DEC 26 2024: 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 2024: 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 2024: 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 2024: 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)