HSX

HSX is a preprocessor that allows literal XML syntax to be used in Haskell source code. By translating .hsx source files into ordinary .hs files, this tool enables developers to work with XML values of the appropriate forms, as literal syntax is transformed into a series of function calls.

One of the key advantages of HSX is that any project can make use of the syntax simply by providing definitions for those functions. The resulting XML values produced will be of the types specified by the project, making this tool highly flexible and adaptable to different contexts.

Moreover, HSX does not make any assumptions or insert any information depending on types, which ensures that it can be used with any types without issue. This feature is especially useful since it allows developers to work with more complex systems and data types.

To make things even easier, HSX comes equipped with XMLGenerator, which defines a few typeclasses that cover the functions injected by the preprocessor. Projects that use these classes to provide the semantics for the injected syntax will be able to reuse code with greater ease, as any functions written in terms of these can be used across different projects.

Last but not least, the classes provided by XMLGenerator allow you to use the literal syntax at different types within the same module. While achieving this can be challenging, HSX provides all the necessary machinery to ensure that developers can do so easily.

Overall, HSX is a powerful and versatile tool that can help developers work with XML values in Haskell. And with the added convenience of XMLGenerator and its typeclasses, it's easier than ever to use the literal XML syntax in your projects. Please note that HSX is licensed and distributed under the terms of the BSD License.