[Octave-bug-tracker] [bug #35436] Private function strange behaviour

[RPS]

URL:
  <http://savannah.gnu.org/bugs/?35436>

                 Summary: Private function strange behaviour
                 Project: GNU Octave
            Submitted by: ryanst
            Submitted on: Thu 02 Feb 2012 01:26:09 PM GMT
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: ryanst
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.4.3
        Operating System: Microsoft Windows

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Details:

Private function behaviour seems strange - the private function does not
always override the built-in function.  I've added an example to replicate the
problem:

place the following function (test.m) in the test folder:


function test()
while 1
  res=sin(pi)
  m=menu('test', 'option1', 'option2')
  pause;
end


Then add the following two functions under {working folder}/private:

menu.m

function choice = menu(header, varargin)
varargin
choice = input(strcat(header, ' '))
end


sin.m

function res = sin(angle)
res = 'thundercougarfalconbird';
end


Run 'test'.  The output is as follows:


octave:6> test
res = thundercougarfalconbird
varargin =
{
  [1,1] = option1
  [1,2] = option2
}
test1
choice =  1
m =  1
res = thundercougarfalconbird
test

  [ 1] option1
  [ 2] option2

pick a number, any number: 1
m =  1
res = thundercougarfalconbird
test

  [ 1] option1
  [ 2] option2

pick a number, any number:


In short, the private sin.m function always gets used while the menu.m
function only gets used the first time.  This occurs in both 3.4.3 under
Windows XP and Linux (Ubuntu 11.10 in this case, the 3.4.3 version I
compiled).  This works properly when run in MATLAB (R2011b):



>> test

res =

thundercougarfalconbird


varargin = 

    'option1'    'option2'

test

choice =

     []


m =

     []


res =

thundercougarfalconbird


varargin = 

    'option1'    'option2'

test

choice =

     []


m =

     []





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