JAN 19 2025: Version 0.30.0

• Loop macros and defun, defunret are part of LBM now.
• Added "unsafe" variant of callcc for efficiency in cases where it can be used.
• lbm_get_global_env_size function added.
• Error printing then "trapped" can be toggled.
• Added a defstruct functionality.
• Custom types are being phased out where not absolutely needed.
• Added mutex extensions.
• Bugfixes and refactorings for making static analysis happy.

DEC 26 2024: Version 0.29.0

• Identity operation added
• Bugfix in recv-to.
• bugfix in is_printable_string.

DEC 5 2024: Version 0.28.0

• Fixes bugs in recv-to (receive with timeout).
• Fixes crash when trying to read an empty buffer.
• Error message improvements.
• Display library character spacing when rendering upwards or downwards text (thanks r3n33).
• Changes to how memory usage statistics is collected.
• Pointer reversal GC now compatible with recent language additions.

NOV 5 2024: Version 0.27.0

• A number of important bugfixes. A write out of bounds among the most important.
• Addition of integer division operation (By Rasmus S)
• A lot of refactoring for readability of code and reduce code complexity.
• A defragmentable memory (compactible memory area).
• Vesc interfacing in the LBM REPL. AUG 6 2024: Version 0.26.0
• Bugfix related to restargs.
• coverage report in relation to the unit tests. JUL 23 2024: Version 0.25.0
• Multiple bugfixes.
• Trap function on expressions.
• Reference manual updates.
• New String operations (Thanks Rasmus S)
• Order of writes changed when writing to flash.

APR 28 2024: Version 0.24.0

• Cleaning of lispbm repository. less to maintain.
• Lots of improvements to documentation.
• lbm_memory optimization.

MAR 9 2024: Version 0.23.0

• rest-args functionality added to function application of lambda defined function.
• Improved x86 REPL.
• Refernce manual is generated from LispBM script.
• Optional env arguments for eval and eval-program.
• Backwards indexing in setix using negative numbers.
• Bug fix: type promotion
• Bug fix: addition and subtraction of byte values

DEC 26 2023: Version 0.22.0

• Built-in sort operation on lists.
• Built-in list-merge operation.
• Bugfix in map.
• Literal forms for special characters.

NOV 28 2023: Version 0.21.0

• Removed partial evaluation.
• Added a built-in loop.
• Modification to built-in implementation of map.
• Addition of pointer-reversal garbage collector. Not on by default.
• Improved error messages.

NOV 1 2023: Version 0.20.0

• Added lbm_set_error_suspect function to enable extension authors to point out in more detail what is wrong.
• Improvement to error messages in some cases.
• Changed behavior of set family on functions when variable is not already bound (now an error).
• Fix of bug in flat_value handling.

OCT 8 2023: Version 0.19.0

• Error message and callback on GC stack overflow.
• Functions for gc stack size statistics added.
• GC does not look at constant values.
• Changes to environment handling during pattern matches.

AUG 26 2023: Version 0.18.0

• Removed wait-for flags
• Fix bug in unblock_unboxed when unblocking with error value.

JUL 29 2023: Version 0.17.0

• Addition of a timeout functionality to blocked contexts.
• recv-to special form added for receives with a timeout.
• block_context_from_extension_timeout function added.
• Unified sleeping and blocked queues.
• Added a new optional argument to spawn and spawn-trap that can be used to provide a name for the thread.
• Added profiler functionality.

JUL 16 2023: Version 0.16.0

• Addition of flat values as a type in the language.
• Addition of kill function for termination of threads.

JUN 29 2023: version 0.15.0

• Bug fix in lift_array_flash.
• Bug fix in map.
• Bug fix in reader.
• Bug fix in dynamic load.
• Bug fix in quasiquotation expansion.
• JUN 8 2023: Version 0.14.0
• wait-for that blocks code unless a flag is set.
• Bug fix in undefine.
• Lots of cleaning and refactoring.

MAJ 5 2023: Version 0.13.0

• Changed behavior of closure application to zero args. Used to be equivalent to application to nil.
• Removed make-env and in-env.
• Refactoring for readability. allocate_closure in eval_cps.

APR 30 2023: Version 0.12.0

• added make-env and in-env for a kind of namespace management.
• Deeply nested errors are resolved using longjmp.

Apr 4 2023: Version 0.11.0

• Incremental read evaluates expressions as soon as possible while reading.
• move-to-flash for storing constant parts of program in flash.
• All arrays are now byte-arrays. [type-X 1 2 3]-syntax removed.

Mar 19 2023: Version 0.10.0

• Added deconstructive let bindings with optional dont-care fields.
• Added (var x (....)) for local bindings in progn.
• Added setq
• Curly brackets { .... } syntax as sugar over progn.

Feb 18 2023: Version 0.9.0

• Arrays in flat_value are stored verbatim, not as ptr.
• Mutex locking granularity changed in multiple places.

Feb 10 2023: Version 0.8.1

• Flat representation of heap values added.
• Added queue locking to GC
• As an experiment blocked contexts are unblocked by the evaluator in a safe state.

Jan 28 2023: Version 0.8.0

• Changed return value of define from being the bound symbol to being the value.
• Many of the more general extensions from Benjamin's BLDC repository has moved into the LispBM source code.

Dec 11: Version 0.7.1

• Changes to heap_allocate_cell for readability and perhaps performance.
• Added heap_allocate_list for allocation of multiple cells at once.

