Version “2.10” released 2024-10-10

This version of STklos mostly enhances the 2.00 version released a year ago. As usual, this version could not have be finalized without the help of Jeronimo Pellegrini (@jpellegrini).

Contributors for this version:

• Akinori Hattori (@hattya)
• Jeronimo Pellegrini (@jpellegrini)

Enhancements:

• Corrected the result of stklos-config --compile
• Added the second (optional) parameter to R7RS load (and try-load)
• Enhanced various things about STklos compilation/installation
• Added information in the summary of configuration script
• Builds are now reproducible
• FFI support can be completely disabled, if needed.
• Updated GTklos, the GTK+ extension
• Optimize expt primitive.
• Avoid unneeded boxing of numbers in the +, -, * and / operations
• Added ! as a shell escape under the REPL
• Added statistics to the VM
• Permit to build STklos with the tcc C compiler.
• Added an simple hybrid (C and Scheme) module in the examples directory
• Correct/enhance implementation of numerical functions in some corner cases (in particular with NaNs and infinities).
• Added an API to add expressions rewriting rules before their compilation.
• Location given in error message is more precise
• Error messages don’t loop anymore when displaying circular structures
• Added list-set! as the setter function of list-ref
• Added the number of allocations and collections to the output of the time form
• Added special instructions in the VM for member, memq and memv
• Added special instructions in the VM for assoc, assq and assv
• Do constant folding before in-lining usual functions
• Better UTF-8 support and updated Unicode tables to version 16.0.0
• Enhance the apropos primitive
• New REPL variables: @*, @1, @2, @3, @4 and @5
• New REPL commands: time, describe, expand, import, require-feature, open, browse, manual, apropos
• Documentation of a function can be accessed directly into the HTML Reeference Manual
• Length of symbols is no more limited.

New primitives / parameters:

• read-ci
• eval-form-string-ci
• read-from-sring-ci
• compiler:source-rewrite
• compiler:peephole-optimizer
• 1+ and 1-
• push! and pop
• inc! and dec!
• dolist
• apropos/alist
• apropos/pp
• default-browser
• open-in-browser
• manual
• install-path
• define-parameter

Updated embedded libraries

• libgc updated to version 8.2.8
• libffi updated to version 3.4.6
• libpcre2 updated to version 10.44

New supported SRFI

• SRFI-115: Scheme Regular Expressions
• SRFI-178: Bitvector library
• SRFI-232: Flexible curried procedures

Misc:

• Updated documentation
• Added tests
• Code cleaning an optimizations
• Bug fixes

Version “2.00” released 2023-09-12

This is a major version of STklos, bringing it from R⁵RS to R⁷RS. It is the fruit of nearly two years of development with the help of the following persons (in alphabetical order):

• Amirouche Boubekki (@amirouche)
• Lassi Kortela (@lassik)
• Ivan Maidanski (@ivmai)
• Tom Niget (@zdimension)
• Jeronimo Pellegrini (@jpellegrini)
• Ryan Schmidt (@ryandesign)
• Ben Taca (@bentaca)
• Robby Zambito (@Zambito1)

The main changes in this version are:

