Hello, i released Scheme+ for Guile version 9.1:
https://github.com/damien-mattei/Scheme-PLUS-for-Guile It is a big refactoring of code,now completely implemented with modules and still use syntax transformers. It add very few new features but it is a complete refactoring of the code presentation using modules. (instead of mixed included/imported files of the previous releases) I use the Guile modules instead of R*RS (that have little problem in current version of Guile) Scheme+ add a lot of "syntactic sugar" to Scheme : infix with precedence operator, [ ] square bracket notation for indexed objects (vector, arrays, strings,...), and much more i can not describe in a short message. Here is a limited (not all) overview of the modules dependencies focusing on the infix and square bracket SRFI 105 interaction: [image: schema-scheme+.jpg] So now we can use all features of Scheme+ or only load what we want module by module. Examples: to use operator precedence in infix: scheme@(guile-user)> (use-modules (nfx)) scheme@(guile-user)> {3 * 5 + 2} $1 = 17 to use square bracket with vectors,strings,hash tables, arrays,etc ... : scheme@(guile-user)> (use-modules (bracket-apply)) scheme@(guile-user)> {#(1 2 3 4 5)[2]} $2 = 3 scheme@(guile-user)> (use-modules (slice)) scheme@(guile-user)> {"hello"[0 : 5 : 2]} $4 = "hlo" scheme@(guile-user)> {"hello"[: : -1]} $5 = "olleh" (this slicing syntax is same as Python syntax adapted to Scheme, with a few differences inherent to Scheme/Python objects differences) I will describe slowly and more precisely in other messages each one of the features of Scheme+ in the next weeks. Regards, Damien
