packages | ||
.gitignore | ||
.npmignore | ||
all.do | ||
bootstrap | ||
clean.do | ||
do | ||
gpl-3.0.txt | ||
lerna.json | ||
LICENCE | ||
Makefile | ||
package.json | ||
README.md | ||
TODO.md |
Syndicate/js
A new, efficient implementation of Syndicate for JavaScript in both node.js and the browser. The implementation techniques herein are the subject of a forthcoming paper.
Quickstart
Install a few packages from the @syndicate-lang scope on npmjs.com:
npm i --save-dev @syndicate-lang/syntax @babel/preset-env
npm i --save @syndicate-lang/core
Then, add the @syndicate-lang/syntax/plugin
to your .babelrc
. Use
npx syndicate-babel
in place of npx babel
to compile your code.
Creating a new Syndicate/js project
Create a skeletal package.json
:
{
"main": "lib/index.js",
"scripts": {
"build": "npx syndicate-babel src --out-dir lib",
"clean": "rm -rf lib"
}
}
The entry point will be lib/index.js
; the corresponding source
file will be src/index.js
.
Two npm run
scripts are defined: one which compiles Syndicate/js
source files in src
to plain JavaScript in lib
. The compiler uses
Babel; we will configure Babel next.
Create a .babelrc
file:
{
"presets": [ "@babel/preset-env" ],
"plugins": [ "@syndicate-lang/syntax/plugin" ]
}
Now, install the necessary dependencies. Babel and the Syndicate/js extensions are needed at build-time:
npm i --save-dev @syndicate-lang/syntax @babel/preset-env
The Syndicate/js runtime and as many drivers as you would like to use are needed at run-time:
npm i --save @syndicate-lang/core
npm i --save @syndicate-lang/driver-timer
Finally, create the main program file. Create a directory src
, and
then a file src/index.js
:
const { TimeLaterThan } = activate require("@syndicate-lang/driver-timer");
spawn named 'ticker' {
field this.counter = 0;
field this.deadline = +(new Date());
on start { console.log('ticker starting'); }
on stop { console.log('ticker stopping'); }
on asserted TimeLaterThan(this.deadline) {
this.counter++;
console.log('tick', new Date(), this.counter);
this.deadline += 1000;
}
stop on (this.counter == 5);
}
Now, compile the project:
npm run build
Finally, run the program:
node lib/index.js
The output should be something like:
ticker starting
tick 2018-11-05T14:23:27.713Z 1
tick 2018-11-05T14:23:28.705Z 2
tick 2018-11-05T14:23:29.706Z 3
tick 2018-11-05T14:23:30.706Z 4
tick 2018-11-05T14:23:31.707Z 5
ticker stopping
Licence
@syndicate-lang, an implementation of Syndicate for JS.
Copyright (C) 2016-2018 Tony Garnock-Jones tonyg@leastfixedpoint.com
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.