Commit Graph

20 Commits

Author SHA1 Message Date
Brian Picciano
c5aa582226 Improve semantics of tokens and values obtained from them.
Now gg.Values can carry the token used to parse them, which will be
useful later when generating errors.
2021-12-28 09:49:02 -07:00
Brian Picciano
33e59a3836 Implement Decoder
The decoder basically works, though there's some quirks in the design
I'll need to marinate one. For example, you can't have a tuple as an
edge value. This is probably fine?

Stringification of Graphs was added to aid in debugging the decoder, the
format it outputs is not the final one. Most likely the (future) encoder
will be used for that purpose.

The decoder is not implemented in the nicest way; it fully reads in the
LexerTokens first, and then processes. This made trying to wrap my head
around the problem a lot easier because it left fewer failure cases, but
it's not the most efficient thing to do.

Now that v0 is done it's pretty plain to see that the decoder could work
by only reading in the next N tokens that it needs at a time. But that
will be left for a future version.
2021-12-27 15:45:18 -07:00
Brian Picciano
82e74cb55f Improvements to gg.Graph
An empty `Value` is now valid.

It is now possibly to change the edgeVal of an OpenEdge. It feels like
this shouldn't be necessary, but it greatly simplifies the decoding
logic to have this.

A tuple which is created with just one input edge, and with no edge
value of its own, is now automatically simplified to just that input
edge.
2021-12-27 14:22:56 -07:00
Brian Picciano
e2ffc37ddc Don't treat newlines specially
For MVP newlines aren't going to be used as a syntax terminator, they're
just going to be whitespace. Otherwise the decoding logic gets way more
complicated.
2021-12-27 14:22:56 -07:00
Brian Picciano
1e30ad6959 Strip out most of the functionality of gg.Graph
`gg.Graph` has been reworked in its internal functionality, to more
closely match the capability of a purely stack-based implementation. The
current implementation is _very_ inefficient, however. Tests have been
deliberately left pretty sparse, as I expect the internals to continue
to change significantly.
2021-12-27 10:11:07 -07:00
Brian Picciano
e4bdeb8797 Implement lexer for new syntax 2021-12-26 14:49:43 -07:00
Brian Picciano
b1831a670f End comments with periods 2021-12-26 14:49:22 -07:00
Brian Picciano
f530cb481a rename Junction to Tuple, update syntax, rename Null to ZeroGraph 2021-08-26 21:26:24 -06:00
Brian Picciano
b906697151 gg: rename Walk to Iter, and implement Disjoin 2018-06-07 02:21:44 +00:00
Brian Picciano
c16fc00bf7 notes for gim on graph drawing algo, and some TODOs 2018-06-02 08:45:03 +00:00
Brian Picciano
65933a004d gim: properly sort outgoing edges along the from box 2018-06-02 06:52:42 +00:00
Brian Picciano
905b182467 gim: make incoming edges separate along the drawn rectangle edge, instead of all overlapping onto the same point 2018-06-02 06:51:53 +00:00
Brian Picciano
bd650dfc08 implement json marshaling and unmarshaling (TODO needs tests) 2018-01-23 13:32:22 +00:00
Brian Picciano
e52befb7ed refacctor gg to use Value instead of Identifier, which will make serializing more straightforward, and reduces some complexity of the code besides 2018-01-21 15:39:25 +00:00
Brian Picciano
754b75407a integrate constraint engine into determining box positioning 2017-12-03 12:38:53 -07:00
Brian Picciano
79a171323d implement basic constraint engine in gim, which will be used to determine positioning of vertices 2017-11-25 14:33:00 -07:00
Brian Picciano
286c2fbb35 use gg.Str instead of gim.str 2017-11-24 11:05:58 -07:00
Brian Picciano
5ab1d4c7f0 implement gg.Graph.Walk 2017-11-05 09:57:57 -07:00
Brian Picciano
cae3116424 rename gg.HalfEdge to gg.OpenEdge 2017-11-05 09:11:05 -07:00
Brian Picciano
d700390b54 move gg into root, it's not really subject to the lang 2017-11-02 14:59:31 -06:00