text:
<!DOCTYPE html>

  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>The source code</title>
  <link href="../prettify/prettify.css" type="text/css" rel="stylesheet" />

/**
 * @class Ext.grid.column.Action
 * @extends Ext.grid.column.Column
 * <p>A Grid header type which renders an icon, or a series of icons in a grid cell, and offers a scoped click
 * handler for each icon.</p>
 *
 * {@img Ext.grid.column.Action/Ext.grid.column.Action.png Ext.grid.column.Action grid column}
 *
 * ## Code
 *     Ext.create('Ext.data.Store', {
 *         storeId:'employeeStore',
 *         fields:['firstname', 'lastname', 'senority', 'dep', 'hired'],
 *         data:[
 *             {firstname:"Michael", lastname:"Scott"},
 *             {firstname:"Dwight", lastname:"Schrute"},
 *             {firstname:"Jim", lastname:"Halpert"},
 *             {firstname:"Kevin", lastname:"Malone"},
 *             {firstname:"Angela", lastname:"Martin"}
 *         ]
 *     });
 *
 *     Ext.create('Ext.grid.Panel', {
 *         title: 'Action Column Demo',
 *         store: Ext.data.StoreManager.lookup('employeeStore'),
 *         columns: [
 *             {text: 'First Name',  dataIndex:'firstname'},
 *             {text: 'Last Name',  dataIndex:'lastname'},
 *             {
 *                 xtype:'actioncolumn',
 *                 width:50,
 *                 items: [{
 *                     icon: 'images/edit.png',  // Use a URL in the icon config
 *                     tooltip: 'Edit',
 *                     handler: function(grid, rowIndex, colIndex) {
 *                         var rec = grid.getStore().getAt(rowIndex);
 *                         alert("Edit " + rec.get('firstname'));
 *                     }
 *                 },{
 *                     icon: 'images/delete.png',
 *                     tooltip: 'Delete',
 *                     handler: function(grid, rowIndex, colIndex) {
 *                         var rec = grid.getStore().getAt(rowIndex);
 *                         alert("Terminate " + rec.get('firstname'));
 *                     }
 *                 }]
 *             }
 *         ],
 *         width: 250,
 *         renderTo: Ext.getBody()
 *     });
 * <p>The action column can be at any index in the columns array, and a grid can have any number of
 * action columns. </p>
 * @xtype actioncolumn
 */
Ext.define('Ext.grid.column.Action', {
    extend: 'Ext.grid.column.Column',
    alias: ['widget.actioncolumn'],
    alternateClassName: 'Ext.grid.ActionColumn',

    /**
     * @cfg {String} icon
     * The URL of an image to display as the clickable element in the column.
     * Optional - defaults to <code>{@link Ext#BLANK_IMAGE_URL Ext.BLANK_IMAGE_URL}</code>.
     */
    /**
     * @cfg {String} iconCls
     * A CSS class to apply to the icon image. To determine the class dynamically, configure the Column with a <code>{@link #getClass}</code> function.
     */
    /**
     * @cfg {Function} handler A function called when the icon is clicked.
     * The handler is passed the following parameters:<div class="mdetail-params"><ul>
     * <li><code>view</code> : TableView<div class="sub-desc">The owning TableView.</div></li>
     * <li><code>rowIndex</code> : Number<div class="sub-desc">The row index clicked on.</div></li>
     * <li><code>colIndex</code> : Number<div class="sub-desc">The column index clicked on.</div></li>
     * <li><code>item</code> : Object<div class="sub-desc">The clicked item (or this Column if multiple
     * {@link #items} were not configured).</div></li>
     * <li><code>e</code> : Event<div class="sub-desc">The click event.</div></li>
     * </ul></div>
     */
    /**
     * @cfg {Object} scope The scope (<tt><b>this</b></tt> reference) in which the <code>{@link #handler}</code>
     * and <code>{@link #getClass}</code> fuctions are executed. Defaults to this Column.
     */
    /**
     * @cfg {String} tooltip A tooltip message to be displayed on hover. {@link Ext.tip.QuickTipManager#init Ext.tip.QuickTipManager} must have
     * been initialized.
     */
    /**
     * @cfg {Boolean} stopSelection Defaults to <code>true</code>. Prevent grid <i>row</i> selection upon mousedown.
     */
    /**
     * @cfg {Function} getClass A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul>
     */
    /**
     * @cfg {Array} items An Array which may contain multiple icon definitions, each element of which may contain:
     * <div class="mdetail-params"><ul>
     * <li><code>icon</code> : String<div class="sub-desc">The url of an image to display as the clickable element
     * in the column.</div></li>
     * <li><code>iconCls</code> : String<div class="sub-desc">A CSS class to apply to the icon image.
     * To determine the class dynamically, configure the item with a <code>getClass</code> function.</div></li>
     * <li><code>getClass</code> : Function<div class="sub-desc">A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></li>
     * <li><code>handler</code> : Function<div class="sub-desc">A function called when the icon is clicked.</div></li>
     * <li><code>scope</code> : Scope<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the
     * <code>handler</code> and <code>getClass</code> functions are executed. Fallback defaults are this Column's
     * configured scope, then this Column.</div></li>
     * <li><code>tooltip</code> : String<div class="sub-desc">A tooltip message to be displayed on hover.
     * {@link Ext.tip.QuickTipManager#init Ext.tip.QuickTipManager} must have been initialized.</div></li>
     * </ul></div>
     */
    header: '&#160;',

