GraphTypeOptions override each other

[kiambogo]

Expectation:

d := dot.NewGraph(dot.Directed, dot.Strict)

should return the following DOT:

strict digraph  {
    ...
}

Reality:

d := dot.NewGraph(dot.Directed, dot.Strict)

returns the following DOT:

strict  {
    ...
}

This appears to be because the GraphTypeOption  only works with a single option, and will overwrite itself if multiple are passed in (in the above example, strict is the last argument so is the resulting graph option used).

func (o GraphTypeOption) Apply(g *Graph) {
    g.graphType = o.Name
}

[emicklei]

thank you for reporting this issue. I will check the DOT rules about this and fix it accordingly.

[emicklei]

indeed, the strict is optional:

[ strict ] (graph | digraph)