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token-stream\n\nTake an array of token and produce a more useful API to give to a parser.\n\n[![Build Status](https://img.shields.io/travis/pugjs/token-stream/master.svg)](https://travis-ci.org/pugjs/token-stream)\n[![Dependency Status](https://img.shields.io/david/pugjs/token-stream.svg)](https://david-dm.org/pugjs/token-stream)\n[![NPM version](https://img.shields.io/npm/v/token-stream.svg)](https://www.npmjs.org/package/token-stream)\n\n## Installation\n\n    npm install token-stream\n\n## Usage\n\n```js\nvar TokenStream = require('token-stream');\n\nvar stream = new TokenStream([\n  'a',\n  'b',\n  'c',\n  'd'\n]);\nassert(stream.peek() === 'a');\nassert(stream.lookahead(0) == 'a');\nassert(stream.lookahead(1) == 'b');\n\nassert(stream.advance() === 'a');\nassert(stream.peek() === 'b');\nassert(stream.lookahead(0) == 'b');\nassert(stream.lookahead(1) == 'c');\n\nstream.defer('z');\nassert(stream.peek() === 'z');\nassert(stream.lookahead(0) == 'z');\nassert(stream.lookahead(1) == 'b');\nassert(stream.advance() === 'z');\nassert(stream.advance() === 'b');\nassert(stream.advance() === 'c');\nassert(stream.advance() === 'd');\n\n// an error is thrown if you try and advance beyond the end of the stream\nassert.throws(function () {\n  stream.advance();\n});\n```\n\n## API\n\n### stream.peek()\n\nGets and returns the next item in the stream without advancing the stream's position.\n\n### stream.advance()\n\nReturns the next item in the stream and advances the stream by one item.\n\n### stream.defer(token)\n\nPut a token on the start of the stream (useful if you need to back track after calling advance).\n\n### stream.lookahead(index)\n\nReturn the item at `index` position from the start of the stream, but don't advance the stream.  `stream.lookahead(0)` is equivalent to `stream.peek()`.\n\n## License\n\n  MIT\n","maintainers":[{"email":"forbes@lindesay.co.uk","name":"forbeslindesay"},{"email":"timothygu99@gmail.com","name":"timothygu"}],"time":{"modified":"2023-12-15T12:05:26.110Z","created":"2014-11-20T13:28:14.796Z","0.0.1":"2014-11-20T13:28:14.796Z","1.0.0":"2016-06-01T05:34:32.722Z"},"homepage":"https://github.com/pugjs/token-stream#readme","repository":{"type":"git","url":"git+https://github.com/pugjs/token-stream.git"},"author":{"name":"ForbesLindesay"},"bugs":{"url":"https://github.com/pugjs/token-stream/issues"},"license":"MIT","readmeFilename":"README.md","users":{"robinblomberg":true}}