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rOACCT/node_modules/css-tree/lib/parser/sequence.js
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sequence.js
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			var TYPE = require('../tokenizer').TYPE;
			var WHITESPACE = TYPE.WhiteSpace;
			var COMMENT = TYPE.Comment;

			module.exports = function readSequence(recognizer) {
			var children = this.createList();
			var child = null;
			var context = {
			recognizer: recognizer,
			space: null,
			ignoreWS: false,
			ignoreWSAfter: false
			};

			this.scanner.skipSC();

			while (!this.scanner.eof) {
			switch (this.scanner.tokenType) {
			case COMMENT:
			this.scanner.next();
			continue;

			case WHITESPACE:
			if (context.ignoreWS) {
			this.scanner.next();
			} else {
			context.space = this.WhiteSpace();
			}
			continue;
			}

			child = recognizer.getNode.call(this, context);

			if (child === undefined) {
			break;
			}

			if (context.space !== null) {
			children.push(context.space);
			context.space = null;
			}

			children.push(child);

			if (context.ignoreWSAfter) {
			context.ignoreWSAfter = false;
			context.ignoreWS = true;
			} else {
			context.ignoreWS = false;
			}
			}

			return children;
			};