Nov 9: Version 0.7.1

• Bugfix: string literal lengths.
• not-eq and != added.
• Corrected behaviour for eval when applied to no argument.
• lbm_memory operations are protected by mutex.
• Fixes to eval-program.
• Added multiple condition conditional function called cond.

Oct 31: Version 0.7.1

• Added optional boolean guards to pattern matches.
• Built in map and reverse.

Oct 16: Version 0.7.0

• Refactoring for evaluation speed.
• Removed possibility to step through code.
• Oldest message is removed on mailbox full.
• Added spawn-trap inspired by Erlang (but simplified).

Sep 25: Version 0.7.0

• Removed namespaces (they were too restricted).
• Mailboxes are now stored in arrays of default size 10 mails. Mailbox size can be changed using set-mailbox-size.

Sep 16 2022: Version 0.6.0

• Source code can be streamed onto the heap. This means there is no need for a large buffer on the MCU (or area of flash) to parse source code from

Sep 5 2022: Version 0.6.0

• Refactoring of array-reader. Array reading is nolonger done monolithically inside of the tokpar framework, but rather as a cooperation between the evaluator and the tokenizer.

Sep 3 2022: Version 0.6.0

• Round-robin scheduling + Addition of an Atomic construct to use with care.

Aug 1 2022: Version 0.5.4

• Easing use of the LBM library from C++ code.

Jul 25 2022: Version 0.5.4

• lbm_define can now create variables (#var) in variable memory from the C side of things.
• Simple namespaces.

Jul 18 2022: Version 0.5.4

• Added pattern matching support for i64, u64 and double.
• Fixed issue with pattern matching on i32, u32.

Jul 17 2022: Version 0.5.4

• Refactoring with readability in focus.
• Computing encodings of commonly used symbol constants (for eval_cps) at compile time rather then repeatedly at runtime.

Jul 13 2022: Version 0.5.4

• Added function that lookups based on the second field in assoc structures. Called it "cossa" as it is like assoc but backwards.

Jul 4 2022: Version 0.5.4

• Added possibility to partially apply closures. A partially applied closure is again a closure.

May 24 2022: Version 0.5.3

• Fixed bug related to float-array literals not accepting whole numbers unless containing a decimal (0).

May 22 2022: Version 0.5.3

• Fixed bug that could cause problems with call-cc on 64bit platforms.
• bind_to_key_rest continuation refactoring to use indexing into stack.
• Fix evaluator bug in progn that made tail-call not fire properly when there is only one expr in the progn sequence.

May 10 2022: Version 0.5.3

• symbols starting with "ext-" will be allocated into the extensions-list and can on the VESC version of lispbm be dynamically bound to newly loaded extensions at runtime.

May 8 2022: Version 0.5.2

• Added new macros for 10, 12 and 14K lbm_memory sizes.

May 5 2022: Version 0.5.2

• Line and column numbers associated with read errors.
• More explanatory descriptions in error messages related to read errors.

May 2 2022: Version 0.5.2

• Performance tweaks to the evaluator. Small but positive effect.

May 1 2022: Version 0.5.2

• Added lbm_stack_reserve for allocating multiple words on stack in one function call (and one check on stack limits).

Apr 19 2022: Version 0.5.2

• Added a reader_done_callback that is run when a context is done with a reading task.
• Array-literal syntax.
• Restructure symbol evaluation for efficiency and readability.
• Rewrite progn to update stack in place when possible.
• Removed a bunch of convertion back and forth from C and LBM representation of continuation identifiers in eval_cps. They are now compared in encoded form in the evaluator.
• Added lbm_cadr and replaced lbm_car(lbm_cdr(x)) with lbm_cadr(x) in the evaluator.

Apr 10 2022: Version 0.5.1

• Removed the prelude.lisp, prelude.xxd step of building LBM.
• A continuation created by call-cc can be applied to 0 or 1 argument. If there are 0 arguments an implicit application to nil takes place.

Mar 26 2022: Version (0.5.0)

• Optimized code-path for closure applications.
• 64 and 32 bit support from a single source code
• Added math extensions library from Benjamin Vedder
• Added String manipulation extensions library from Benjamin Vedder

Mar 10 2022: Version (0.4.2)

• Added the lbm_set_error_reason function.

Mar 02 2022: Version (0.4.2)

• Bug fix in initialization of contexts.

Feb 28 2022: Version (0.4.2)

• First go at human-readable error messages.
• Finished contexts are immediately and completely removed.
• Context ids are now set to the index into the lbm_memory where the context structure is stored.

Feb 21 2022: Version (0.4.1)

• Bug fixes in gc related to arrays

Feb 20 2022: Version (0.4.0)

• Adds support for macros.
• Adds call-cc for escaping and abortive continuations.

Feb 17 2022: version 0.3.0

• Added lbm_undefine to c_interop.
• Added lbm_share_array to c_interop.
• Added lbm_create_array to c_interop.
• #var variables with more efficient storage and lookup. variables are set using setvar.
• Spawn optionally takes a number argument before the closure argument to specify stack size.
• Extensions are stored in an array and occupy a range of dedicated symbol values.

Feb 14 2022: version 0.2.0

• Added GEQ >= and LEQ <= comparisons.

Feb 13 2022: version 0.1.1

• Bug fix in handling of environments in progn.

Feb 11 2022: version 0.1.0

• First state to be given a numbered version (0.1.0)