Labelled graphs in fgl

Henning Thielemann lemming at
Wed Feb 13 07:27:32 EST 2008

Is there a reason why graphs in fgl are labeled by default, and unlabelled
graphs must be constructed by labeling with () ? In my opinion the more
natural design would be to number the nodes and edges with an Enum type
instead of Int and to retrieve the labels from an array. This would
support the "from simple to complex" design.

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