Group functions filter out tail match results

[dmulyalin]

When having this template and data:

data = """
interface Gig123
 description foo
 mtu 1234
 ipv4 address 1.2.3.4 255.255.255.0
 arp timeout 123
 mac-address 123.123.1
!
interface Gig321
 description foo
 mtu 4321
 ipv4 address 1.2.3.5 255.255.255.0
 arp-timeout 4321
 mac-address 123.123.2
!
"""
template = """
<group name="interfaces*" contains="name">
interface {{ name }}
 description {{ description | re(".*") }}
 mtu {{ mtu | to_int }}
 mac-address {{ mac_address }}
 arp timeout {{ arp_timeout }}

 <group name="ipv4*" method="table">
 ipv4 address {{ ip | _exact_ }} {{ mask }}
 </group>

!{{ _end_ }}
</group>
"""

Parsing gives these results:

[[{'interfaces': [{'description': 'foo',
                   'ipv4': [{'ip': '1.2.3.4', 'mask': '255.255.255.0'}],
                   'mtu': 1234,
                   'name': 'Gig123'},
                  {'description': 'foo',
                   'ipv4': [{'ip': '1.2.3.5', 'mask': '255.255.255.0'}],
                   'mtu': 4321,
                   'name': 'Gig321'}]}]]

this is due to the fact that mac_address matched after ipv4 group matched, and by the time we process mac_address match group functions results does not have name attribute in them. Removing contains="name" produces expected result:

[[{'interfaces': [{'arp_timeout': '123',
                   'description': 'foo',
                   'ipv4': [{'ip': '1.2.3.4', 'mask': '255.255.255.0'}],
                   'mac_address': '123.123.1',
                   'mtu': 1234,
                   'name': 'Gig123'},
                  {'description': 'foo',
                   'ipv4': [{'ip': '1.2.3.5', 'mask': '255.255.255.0'}],
                   'mac_address': '123.123.2',
                   'mtu': 4321,
                   'name': 'Gig321'}]}]]

[dmulyalin]

Introduced fix in latest commit, fix logic is weak but simplest to fix this issue, better approach required to collect parsing results in general but will require significant code refactoring.

[ffhan]

@dmulyalin first of all thank you so much for this project, it is amazing.

Unfortunately, this bug is still not fixed even in version 0.9.5. I can provide the minimal example to reproduce if needed.