[Octave-bug-tracker] [bug #56419] Implementation of newline

[Guillaume]

URL:
  <https://savannah.gnu.org/bugs/?56419>

                 Summary: Implementation of newline
                 Project: GNU Octave
            Submitted by: gyom
            Submitted on: Thu 30 May 2019 11:23:41 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: Guillaume
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

Matlab introduced a newline function that returns "\n":

https://www.mathworks.com/help/matlab/ref/newline.html

Here is a possible implementation (with much help from IRC):


diff -r 3d9e72cac668 libinterp/corefcn/strfns.cc
--- a/libinterp/corefcn/strfns.cc       Wed May 29 03:28:05 2019 +0000
+++ b/libinterp/corefcn/strfns.cc       Thu May 30 10:54:46 2019 +0100
@@ -45,6 +45,31 @@
 
 #include "oct-string.h"
 
+DEFUN (newline, args, nargout,
+       doc: /* -*- texinfo -*-
address@hidden {} {} newline ()
+Return the character corresponding to a newline.
+
+This is equivalent to @code{"\n"}.
+
address@hidden, char}
address@hidden deftypefn */)
+{
+  if ((args.length () != 0) || (nargout > 1))
+    print_usage ();
+
+  static octave_value_list retval = ovl ("\n");
+  
+  return retval;
+}
+
+/*
+%!assert (newline (), "\n")
+
+%!error newline (1)
+%!error [a, b] = newline ()
+*/
+
 DEFUN (char, args, ,
        doc: /* -*- texinfo -*-
 @deftypefn  {} {} char (@var{x})






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