Signed Files

Generated files are signed to prevent or detect manual modifications of generated code; these files can then be regenerated with new content in the future, or signatures can be disabled to generate ‘skeleton’ code, if any future changes will be manual.

Partially Generated Files

Generated code can be marked as containing manually-modifiable sections; you can use hack-codegen to rewrite the rest of the file in the future, and all manual sections will be left unmodified.

Readable Output

All built-in features handle whitespace correctly, and it’s easy to integrate this into custom code.

Extensible and Type-Safe Value Rendering

Hack Codegen can render any value as raw literal code or using var_export(); additionally, there’s built-in support for pretty-printed collections, shapes, and classname<T>.

These can be nested arbitrarily for shapes and collections, and can be extended by providing a lambda, or creating a class implementing the key or value renderer interfaces.