Commit Graph

8 Commits

Author SHA1 Message Date
Brian Picciano
2be865181d Complete refactor vm to not be as stupid
This commit is the result of many days of picking vm apart and putting
it back together again. The result is an implementation which separates
compile and runtime into separate steps, and which functions (more)
correctly in the face of recursion.

Pretty much all aspects of vm have been modified or deleted, so it's not
even really worth it to describe specific changes. Just pretend this is
the original implementaiton and the old one was never done.
2022-03-31 09:27:52 -06:00
Brian Picciano
ebf57591a8 Got basic demo working, ran go fmt 2021-12-30 15:29:38 -07:00
Brian Picciano
6257495fe4 Implement all builtins required to get fib working
Getting `recur` to work required adding an Operation argument to a bunch
of places in a really hacky way. I don't like it at all, but I'm also
kind of out of mental energy to figure it out properly. The fibonacci
demo in the README _works_, at least, though I don't think it's actually
tail recursive.
2021-12-30 15:10:25 -07:00
Brian Picciano
3a2423a937 Refactor vm to use MapReduce and Thunks
The new code is much simpler, and is able to handle more cases than
before, such as the `if` operation.
2021-12-30 14:21:58 -07:00
Brian Picciano
9c48232ac1 Allow Graph edge and vertex values to be different types
Lots of type aliases in use with `gg` to make this not be a verbose
clusterfuck.
2021-12-30 09:56:20 -07:00
Brian Picciano
c4dd673bf4 Refactor Graph internals to deduplicate OpenEdges
This change required OpenEdges to be passed around as pointers, which in
turn required me to audit how value copying is being done everywhere and
simplify it in a few places. I think I covered all the bases.

The new internals of Graph allow the graph's actual structure to be
reflected within the graph itself. For example, if the OpenEdges of two
ValueIns are equivalent then the same OpenEdge pointer is shared for the
two internally. This applies recursively, so if two OpenEdge tuples
share an inner OpenEdge, they will share the same pointer.

This change is a preliminary requirement for creating a graph mapping
operation. Without OpenEdge deduplication the map operation would end up
operating on the same OpenEdge multiple times, which would be incorrect.
2021-12-29 13:57:14 -07:00
Brian Picciano
e7991adfaa Make graph generic
The base graph implementation has been moved into its own package,
`graph`, and been made fully generic, ie the value on each vertex/edge
is a parameterized type. This will allow us to use the graph for both
syntax parsing (gg) and runtime evaluation (vm), with each use-case
being able to use slightly different Value types.
2021-12-29 12:32:53 -07:00
Brian Picciano
6040abc836 Implementation of a super basic vm
The vm does what it needs to do (evaluate the result of passing an input
to an operatio, where the input and the operation themselves may have
sub-inputs/operations to evaluate), with many caveats/misgivings.
2021-12-29 10:43:08 -07:00