wolf-graph-dot 0.1.0

Adds support for generating Graphviz DOT files from wolf-graph graphs.
Documentation 
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pub fn encode_attribute(name: &str, value: &Option<&dyn ToString>) -> Option<String> {
    if value.is_none() {
        return None;
    }
    value.map(|v| format!("{}=\"{}\"", name, v.to_string()))
}

pub fn encode_attributes(attrs: &[(&str, Option<&dyn ToString>)], enclosed: bool) -> Option<String> {
    if attrs.is_empty() {
        None
    } else {
        let encoded_attrs: Vec<String> = attrs
            .iter()
            .filter_map(|(name, value)| encode_attribute(name, value))
            .collect();
        if enclosed {
            Some(format!("[{}]", encoded_attrs.join(" ")))
        } else {
            Some(encoded_attrs.join(" "))
        }
    }
}