    actionIdRe: /x-action-col-(\d+)/,

    /**
     * @cfg {String} altText The alt text to use for the image element. Defaults to <tt>''</tt>.
     */
    altText: '',

    sortable: false,

    constructor: function(config) {
        var me = this,
            cfg = Ext.apply({}, config),
            items = cfg.items || [me],
            l = items.length,
            i,
            item;

        // This is a Container. Delete the items config to be reinstated after construction.
        delete cfg.items;
        me.callParent([cfg]);

        // Items is an array property of ActionColumns
        me.items = items;

//      Renderer closure iterates through items creating an <img> element for each and tagging with an identifying
//      class name x-action-col-{n}
        me.renderer = function(v, meta) {
//          Allow a configured renderer to create initial value (And set the other values in the "metadata" argument!)
            v = Ext.isFunction(cfg.renderer) ? cfg.renderer.apply(this, arguments)||'' : '';

            meta.tdCls += ' ' + Ext.baseCSSPrefix + 'action-col-cell';
            for (i = 0; i < l; i++) {
                item = items[i];
                v += '<img alt="' + me.altText + '" src="' + (item.icon || Ext.BLANK_IMAGE_URL) +
                    '" class="' + Ext.baseCSSPrefix + 'action-col-icon ' + Ext.baseCSSPrefix + 'action-col-' + String(i) + ' ' +  (item.iconCls || '') +
                    ' ' + (Ext.isFunction(item.getClass) ? item.getClass.apply(item.scope||me.scope||me, arguments) : (me.iconCls || '')) + '"' +
                    ((item.tooltip) ? ' data-qtip="' + item.tooltip + '"' : '') + ' />';
            }
            return v;
        };
    },

    destroy: function() {
        delete this.items;
        delete this.renderer;
        return this.callParent(arguments);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     * Also fires any configured click handlers. By default, cancels the mousedown event to prevent selection.
     * Returns the event handler's status to allow canceling of GridView's bubbling process.
     */
    processEvent : function(type, view, cell, recordIndex, cellIndex, e){
        var me = this,
            match = e.getTarget().className.match(me.actionIdRe),
            item, fn;
        if (match) {
            item = me.items[parseInt(match[1], 10)];
            if (item) {
                if (type == 'click') {
                    fn = item.handler || me.handler;
                    if (fn) {
                        fn.call(item.scope || me.scope || me, view, recordIndex, cellIndex, item, e);
                    }
                } else if (type == 'mousedown' && item.stopSelection !== false) {
                    return false;
                }
            }
        }
        return me.callParent(arguments);
    },

    cascade: function(fn, scope) {
        fn.call(scope||this, this);
    },

    // Private override because this cannot function as a Container, and it has an items property which is an Array, NOT a MixedCollection.
    getRefItems: function() {
        return [];
    }
});


text:
""" Test functioning of Python line counters. """

import unittest
from argparse import Namespace

from pysloc import count_lines_python, MapHolder

class TestPyComments(unittest.TestCase):
    """ Test functioning of Python line counters. """

    def setUp(self):
        pass

    def tearDown(self):
        pass

    def test_name_to_func_map(self):
        """ Verify that line counts for known python file are correct. """

        test_file = 'tests/commentsForPy'
        options = Namespace()
        options.already = set()
        options.ex_re = None
        options.map_holder = MapHolder()
        options.verbose = False

        lines, sloc = count_lines_python(test_file, options, 'py')
        self.assertEqual(lines, 29)
        self.assertEqual(sloc, 13)

if __name__ == '__main__':
    unittest.main()

redpajama_set_name: RedPajamaGithub


text:
"""Contains Loss Scale Gradient Tape."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

from tensorflow.python.eager import backprop
from tensorflow.python.ops import array_ops
from tensorflow.python.ops.unconnected_gradients import UnconnectedGradients
from tensorflow.python.training.experimental import loss_scale as loss_scale_module
from tensorflow.python.util import nest
from tensorflow.python.util.tf_export import tf_export

@tf_export("mixed_precision.experimental.LossScaleGradientTape", v1=[])
class LossScaleGradientTape(backprop.GradientTape):
  """A gradient tape that scales losses and unscales resulting gradients.

