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Include bond order in TopologyGraph #461

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PR Summary:

Foyer currently does not understand bond order in its TopologyGraph
representation and in its SMARTS grammar aside from number of connected
neighbors [C;X4], for example.

This PR adds bond order as an attribute when adding bonds in the
TopologyGraph, accepted options currently are:

"1" : single bonds
"2" : double bonds
"3" : triple bonds
"ar" : aromatic bonds
"am" : amide bonds
"un": unknown,
"du": dummy
"nc": not connected

The last 3 bond types ("un", "du", and "nc") are subject to change and
may not be here in the final iteration of this PR.

Support has been added when converting parmed structures, openff
topologies, as well as GMSO topologies.

PR Checklist


  • Includes appropriate unit test(s)
  • Appropriate docstring(s) are added/updated
  • Code is (approximately) PEP8 compliant
  • Issue(s) raised/addressed?

`Foyer` currently does not understand bond order in its `TopologyGraph`
representation and in its SMARTS grammar aside from number of connected
neighbors [C;X4], for example.

This PR adds bond order as an attribute when adding bonds in the
`TopologyGraph`, accepted options currently are:

"1"  : single bonds
"2"  : double bonds
"3"  : triple bonds
"ar" : aromatic bonds
"am" : amide bonds
"un": unknown,
"du": dummy
"nc": not connected

The last 3 bond types ("un", "du", and "nc") are subject to change and
may not be here in the final iteration of this PR.

Support has been added when converting parmed structures, openff
topologies, as well as GMSO topologies.
@@ -183,11 +203,22 @@ def from_openff_topology(cls, openff_topology):
element=element,
)

bond_type_dict = {
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This might be better implemented as an Enum.

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codecov bot commented Oct 27, 2021

Codecov Report

Merging #461 (e031e05) into main (882fd32) will decrease coverage by 21.09%.
The diff coverage is 31.57%.

❗ Current head e031e05 differs from pull request most recent head dfb9825. Consider uploading reports for the commit dfb9825 to get more accurate results

Additional details and impacted files
@@             Coverage Diff             @@
##             main     #461       +/-   ##
===========================================
- Coverage   69.55%   48.47%   -21.09%     
===========================================
  Files          16       17        +1     
  Lines        1662     1863      +201     
===========================================
- Hits         1156      903      -253     
- Misses        506      960      +454     

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3 participants