/variables.cc:982:    print_usage ();
corefcn/variables.cc:1858:    print_usage ();
corefcn/variables.cc:1938:    print_usage ();
corefcn/variables.cc:2041:    print_usage ();
corefcn/variables.cc:2074:    print_usage ();
corefcn/variables.cc:2108:    print_usage ();
corefcn/variables.cc:2330:          print_usage (); \
corefcn/variables.cc:2670:    print_usage ();
dldfcn/__delaunayn__.cc:102:    print_usage ();
dldfcn/__eigs__.cc:198:    print_usage ();
dldfcn/__glpk__.cc:352:    print_usage ();
dldfcn/__magick_read__.cc:765:    print_usage ();
dldfcn/__magick_read__.cc:1414:    print_usage ();
dldfcn/__magick_read__.cc:1593:    print_usage ();
dldfcn/__magick_read__.cc:1814:    print_usage ();
dldfcn/__magick_read__.cc:2261:    print_usage ();
dldfcn/__osmesa_print__.cc:99:    print_usage ();
dldfcn/__voronoi__.cc:98:   print_usage ();
dldfcn/amd.cc:93:    print_usage ();
dldfcn/audiodevinfo.cc:2010:    print_usage ();
dldfcn/audiodevinfo.cc:2010:    print_usage ();
dldfcn/audiodevinfo.cc:2038:        print_usage ();
dldfcn/audiodevinfo.cc:2038:        print_usage ();
Line 251: Line 508:
dldfcn/audiodevinfo.cc:3117:        print_usage ();
dldfcn/audiodevinfo.cc:3117:        print_usage ();
dldfcn/audiodevinfo.cc:3146:        print_usage ();
dldfcn/audiodevinfo.cc:3146:        print_usage ();
dldfcn/audioread.cc:80:    print_usage ();
dldfcn/audioread.cc:285:    print_usage ();
dldfcn/audioread.cc:470:    print_usage ();
dldfcn/chol.cc:157:    print_usage ();
dldfcn/chol.cc:356:    print_usage ();
dldfcn/chol.cc:487:    print_usage ();
dldfcn/chol.cc:592:    print_usage ();
dldfcn/chol.cc:695:    print_usage ();
dldfcn/chol.cc:791:    print_usage ();
dldfcn/chol.cc:881:    print_usage ();
dldfcn/chol.cc:1038:    print_usage ();
dldfcn/chol.cc:1110:    print_usage ();
dldfcn/chol.cc:1172:    print_usage ();
dldfcn/chol.cc:1249:    print_usage ();
dldfcn/colamd.cc:289:    print_usage ();
dldfcn/colamd.cc:524:    print_usage ();
dldfcn/colamd.cc:667:    print_usage ();
dldfcn/convhulln.cc:116:    print_usage ();
dldfcn/dmperm.cc:160:    print_usage ();
dldfcn/dmperm.cc:206:    print_usage ();
dldfcn/fftw.cc:140:    print_usage ();
dldfcn/qr.cc:207:    print_usage ();
dldfcn/qr.cc:763:    print_usage ();
dldfcn/qr.cc:948:    print_usage ();
dldfcn/qr.cc:1069:    print_usage ();
dldfcn/qr.cc:1164:    print_usage ();
dldfcn/qr.cc:1271:    print_usage ();
dldfcn/qr.cc:1413:    print_usage ();
dldfcn/symbfact.cc:103:    print_usage ();
dldfcn/symrcm.cc:444:    print_usage ();
octave-value/ov-bool-mat.cc:593:    print_usage ();
octave-value/ov-cell.cc:1245:    print_usage ();
octave-value/ov-cell.cc:1314:    print_usage ();
octave-value/ov-cell.cc:1355:    print_usage ();
octave-value/ov-cell.cc:1435:    print_usage ();
octave-value/ov-class.cc:1778:    print_usage ();
octave-value/ov-class.cc:1870:      print_usage ();
octave-value/ov-class.cc:1968:    print_usage ();
octave-value/ov-class.cc:1985:    print_usage ();
octave-value/ov-class.cc:2022:    print_usage ();
octave-value/ov-classdef.cc:3818:    print_usage ();
octave-value/ov-classdef.cc:3853:    print_usage ();
octave-value/ov-classdef.cc:3873:    print_usage ();
octave-value/ov-fcn-handle.cc:1798:    print_usage ();
octave-value/ov-fcn-handle.cc:1836:    print_usage ();
octave-value/ov-fcn-handle.cc:1872:    print_usage ();
octave-value/ov-fcn-handle.cc:1923:    print_usage ();
octave-value/ov-fcn-inline.cc:822:    print_usage ();
octave-value/ov-fcn-inline.cc:868:    print_usage ();
octave-value/ov-fcn-inline.cc:914:    print_usage ();
octave-value/ov-fcn-inline.cc:1004:    print_usage ();
octave-value/ov-flt-re-mat.cc:898:    print_usage ();
octave-value/ov-java.cc:2156:    print_usage ();
octave-value/ov-java.cc:2233:    print_usage ();
octave-value/ov-java.cc:2301:    print_usage ();
octave-value/ov-java.cc:2363:    print_usage ();
octave-value/ov-java.cc:2396:    print_usage ();
octave-value/ov-java.cc:2489:    print_usage ();
octave-value/ov-null-mat.cc:124:    print_usage ();
octave-value/ov-oncleanup.cc:194:    print_usage ();
octave-value/ov-re-mat.cc:1033:    print_usage ();
octave-value/ov-struct.cc:1859:    print_usage ();
octave-value/ov-struct.cc:1947:    print_usage ();
octave-value/ov-struct.cc:1968:    print_usage ();
octave-value/ov-struct.cc:2093:    print_usage ();
octave-value/ov-struct.cc:2160:    print_usage ();
octave-value/ov-typeinfo.cc:633:    print_usage ();
octave-value/ov-usr-fcn.cc:880:    print_usage ();
octave-value/ov-usr-fcn.cc:1016:    print_usage ();
octave-value/ov-usr-fcn.cc:1115:    print_usage ();
octave-value/ov.cc:2935:    print_usage ();
octave-value/ov.cc:3066:    print_usage ();
octave-value/ov.cc:3129:    print_usage ();
octave-value/ov.cc:3213:    print_usage ();
octave-value/ov.cc:3240:    print_usage ();
octave.cc:240:    print_usage ();
octave.cc:240:    print_usage ();
octave.cc:1022:    print_usage ();
octave.cc:1022:    print_usage ();
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