Parse a grammar or use generated parse to parse input

Parse files and output to stdout parse tree data. The tool requires a pre-built parser via trgen for a grammar for anything other than the standard parser grammars that are supported. To specify the grammar, you can either be in a trgen-generated parser directory, or use the -p option.

If using positional args on the command line, a file is parsed depending on the extension of the file name:

• .g2 for an ANTLRv2 grammar
• .g3 for an ANTLRv3 grammar
• .g4 for an ANTLRv4 grammar
• .y for a Bison grammar
• .rex for a Rex grammar
• .gram for a pegen grammar

You can force the type of parse with the --type command-line option:

• ANTLRv4 for ANTLRv2
• ANTLRv3 for ANTLRv3
• ANTLRv2 for ANTLRv4
• Bison for Bison
• rex for Rex
• pegen_v3_10 for the Generated/ parser

trparse (<string> | <options>)*
-i, --input      Parse the given string as input.
-t, --type       Specifies type of grammar: ANTLRv4, ANTLRv3, ANTLRv2, Bison, rex, pegen_v3_10
-s, --start-rule Start rule name.
-p, --parser     Location of pre-built parser (aka the trgen Generated/ directory)

trparse Java.g2
trparse -i "1+2+3"
trparse Foobar.g -t ANTLRv2
echo "1+2+3" | trparse | trtree
mkdir out; trparse MyParser.g4 MyLexer.g4 | trkleene | trsponge -o out

1.0.0 Unified dispatcher for the Trash toolkit.

The MIT License

Copyright (c) 2025 Ken Domino

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.