  Operates as a normal gradient tape, but takes in a
  `tf.mixed_precision.experimental.LossScale` object. Losses are scaled up by
  some amount before the gradients are calculated and the resulting gradients
  are scaled down by the same amount.

  This has no net mathematical effect, but can be used to prevent vanishing
  gradients, for example in the case of mixed precision training.

  If a DynamicLossScale object is used and non-finite gradients are encountered,
  the loss scale will be updated and the gradients recomputed until either
  finite gradients are encountered or the loss scale becomes 1.

  This class should *not* be used with a LossScaleOptimizer, as both classes
  update the LossScale object. Use a non-loss scaling optimizer instead.

  Usage:
  ```
  opt = tf.keras.optimizers.SGD(1.0)
  model_loss_scale = tf.mixed_precision.experimental.DynamicLossScale()

  for step in training_steps:
    with LossScaleGradientTape(model_loss_scale) as tape:
      logits = ...  # Run model and get logits
      loss = tf.nn.softmax_cross_entropy_with_logits(logits=logits,
                                                     labels=labels)
      loss = tf.reduce_mean(loss)
    vars = tape.watched_variables()
    grads = tape.gradient(loss, vars)
    opt.apply_gradients(zip(grads, vars))
  ```
  """

  def __init__(self,
               loss_scale,
               persistent=False,
               watch_accessed_variables=True):
    """Creates a new LossScaleGradientTape.

    Args:
      loss_scale: `tf.mixed_precision.experimental.LossScale` object that
        manages what quantity to scale by. This is typically either a
        FixedLossScale object with a constant scalar or a
        `tf.mixed_precision.experimental.DynamicLossScale` object that will
        adjust the scalar appropriately if any non-finite gradients are
        encountered.
      persistent: Boolean controlling whether a persistent gradient tape is
        created. False by default, which means at most one call can be made to
        the gradient() method on this object.
      watch_accessed_variables: Boolean controlling whether the tape will
        automatically `watch` any (trainable) variables accessed while the tape
        is active. Defaults to True meaning gradients can be requested from any
        result computed in the tape derived from reading a trainable `Variable`.
        If False users must explicitly `watch` any `Variable`s they want to
        request gradients from.
    """
    if not isinstance(loss_scale, loss_scale_module.LossScale):
      raise ValueError("`loss_scale` must be an instance of LossScale.")

    # always make a persistent tape to loop over loss scaling
    super(LossScaleGradientTape, self).__init__(True,
                                                watch_accessed_variables)
    self._outer_persistent = persistent
    self._loss_scale = loss_scale

  def gradient(self,
               target,
               sources,
               output_gradients=None,
               unconnected_gradients=UnconnectedGradients.NONE):
    """Computes the gradient using operations recorded in context of this tape.

    Uses the `LossScale` object provided in the constructor to scale `target`
    and then to unscale the resulting gradients.

    Args:
      target: a list or nested structure of Tensors or Variables to be
        differentiated.
      sources: a list or nested structure of Tensors or Variables. `target` will
        be differentiated against elements in `sources`.
      output_gradients: a list of gradients, one for each element of target.
        Defaults to None.
      unconnected_gradients: a value which can either hold 'none' or 'zero' and
        alters the value which will be returned if the target and sources are
        unconnected. The possible values and effects are detailed in
        'UnconnectedGradients' and it defaults to 'none'.

    Returns:
      a list or nested structure of Tensors (or IndexedSlices, or None),
      one for each element in `sources`. Returned structure is the same as
      the structure of `sources`. If non-finite gradients are encountered
      after dynamic scaling, the loss scale will be updated and the gradients
      recomputed until either finite gradients are encountered or the loss scale
      becomes 1.

