JavaScript Engine for Interaction Nets
npm install inet-libThis package provides an engine for evaluation of
interaction nets encoded in a language that is similar to
the refined interaction calculus as described in
[arXiv:1702.06092][1].
Implementation implicitly extends interaction systems with
McCarthy's _amb_ as a nondeterministic agent and also allows
side effects written in JavaScript.
This engine is used by [Macro Lambda Calculus][2].
[1]: https://arxiv.org/abs/1702.06092
[2]: https://www.npmjs.com/package/@alexo/lambda
require("inet-lib") returns a function of one string argument
that defines an interaction net to be evaluated.
When called, the function keeps applying interaction rules until
its normal form has been reached with no more active pairs left,
then returns this object which all side effects are executed
with (initialized to {} before reduction starts).
For developing and testing purposes, the package also exports
two additional functions .prepare(src, fmt) and .debug(),
where src is a string that defines an interaction net, and
optional fmt argument is a user-defined function used to
format arbitrary data attached to agents in debug output.
The .debug() function applies a single reduction step to
the interaction net defined by the previous .prepare(src, fmt)
call and returns a human-readable string representation of
the current interaction net state.
Input consists of three parts: interaction rules,
initial configuration, and optional initial side effect.
``
%token MARK / "$$" /
%token NAME / [A-Za-z][A-Za-z0-9] */
%token CODE / \{[^}]+\} /
%%
prog : rset MARK init tail
;
rset : / empty /
| rset side CODE side ';'
;
side : cell
| cell '[' list ']'
;
tree : leaf
| cell '(' list ')'
;
list : tree
| list ',' tree
;
leaf : cell
| NAME
;
cell : need NAME
| need NAME '_' CODE
;
need : '!'
| '\'
;
init : / empty /
| init tree '=' tree ';'
;
tail : / empty /
| MARK CODE
;
``
Copyright (c) 2015 Anton Salikhmetov
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