Occam-grammars NPM

Occam Grammars

Occam's grammars.

Introduction

In Occam parlance, a grammar is a combination of lexical entries for a lexer and BNF for a parser. This package contains all the grammars for Occam, specifically:

Florence
Plain
Meta JSON
Custom grammar BNF
Custom grammar pattern

This package exports the lexers and parsers to support these grammars.

Installation

With npm:

npm install occam-grammars

You can also clone the repository with Git...

git clone https://github.com/djalbat/occam-grammars.git

...and then install the dependencies with npm from within the project's root directory:

npm install

You can also run a development server, see the section on building later on.

Examples

There is a small development server that can be run from within the project's directory with the following command:

npm start

The examples will then be available at the following URL:

http://localhost:8888

The source for the examples can be found in the src/example.js file and corresponding src/example folder. You are encouraged to try the examples whilst reading what follows. You can rebuild them on the fly with the following command:

npm run watch-debug

The development server will reload the page whenever you make changes.

One last thing to bear in mind is that this package is included by way of a relative rather than a package import. If you are importing it into your own application, however, you should use the standard package import.

Usage

Import the requisite lexer and parser from this package. Then call their fromNothing(...) factory methods.

import { FlorenceLexer } from "occam-grammars";
import { FlorenceParser } from "occam-grammars"

const florenceLexer = FlorenceLexer.fromNothing(),
      florenceParser = FlorenceParser.fromNothing();

const content = `

        ...

      `,
      tokens = florenceLexer.tokenise(content),
      node = florenceParser.parse(tokens);

...

The tokens returned from the lexers's tokenise(...)`` method can be passed directly to the parser'sparse(...) method, which itself returns a node ornull`.

Building

Automation is done with npm scripts, have a look at the package.json file. The pertinent commands are:

npm run build-debug
npm run watch-debug

Contact

james.smith@djalbat.com

necessary occam-lexers occam-parsers

@infinitebrahmanuniverse/nolb-occ @everything-registry/sub-chunk-2367 @zalastax/nolb-occ occam-verifier occam-custom-grammars occam-entities

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occam-grammars v1.0.614

Occam Grammars

Contents

Introduction

Installation

Examples

Usage

Building

Contact