    Raises:
      RuntimeError: if called inside the context of the tape, or if called more
       than once on a non-persistent tape.
      ValueError: if the target is a variable or if unconnected gradients is
       called with an unknown value.
    """
    if self._tape is None:  # pylint: disable=access-member-before-definition
      raise RuntimeError("GradientTape.gradient can only be called once on "
                         "non-persistent tapes.")

    ready_to_update = False
    grads = nest.map_structure(array_ops.zeros_like, sources)

    while not ready_to_update and self._loss_scale() > 1:
      with self:  # re-enter the gradient tape so it sees the loss scaling
        loss_scale = self._loss_scale()
        scaled_target = nest.map_structure(lambda t: t * loss_scale, target)

      old_grads = super(LossScaleGradientTape, self).gradient(
          scaled_target, sources, output_gradients, unconnected_gradients)
      inv_loss_scale = 1.0 / self._loss_scale()
      grads = nest.map_structure(lambda g: inv_loss_scale * g, old_grads)
      # Check for non-finite gradients possibly resulting from scaling
      _, ready_to_update = self._loss_scale.update(grads)

    if not self._outer_persistent:
      self._tape = None  # free up resources if a persistent tape was not needed
    return grads


text:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

	<modelVersion>4.0.0</modelVersion>
	<groupId>spr-data</groupId>
	<artifactId>spr-data</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>spr-data</name>

	<build>
		<finalName>dpr-data</finalName>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.2</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
				</configuration>
			</plugin>
		</plugins>
	</build>

	<dependencies>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>4.2.1.Final</version>
		</dependency>
		<dependency>
			<groupId>javax.validation</groupId>
			<artifactId>validation-api</artifactId>
			<version>1.0.0.GA</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-validator</artifactId>
			<version>4.3.0.Final</version>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>4.2.1.Final</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.25</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>3.2.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-jpa</artifactId>
			<version>1.3.2.RELEASE</version>
			<exclusions>
				<exclusion>
					<artifactId>spring-asm</artifactId>
					<groupId>org.springframework</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>

</project>


text:
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

[assembly: AssemblyTitle("Radev.Licensing.PowerShell")]
[assembly: AssemblyDescription("Cmdlets for Microsoft PowerShell integration.")]
[assembly: Guid("c3f9a75c-c200-4a6e-9169-8ffcfe039755")]


text:
FROM python:3.5-alpine
LABEL maintainer "esailer@asu.edu"
COPY requirements.txt /
RUN pip install -r requirements.txt
COPY . /usr/src/app
WORKDIR /usr/src/app
RUN python manage.py collectstatic --noinput
EXPOSE 80
CMD [ "python", "server.py"]


text:
var less, tree;

// Node.js does not have a header file added which defines less
if (less === undefined) {
    less = exports;
    tree = require('./tree');
    less.mode = 'node';
}
//
// less.js - parser
//
//    A relatively straight-forward predictive parser.
//    There is no tokenization/lexing stage, the input is parsed
//    in one sweep.
//
//    To make the parser fast enough to run in the browser, several
//    optimization had to be made:
//
//    - Matching and slicing on a huge input is often cause of slowdowns.
//      The solution is to chunkify the input into smaller strings.
//      The chunks are stored in the `chunks` var,
//      `j` holds the current chunk index, and `current` holds
//      the index of the current chunk in relation to `input`.
//      This gives us an almost 4x speed-up.
//
//    - In many cases, we don't need to match individual tokens;
//      for example, if a value doesn't hold any variables, operations
//      or dynamic references, the parser can effectively 'skip' it,
//      treating it as a literal.
//      An example would be '1px solid #000' - which evaluates to itself,
//      we don't need to know what the individual components are.
//      The drawback, of course is that you don't get the benefits of
//      syntax-checking on the CSS. This gives us a 50% speed-up in the parser,
//      and a smaller speed-up in the code-gen.
//
//
//    Token matching is done with the `$` function, which either takes
//    a terminal string or regexp, or a non-terminal function to call.
//    It also takes care of moving all the indices forwards.
//
//
less.Parser = function Parser(env) {
    var input,       // LeSS input string
        i,           // current index in `input`
        j,           // current chunk
        temp,        // temporarily holds a chunk's state, for backtracking
        memo,        // temporarily holds `i`, when backtracking
        furthest,    // furthest index the parser has gone to
        chunks,      // chunkified input
        current,     // index of current chunk, in `input`
        parser,
        rootFilename = env && env.filename;

