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Crate graphviz should Read as well as Write #21868
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Considering this crate is private to
rustc, I'm not sure that we need to add this.Yes. A full-featured graph library should live on crates.io, not in the compiler.
Yes, a full-featured graphviz library should live in crates.io, not here. But the fact is,
crate graphvizdoes live here.
Presently the graphviz crate can only write out dot files, and only through the blanket
GraphWalktrait, which describes a generic directed graph. Graphviz should also have the ability to read a dot file into memory, preserving the attributes of nodes and edges. This is probably one among many features that could be added to GraphWalk, but it would be immediately useful for parsing and manipulating dot files (a task I'm attempting right now).