Print a parse tree in Graphvis Dot format
Reads a tree from stdin and prints the tree as a Dot graph.
trdot
trdot reads parse tree data via stdin and outputs
a Dot graph specification. The stdout can be redirected to
save the output to a file. Or, you can copy the output and
use an online Dot graph visualizer to make a plot.
Any parse tree data can be converted to Dot, include a
parse of a grammar, the parse tree of a simple expression grammar,
or a list of parse tree nodes obtained via
trquery.
Consider the Expression grammar, obtained via
mkdir foo; cd foo; trgen; cd Generated; dotnet build
Let's parse the expression "1+2" and print the parse tree as a Dot graph:
trparse -i "1+2" | trdot
The output will be:
digraph G {
Node18643596 [label="file_"];
Node33574638 [label="expression"];
Node33736294 [label="expression"];
Node35191196 [label="atom"];
Node48285313 [label="scientific"];
Node31914638 [label="1"];
Node18796293 [label="+"];
Node34948909 [label="expression"];
Node46104728 [label="atom"];
Node12289376 [label="scientific"];
Node43495525 [label="2"];
Node55915408 [label="EOF"];
Node18643596 -> Node33574638;
Node18643596 -> Node55915408;
Node33574638 -> Node33736294;
Node33574638 -> Node18796293;
Node33574638 -> Node34948909;
Node34948909 -> Node46104728;
Node46104728 -> Node12289376;
Node12289376 -> Node43495525;
Node33736294 -> Node35191196;
Node35191196 -> Node48285313;
Node48285313 -> Node31914638;
}
0.23.9 Fix various problems with tragl, trgen, trparse, trperf, trextract, trtree.
The MIT License
Copyright (c) 2024 Ken Domino
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