nearley-auto-unwrap
v0.1.0
Published
Makes rules with one symbol return that symbol's value, instead of an array containing it.
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nearley-auto-unwrap
Makes rules with one symbol return that symbol's value, instead of an array containing it.
Implementation of kach/nearley#505 as a package.
Install
$ npm install nearley-auto-unwrap
Usage
const {Parser, Grammar} = require('nearley');
const addAutoUnwrap = require('nearley-auto-unwrap');
const grammar = require('./grammar.js');
const autoUnwrapGrammar = addAutoUnwrap(grammar);
const parser = new Parser(Grammar.fromCompiled(autoUnwrapGrammar));
In contrast to the proposed feature at kach/nearley#505, addAutoUnwrap
transforms a compiled grammar and thyu does not support the @autoUnwrap
option. Instead, you can exclude rules from processing by providing an exclude function as an additional option:
const autoUnwrapGrammar = addAutoUnwrap(grammar, {
exclude: rule => rule.name.startsWith('foo_')
});