FA-12490 / Molecular graph representation / Member archive

An unspecified query charge becomes a neutral-only constraint · case 05

An unspecified query charge becomes a neutral-only constraint.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Query has element string or * wildcard and charge integer or None wildcard. Match target element and charge conjunctively, with only None disabling charge constraint.

Why this case matters

Controlled molecular graph interchange model; tests isolate atom or bond representation errors without claiming chemical validity or production toolkit equivalence.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
wildcard charge	`false`	`true`	Failed

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