MCNP cell: fill -1:1 acceptable as fill = -1:1

[gvozdila]

Now cell string :
fill -1:1

makes an error like this:

File "/home/krom/.local/lib/python3.6/site-packages/csg2csg/MCNPCellCard.py", line 191, in __get_keyword_value
result = regex.search(string)[0]
TypeError: 'NoneType' object is not subscriptable

fill = -1:1 - is ok.
But MCNP accept any fill sting, fill -1:1 as acceptable as fill = -1:1

[gvozdila]

Thank you for you work!

[makeclean]

Thanks for the issue @gvozdila, I've put very little effort into lattices so this may well fit into that category - I will work on a fix. Do you have an example input that you could share?

[py1sl]

i'll add this as a case for the refactoring of cell keyword handling i have been planning to do to fix #38 and related issues, but feel free to add a fix in the meantime

[gvozdila]

It could be an example of square lattice in 2 directions.

c lattice example
1 1 1.1111 -10 u=1 imp:n=1 $ u1 for lattice
2 2 2.2222 -10 u=2 imp:n=1 $ u2 for lattice
3 0 -1 2 -3 4 u=3 imp:n=1 fill -1:1 -1:1 1 2 1 1 2 1 1 2 1 $ lattice cell filled with u=1 and u=2
4 0 -21 22 -23 24 -30 40 u=0 fill=3 imp:n=1
5 0 21:-22:23:-24:30:-40 u=0 imp:n=0 $ void

10 cz 20 $ big cylinder, it is surely bigger than lattice cell, so no unfilled space left
1 px 2.5 $ lattice cell boundary
2 px -2.5 $ lattice cell boundary
3 py 2.5 $ lattice cell boundary
4 py -2.5 $ lattice cell boundary
21 px 7.5 $ lattice boundary
22 px -7.5 $ lattice boundary
23 py 7.5 $ lattice boundary
24 py -7.5 $ lattice boundary
30 pz 10
40 pz -10

m1 1001 0.6 8016 0.3 92235 0.1
m2 5010 0.1 5011 0.2