    // Top parser on an import tree must be sure there is one "env"
    // which will then be passed around by reference.
    if (!(env instanceof tree.parseEnv)) {
        env = new tree.parseEnv(env);
    }

    var imports = this.imports = {
        paths: env.paths || [],  // Search paths, when importing
        queue: [],               // Files which haven't been imported yet
        files: env.files,        // Holds the imported parse trees
        contents: env.contents,  // Holds the imported file contents
        mime:  env.mime,         // MIME type of .less files
        error: null,             // Error in parsing/evaluating an import
        push: function (path, currentFileInfo, importOptions, callback) {
            var parserImports = this;
            this.queue.push(path);

            var fileParsedFunc = function (e, root, fullPath) {
                parserImports.queue.splice(parserImports.queue.indexOf(path), 1); // Remove the path from the queue

                var importedPreviously = fullPath in parserImports.files || fullPath === rootFilename;

                parserImports.files[fullPath] = root;                        // Store the root

                if (e && !parserImports.error) { parserImports.error = e; }

                callback(e, root, importedPreviously, fullPath);
            };

            if (less.Parser.importer) {
                less.Parser.importer(path, currentFileInfo, fileParsedFunc, env);
            } else {
                less.Parser.fileLoader(path, currentFileInfo, function(e, contents, fullPath, newFileInfo) {
                    if (e) {fileParsedFunc(e); return;}

                    var newEnv = new tree.parseEnv(env);

                    newEnv.currentFileInfo = newFileInfo;
                    newEnv.processImports = false;
                    newEnv.contents[fullPath] = contents;

                    if (currentFileInfo.reference || importOptions.reference) {
                        newFileInfo.reference = true;
                    }

                    if (importOptions.inline) {
                        fileParsedFunc(null, contents, fullPath);
                    } else {
                        new(less.Parser)(newEnv).parse(contents, function (e, root) {
                            fileParsedFunc(e, root, fullPath);
                        });
                    }
                }, env);
            }
        }
    };

    function save()    { temp = chunks[j], memo = i, current = i; }
    function restore() { chunks[j] = temp, i = memo, current = i; }

    function sync() {
        if (i > current) {
            chunks[j] = chunks[j].slice(i - current);
            current = i;
        }
    }
    function isWhitespace(c) {
        // Could change to \s?
        var code = c.charCodeAt(0);
        return code === 32 || code === 10 || code === 9;
    }
    //
    // Parse from a token, regexp or string, and move forward if match
    //
    function $(tok) {
        var match, length;

        //
        // Non-terminal
        //
        if (tok instanceof Function) {
            return tok.call(parser.parsers);
        //
        // Terminal
        //
        //     Either match a single character in the input,
        //     or match a regexp in the current chunk (chunk[j]).
        //
        } else if (typeof(tok) === 'string') {
            match = input.charAt(i) === tok ? tok : null;
            length = 1;
            sync ();
        } else {
            sync ();

            if (match = tok.exec(chunks[j])) {
                length = match[0].length;
            } else {
                return null;
            }
        }

        // The match is confirmed, add the match length to `i`,
        // and consume any extra white-space characters (' ' || '\n')
        // which come after that. The reason for this is that LeSS's
        // grammar is mostly white-space insensitive.
        //
        if (match) {
            skipWhitespace(length);

            if(typeof(match) === 'string') {
                return match;
            } else {
                return match.length === 1 ? match[0] : match;
            }
        }
    }

    function skipWhitespace(length) {
        var oldi = i, oldj = j,
            endIndex = i + chunks[j].length,
            mem = i += length;

        while (i < endIndex) {
            if (! isWhitespace(input.charAt(i))) { break; }
            i++;
        }
        chunks[j] = chunks[j].slice(length + (i - mem));
        current = i;

        if (chunks[j].length === 0 && j < chunks.length - 1) { j++; }

        return oldi !== i || oldj !== j;
    }

    function expect(arg, msg) {
        var result = $(arg);
        if (! result) {
            error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'"
                                                   : "unexpected token"));
        } else {
            return result;
        }
    }

    function error(msg, type) {
        var e = new Error(msg);
        e.index = i;
        e.type = type || 'Syntax';
        throw e;
    }

