ASD Serializer

[Zulu-Inuoe]

I want a 'good' serializer library for ASDF system files (asd files).

Such a library should at the minimum have the following:

1. Support for feature tests via #+ and #-
2. When reading and writing a file, unmodified, bit-by-bit, the output should match the input (no losing whitespace, comments, or anything else)
3. Ability to add/remove logical components while still preserving structure.

• eg: I want to add the string "hello" as the fifth item in a list.

This library need not be smart about inserting/deleting, beyond adding the minimum amount of formatting required for output to parse, such as a space to separate forms, a newline to insert forms after line comments, and so on.

The need for such a library is for clution to have a programmatic way of reading/writing ASDF files for automatically adding/removing files. components, and managing dependencies (:depends-on at a system level, at least).