• Support for R⁷RS libraries
• Macro system has been rewritten
• Support for ScmPkg packages has been suppressed
• New options for the commands stklos(1) and stklos-compile(1)
• Optimizations on numerical operations
• Documentation is rewritten in asciidoctor and has been greatly enhanced
• Updated the Docker build files
• New instructions in the VM
• Fixed some issues in the compilation/installation procedure
• New extension: curl to access the multiprotocol file transfer library
• Better support for macOS
• describe has been enhanced for some type of objects
• REPL has now tab completion
• Bash and zsh completions for stklos and stklos-compile commands
• Better SLIB support
• Use PCRE2 library instead of legacy PCRE
• New-command stklos-pp(1)
• Better error messages
• New SRFIS supported
  • SRFI-19: Time Data Types and Procedures
  • SRFI 43: Vector Library
  • SRFI-95: Sorting and Merging
  • SRFI 116: Immutable List Library
  • SRFI 125: Intermediate hash tables
  • SRFI-138: Compiling Scheme programs to executables
  • SRFI 152: String Library (reduced)
  • SRFI-162: Comparators sublibrary
  • SRFI 154: First-class dynamic extents
  • SRFI-215: Central Log Exchange
  • SRFI 217: Integer Sets
  • SRFI 222: Compound objects
  • SRFI 224: Integer Mappings
  • SRFI-227: Optional Arguments
  • SRFI 228: Composing Comparators
  • SRFI-229: Tagged Procedures
  • SRFI-230: Atomic Operations
  • SRFI 235: Combinators
  • SRFI 236: Evaluating expressions in an unspecified order
  • SRFI-238: Codesets
  • SRFI 244: Multiple-value Definitions
• Added support for some R7RS-large libraries
  • supported libraries of the Red edition are
    • (scheme bytevector)
    • (scheme box)
    • (scheme charset)
    • (scheme comparator)
    • (scheme generator)
    • (scheme hash-table)
    • (scheme ideque)
    • (scheme ilist)
    • (scheme list)
    • (scheme list-queue)
    • (scheme lseq)
    • (scheme set)
    • (scheme sort)
    • (scheme stream)
    • (scheme text)
    • (scheme vector)
  • supported libraries of the Tangerine edition are
    • (scheme bitwise)
    • (scheme bytevector)
    • (scheme division)
    • (scheme fixnum)
    • (scheme flonum)
    • (scheme generator)
    • (scheme vector @)
• New primitives
  • library-name
  • library-list
  • module-list
  • module-lock!
  • module-locked?
  • symbol-mutable?
  • define-constant
  • cpointer-null?
  • syntax-error
  • hash-table-clear!
  • environement
  • send-signal
  • set-signal-handler!
  • get-signal-handler
  • void?
  • procedure-source
  • procedure-formals
  • short-version
  • radians->degrees
  • degrees->radians
  • sinh, cosh, …
• New compiler options (also parameter objects):
  • compiler:gen-line-number
  • compiler:show-assembly-code
  • compiler:time-display
  • compiler:keep-formals
  • compiler-keep-source
  • compiler:inline-common-functions
  • compiler:unroll-iterations
  • repl-show-startup-message
• New predefined classes
  • <uvector>
  • <bytevector>
  • <hash-table>
  • <port>
  • <input-port>
  • <output-port>
• Code cleaning an optimizations
• Added tests
• Bug fixes

Version “1.70” released 2021-11-25

This version further improves compliance with R7RS and brings some new SRFIs

The main changes in this version are:

• Added the some comma-commands to the REPL (,pwd ,cd and ,shell)
• Use system Posix glob instead of the provided gnu-glob
• Improved reader (|.| is wow valid symbol as well as numbers with bars)
• New primitive/syntaxes
  • tagbody
  • repeat
  • keyword-colon-position is a parameter object specifying the places where the colon can be used in keyword.
• Suppressed the calls to insecure C function (such as strcpy or strcat)
• List reading is tail recursive now
• Added an extension directory, which contains for now:
  • GTKlos which gives access to the GTK+ toolkit using the OO layer available in STklos. This version uses the GTK+3 toolkit. It also defines a canvas widget. if the to have the goocanvas library is installed.
  • an extension which permits to make a file system in Scheme, using FUSE (Filesystem in Userspace).
• Use gmp-mini (which is provided) if gmp is not available, instead of our version which was based on old unmaintained version of mpi.
• Support of new SRFIs:
  • SRFI-25: Multi-dimensional Arrays
  • SRFI-27: Source of random bits
  • SRFI-29: Localization
  • SRFI-94: Type-Restricted Numerical Functions
  • SRFI-132: Sort Libraries
  • SRFI-133: Vector Library (R7RS-compatible)
  • SRFI-143: Fixnums
  • SRFI-144: Flonums
  • SRFI-170: POSIX API
  • SRFI-208: NaN procedures
  • SRFI-214: Flexvectors
  • SRFI-217: Integer Sets
  • SRFI-219: Define higher-order lambda
  • SRFI-223: Generalized binary search procedures
• SRFI can be implemented in C and Scheme
• Various optimizations
• Documentation update
• Added tests
• Bug fixes