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# Tools used to implement libsyntax
libsyntax uses several tools to help with development.
Each tool is a binary in the [tools/](../tools) package.
You can run them via `cargo run` command.
```
cargo run --package tools --bin tool
```
There are also aliases in [./cargo/config](../.cargo/config),
so the following also works:
```
cargo tool
```
## Tool: `gen`
This tool reads a "grammar" from [grammar.ron](../grammar.ron) and
generates the `syntax_kinds.rs` file. You should run this tool if you
add new keywords or syntax elements.
## Tool: `parse`
This tool reads rust source code from the standard input, parses it,
and prints the result to stdout.
## Tool: `collect-tests`
This tools collect inline tests from comments in libsyntax2 source code
and places them into `tests/data/inline` directory.
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