* [ANN] Guile-SMC 0.6.1 released
@ 2023-07-31 4:31 Artyom V. Poptsov
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From: Artyom V. Poptsov @ 2023-07-31 4:31 UTC (permalink / raw)
To: Guile Users' Mailing List
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I'm pleased to announce Guile State Machine Compiler (Guile-SMC), version
This release adds support for setting a global event source for a
finite-state machine in PlantUML using "legend" section and context
sub-types for "smc context" command. Some bugs fixed as well, please
see the list of notable changes below.
* What is Guile-SMC?
Guile-SMC is a state machine compiler that allows to describe finite
state machines (FSMs) in Scheme in terms of transition tables. It is
capable to generate such transition tables from a PlantUML state
Some of the key features:
- A transition table can be verified and checked for dead-ends and
- Guile-SMC FSMs gather statistics when they run (steps/transitions);
the statistics can be used can be used to compare/analyze FSMs..
- There's an FSM profiler that runs on FSMs trace logs. The profiler
output shows how much time the FSM spends in each state. This can be
useful for optimization.
- The state machine compiler supports three "targets" for compilation: a
regular "guile" target where the output FSM depends on Guile-SMC;
"guile-standalone" target that produce an FSM that does not depend on
- Guile-SMC allows to run a FSM on-the-fly with a single "smc run"
command -- see the docs and the examples for more information.
- Common context code for parsers that work with characters or bytes.
This includes special data structures to provide memory for FSMs
(although it is not required to use them; FSMs can use custom
procedures and data structures.)
Guile-SMC comes with a Scheme program called 'smc' -- a state machine
compiler itself. It produces a Scheme code for an FSM from the PlantUML
format. This tool is meant to be called on a PlantUML file when a
program with a FSM is being built (for example, from a Makefile.)
I'm hoping that it will ease the burden of writing format parsers and
other useful GNU Guile libraries for the community.
* User-visible changes
* Version 0.6.1 (2023-07-30)
** Allow to set a global event source in a PlantUML "legend" block
Now PlantUML parser allows to set a global event source for an FSM in a
"legend" block, like follows:
some_state: event-source: some-event-source
** =smc context=: Allow to set context sub-type
=smc context= now allows to set a context sub-type to minimise the amount of
imported code. This change is backward-compatible with the old CLI as "oop"
and "functional" types still supported. Please see =smc context --help= for
the full list of supported types and subtypes.
** =fsm-run!= bugfix: Return the updated context at the end
Return the updated context at the end of FSM run.
** =(smc core state)=: Bugfix
Add missing serialization of the state "exit-action". Also set the state exit
action when the state is de-serialized.
* Usage examples
- Guile-INI -- INI format parser:
- Guile-ICS -- iCalendar (RFC 5545) and vCard (RFC 6350) parser:
- Guile-PNG -- Pure Scheme Portable Network Graphics (PNG, RFC 2083)
Artyom "avp" Poptsov <firstname.lastname@example.org>
Home page: https://memory-heap.org/~avp/
CADR Hackerspace co-founder: https://cadrspace.ru/
GPG: D0C2 EAC1 3310 822D 98DE B57C E9C5 A2D9 0898 A02F
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