    // Same as $(), but don't change the state of the parser,
    // just return the match.
    function peek(tok) {
        if (typeof(tok) === 'string') {
            return input.charAt(i) === tok;
        } else {
            return tok.test(chunks[j]);
        }
    }

    function getInput(e, env) {
        if (e.filename && env.currentFileInfo.filename && (e.filename !== env.currentFileInfo.filename)) {
            return parser.imports.contents[e.filename];
        } else {
            return input;
        }
    }

    function getLocation(index, inputStream) {
        var n = index + 1,
            line = null,
            column = -1;

        while (--n >= 0 && inputStream.charAt(n) !== '\n') {
            column++;
        }

        if (typeof index === 'number') {
            line = (inputStream.slice(0, index).match(/\n/g) || "").length;
        }

        return {
            line: line,
            column: column
        };
    }

    function getDebugInfo(index, inputStream, env) {
        var filename = env.currentFileInfo.filename;
        if(less.mode !== 'browser' && less.mode !== 'rhino') {
            filename = require('path').resolve(filename);
        }

        return {
            lineNumber: getLocation(index, inputStream).line + 1,
            fileName: filename
        };
    }

    function LessError(e, env) {
        var input = getInput(e, env),
            loc = getLocation(e.index, input),
            line = loc.line,
            col  = loc.column,
            callLine = e.call && getLocation(e.call, input).line,
            lines = input.split('\n');

        this.type = e.type || 'Syntax';
        this.message = e.message;
        this.filename = e.filename || env.currentFileInfo.filename;
        this.index = e.index;
        this.line = typeof(line) === 'number' ? line + 1 : null;
        this.callLine = callLine + 1;
        this.callExtract = lines[callLine];
        this.stack = e.stack;
        this.column = col;
        this.extract = [
            lines[line - 1],
            lines[line],
            lines[line + 1]
        ];
    }

    LessError.prototype = new Error();
    LessError.prototype.constructor = LessError;

    this.env = env = env || {};

    // The optimization level dictates the thoroughness of the parser,
    // the lower the number, the less nodes it will create in the tree.
    // This could matter for debugging, or if you want to access
    // the individual nodes in the tree.
    this.optimization = ('optimization' in this.env) ? this.env.optimization : 1;

    //
    // The Parser
    //
    return parser = {

        imports: imports,
        //
        // Parse an input string into an abstract syntax tree,
        // call `callback` when done.
        //
        parse: function (str, callback) {
            var root, line, lines, error = null;

            i = j = current = furthest = 0;
            input = str.replace(/\r\n/g, '\n');

            // Remove potential UTF Byte Order Mark
            input = input.replace(/^\uFEFF/, '');

            parser.imports.contents[env.currentFileInfo.filename] = input;

            // Split the input into chunks.
            chunks = (function (chunks) {
                var j = 0,
                    skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g,
                    comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
                    string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
                    level = 0,
                    match,
                    chunk = chunks[0],
                    inParam;

                for (var i = 0, c, cc; i < input.length;) {
                    skip.lastIndex = i;
                    if (match = skip.exec(input)) {
                        if (match.index === i) {
                            i += match[0].length;
                            chunk.push(match[0]);
                        }
                    }
                    c = input.charAt(i);
                    comment.lastIndex = string.lastIndex = i;

                    if (match = string.exec(input)) {
                        if (match.index === i) {
                            i += match[0].length;
                            chunk.push(match[0]);
                            continue;
                        }
                    }

                    if (!inParam && c === '/') {
                        cc = input.charAt(i + 1);
                        if (cc === '/' || cc === '*') {
                            if (match = comment.exec(input)) {
                                if (match.index === i) {
                                    i += match[0].length;
                                    chunk.push(match[0]);
                                    continue;
                                }
                            }
                        }
                    }

                    switch (c) {
                        case '{':
                            if (!inParam) {
                                level++;
                                chunk.push(c);
                                break;
                            }
                            /* falls through */
                        case '}':
                            if (!inParam) {
                                level--;
                                chunk.push(c);
                                chunks[++j] = chunk = [];
                                break;
                            }
                            /* falls through */
                        case '(':
                            if (!inParam) {
                                inParam = true;
                                chunk.push(c);
                                break;
                            }
                            /* falls through */
                        case ')':
                            if (inParam) {
                                inParam = false;
                                chunk.push(c);
                                break;
                            }
                            /* falls through */
                        default:
                            chunk.push(c);
                    }

                    i++;
                }
                if (level !== 0) {
                    error = new(LessError)({
                        index: i-1,
                        type: 'Parse',
                        message: (level > 0) ? "missing closing `}`" : "missing opening `{`",
                        filename: env.currentFileInfo.filename
                    }, env);
                }

                return chunks.map(function (c) { return c.join(''); });
            })([[]]);

            if (error) {
                return callback(new(LessError)(error, env));
            }

            // Start with the primary rule.
            // The whole syntax tree is held under a Ruleset node,
            // with the `root` property set to true, so no `{}` are
            // output. The callback is called when the input is parsed.
            try {
                root = new(tree.Ruleset)([], $(this.parsers.primary));
                root.root = true;
                root.firstRoot = true;
            } catch (e) {
                return callback(new(LessError)(e, env));
            }

            root.toCSS = (function (evaluate) {
                return function (options, variables) {
                    options = options || {};
                    var evaldRoot,
                        css,
                        evalEnv = new tree.evalEnv(options);

