Use PrimMonad to make life easier

haskell / fgl

A Functional Graph Library for Haskell

http://hackage.haskell.org/package/fgl

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Open treeowl opened 8 years ago

treeowl commented 8 years ago

As usual, the IO and ST code were actually the same. PrimMonad abstracts from that, and also adds support for monad transformers.
Removed utterly bogus Show instances for monadic graphs. The right thing to do is probably to offer a graph freezing primitive; then the frozen graph can be shown as usual. For large graphs, streaming conversion would be useful.

treeowl commented 8 years ago

This is a bit of a work in progress, and definitely not something to merge in a minor version. But I think the general idea is right.