[Octave-bug-tracker] [bug #35535] Index-expression parsing issue

[Vladimir]

URL:
  <http://savannah.gnu.org/bugs/?35535>

                 Summary: Index-expression parsing issue
                 Project: GNU Octave
            Submitted by: enargit
            Submitted on: Срд 15 Фев 2012 13:44:55
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.4.3
        Operating System: GNU/Linux

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Details:

Hello!

I am working on Octclipse project (Eclipse-based GUI for Octave). Now my goal
is to reuse octave parser. The idea is to have native C++ code to XML and then
use those XML in Java.

My code is based on Octave's tree_print_code class (pt-pr-code.h /
pt-pr-code.cc) and is very similar. But I encountered a bug in 
tree_print_code.

Consider the following code:


x(1).a = "string1";
x(2).a = "string2";
x(1).q = 1;
x(2).q = 2;
q='a';
x.q
x.(q)


It runs in octave as expected. However, when I try to process it with
tree_print_code, I get the following output:


x (1).a = "string1";
x (2).a = "string2";
x (1).q = 1;
x (2).q = 2;
q = 'a';
x.q
x.


So, argument for dot operation (last line) is lost.

My testing code looks like


  std::string fname = octave_canonicalize_file_name (file_ops::tilde_expand (
      args (0).string_value ()));
  tree_print_code print_code (std::cout);

  octave_function *fcn = load_fcn_from_file (fname, "", "", "", true);
  if (fcn)
  {
    fcn->accept (print_code);
  }


I tried to debug this on myself, but did not manage to find lost argument
"(q)" in parsed octave_function object at all.

Could you fix this issue or suggest a workaround?




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