                    //
                    // Allows setting variables with a hash, so:
                    //
                    //   `{ color: new(tree.Color)('#f01') }` will become:
                    //
                    //   new(tree.Rule)('@color',
                    //     new(tree.Value)([
                    //       new(tree.Expression)([
                    //         new(tree.Color)('#f01')
                    //       ])
                    //     ])
                    //   )
                    //
                    if (typeof(variables) === 'object' && !Array.isArray(variables)) {
                        variables = Object.keys(variables).map(function (k) {
                            var value = variables[k];

                            if (! (value instanceof tree.Value)) {
                                if (! (value instanceof tree.Expression)) {
                                    value = new(tree.Expression)([value]);
                                }
                                value = new(tree.Value)([value]);
                            }
                            return new(tree.Rule)('@' + k, value, false, null, 0);
                        });
                        evalEnv.frames = [new(tree.Ruleset)(null, variables)];
                    }

                    try {
                        var preEvalVisitors = [],
                            visitors = [
                                new(tree.joinSelectorVisitor)(),
                                new(tree.processExtendsVisitor)(),
                                new(tree.toCSSVisitor)({compress: Boolean(options.compress)})
                            ], i, root = this;

                        if (options.plugins) {
                            for(i =0; i < options.plugins.length; i++) {
                                if (options.plugins[i].isPreEvalVisitor) {
                                    preEvalVisitors.push(options.plugins[i]);
                                } else {
                                    if (options.plugins[i].isPreVisitor) {
                                        visitors.splice(0, 0, options.plugins[i]);
                                    } else {
                                        visitors.push(options.plugins[i]);
                                    }
                                }
                            }
                        }

                        for(i = 0; i < preEvalVisitors.length; i++) {
                            preEvalVisitors[i].run(root);
                        }

                        evaldRoot = evaluate.call(root, evalEnv);

                        for(i = 0; i < visitors.length; i++) {
                            visitors[i].run(evaldRoot);
                        }

                        if (options.sourceMap) {
                            evaldRoot = new tree.sourceMapOutput(
                                {
                                    writeSourceMap: options.writeSourceMap,
                                    rootNode: evaldRoot,
                                    contentsMap: parser.imports.contents,
                                    sourceMapFilename: options.sourceMapFilename,
                                    sourceMapURL: options.sourceMapURL,
                                    outputFilename: options.sourceMapOutputFilename,
                                    sourceMapBasepath: options.sourceMapBasepath,
                                    sourceMapRootpath: options.sourceMapRootpath,
                                    outputSourceFiles: options.outputSourceFiles,
                                    sourceMapGenerator: options.sourceMapGenerator
                                });
                        }

                        css = evaldRoot.toCSS({
                                compress: Boolean(options.compress),
                                dumpLineNumbers: env.dumpLineNumbers,
                                strictUnits: Boolean(options.strictUnits)});
                    } catch (e) {
                        throw new(LessError)(e, env);
                    }

                    if (options.cleancss && less.mode === 'node') {
                        var CleanCSS = require('clean-css');
                        //TODO would be nice for no advanced to be an option
                        return new CleanCSS({keepSpecialComments: '*', processImport: false, noRebase: true, noAdvanced: true}).minify(css);
                    } else if (options.compress) {
                        return css.replace(/(^(\s)+)|((\s)+$)/g, "");
                    } else {
                        return css;
                    }
                };
            })(root.eval);

            // If `i` is smaller than the `input.length - 1`,
            // it means the parser wasn't able to parse the whole
            // string, so we've got a parsing error.
            //
            // We try to extract a \n delimited string,
            // showing the line where the parse error occured.
            // We split it up into two parts (the part which parsed,
            // and the part which didn't), so we can color them differently.
            if (i < input.length - 1) {
                i = furthest;
                var loc = getLocation(i, input);
                lines = input.split('\n');
                line = loc.line + 1;

                error = {
                    type: "Parse",
                    message: "Unrecognised input",
                    index: i,
                    filename: env.currentFileInfo.filename,
                    line: line,
                    column: loc.column,
                    extract: [
                        lines[line - 2],
                        lines[line - 1],
                        lines[line]
                    ]
                };
            }

            var finish = function (e) {
                e = error || e || parser.imports.error;

                if (e) {
                    if (!(e instanceof LessError)) {
                        e = new(LessError)(e, env);
                    }

                    return callback(e);
                }
                else {
                    return callback(null, root);
                }
            };

            if (env.processImports !== false) {
                new tree.importVisitor(this.imports, finish)
                    .run(root);
            } else {
                return finish();
            }
        },

