Writing Hygienic Macros in Scheme with Syntax-Case

ion in Scheme" [4], which was mostly written before Bob's death, does attempt to justify the macro system and to place it within the context of other work. The companion report also contains more detail on the algorithms used by our implementation of the macro system. A complete implementation of the macro system is available, and should run in any Scheme system with the provision of a few implementation-dependent "hooks." It can be obtained via "anonymous ftp" from iuvax.cs.indiana.edu in the directory pub/scheme/syntax-case. If you do not have ftp access, contact me and I will get the implementation to you somehow. The implementation is based on an earlier implementation by Bob and myself of the system described in an appendix to the "Revised 4 Report on the Algorithmic Language Scheme" [2]. The present implementation, however, is more robust and significantly more efficient. I would like to thank Carl Bruggeman for his detailed and thoughtful comments on drafts of this report, and...