[Octave-bug-tracker] [bug #38149] regexp doesn't return empty tokens -- they just disappear

[Michael Godfrey]

Follow-up Comment #10, bug #38149 (project octave):

Oops.  I cut and pasted from email. 
Here is try from savannah
(with TE{:} at the end -- did not help)

>> [T, TE, NM] = regexp (sprintf('%s','John DavisnRogers, James'),
'(?<first>w+)s+(?<last>w+)|(?<last>w+),s+(?<first>w+)', 'tokens',
'tokenExtents', 'names');
>> disp (T)
    {1x2 cell}    {1x2 cell}

>> disp (TE)
    [2x2 double]    [2x2 double]

>> disp (NM)
1x2 struct array with fields:
    last
    first

>> 
>> te = regexp ('abce', '((a)(z)?b(c)(z*))(z)?(e)?', 'tokenExtents');
>> disp (te)
    [3x2 double]

>> 
>> [S, E, TE, M, T, NM, SP] = regexp ('abc',
'(?<all>(a)(?<miss1>z?)b(?<hit1>c)(z*))')

S =

     []


E =

     []


TE = 

     {}


M = 

     {}


T = 

     {}


NM = 

0x0 struct array with fields:
    all


SP = 

    'abc'

>> 
>> disp (TE)
>> disp (T)
>> disp (NM)
>> 
>> TE{:}
>> 


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