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# Reference grammar.
Uses [antlr4](http://www.antlr.org/) and a custom Rust tool to compare
ASTs/token streams generated. You can use the `make check-lexer` target to
run all of the available tests.
The build of the rust part is included with `make tidy` and can be run with `make check-build-lexer-verifier`.
# Manual build
To use manually, assuming antlr4 is installed at `/usr/share/java/antlr-complete.jar`:
```
antlr4 RustLexer.g4
javac -classpath /usr/share/java/antlr-complete.jar *.java
rustc -O verify.rs
for file in ../*/**.rs; do
echo $file;
grun RustLexer tokens -tokens < "$file" | ./verify "$file" RustLexer.tokens || break
done
```
Note that the `../*/**.rs` glob will match every `*.rs` file in the above
directory and all of its recursive children. This is a Zsh extension.
## Cleanup
To cleanup you can use a command like this:
```bash
rm -f verify *.class *.java *.tokens
```
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