        //
        // Here in, the parsing rules/functions
        //
        // The basic structure of the syntax tree generated is as follows:
        //
        //   Ruleset ->  Rule -> Value -> Expression -> Entity
        //
        // Here's some LESS code:
        //
        //    .class {
        //      color: #fff;
        //      border: 1px solid #000;
        //      width: @w + 4px;
        //      > .child {...}
        //    }
        //
        // And here's what the parse tree might look like:
        //
        //     Ruleset (Selector '.class', [
        //         Rule ("color",  Value ([Expression [Color #fff]]))
        //         Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]]))
        //         Rule ("width",  Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]]))
        //         Ruleset (Selector [Element '>', '.child'], [...])
        //     ])
        //
        //  In general, most rules will try to parse a token with the `$()` function, and if the return
        //  value is truly, will return a new node, of the relevant type. Sometimes, we need to check
        //  first, before parsing, that's when we use `peek()`.
        //
        parsers: {
            //
            // The `primary` rule is the *entry* and *exit* point of the parser.
            // The rules here can appear at any level of the parse tree.
            //
            // The recursive nature of the grammar is an interplay between the `block`
            // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,
            // as represented by this simplified grammar:
            //
            //     primary  →  (ruleset | rule)+
            //     ruleset  →  selector+ block
            //     block    →  '{' primary '}'
            //
            // Only at one point is the primary rule not called from the
            // block rule: at the root level.
            //
            primary: function () {
                var node, root = [];

                while ((node = $(this.extendRule) || $(this.mixin.definition) || $(this.rule)    ||  $(this.ruleset) ||
                               $(this.mixin.call)       || $(this.comment) ||  $(this.directive))
                               || $(/^[\s\n]+/) || $(/^;+/)) {
                    node && root.push(node);
                }
                return root;
            },

            // We create a Comment node for CSS comments `/* */`,
            // but keep the LeSS comments `//` silent, by just skipping
            // over them.
            comment: function () {
                var comment;

                if (input.charAt(i) !== '/') { return; }

                if (input.charAt(i + 1) === '/') {
                    return new(tree.Comment)($(/^\/\/.*/), true, i, env.currentFileInfo);
                } else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) {
                    return new(tree.Comment)(comment, false, i, env.currentFileInfo);
                }
            },

            comments: function () {
                var comment, comments = [];

                while(comment = $(this.comment)) {
                    comments.push(comment);
                }

                return comments;
            },

            //
            // Entities are tokens which can be found inside an Expression
            //
            entities: {
                //
                // A string, which supports escaping " and '
                //
                //     "milky way" 'he\'s the one!'
                //
                quoted: function () {
                    var str, j = i, e, index = i;

                    if (input.charAt(j) === '~') { j++, e = true; } // Escaped strings
                    if (input.charAt(j) !== '"' && input.charAt(j) !== "'") { return; }

                    e && $('~');

                    if (str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/)) {
                        return new(tree.Quoted)(str[0], str[1] || str[2], e, index, env.currentFileInfo);
                    }
                },

                //
                // A catch-all word, such as:
                //
                //     black border-collapse
                //
                keyword: function () {
                    var k;

                    if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) {
                        var color = tree.Color.fromKeyword(k);
                        if (color) {
                            return color;
                        }
                        return new(tree.Keyword)(k);
                    }
                },

                //
                // A function call
                //
                //     rgb(255, 0, 255)
                //
                // We also try to catch IE's `alpha()`, but let the `alpha` parser
                // deal with the details.
                //
                // The arguments are parsed with the `entities.arguments` parser.
                //
                call: function () {
                    var name, nameLC, args, alpha_ret, index = i;

                    if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) { return; }

                    name = name[1];
                    nameLC = name.toLowerCase();

                    if (nameLC === 'url') { return null; }
                    else                  { i += name.length; }

                    if (nameLC === 'alpha') {
                        alpha_ret = $(this.alpha);
                        if(typeof alpha_ret !== 'undefined') {
                            return alpha_ret;
                        }
                    }

                    $('('); // Parse the '(' and consume whitespace.

                    args = $(this.entities.arguments);

                    if (! $(')')) {
                        return;
                    }

                    if (name) { return new(tree.Call)(name, args, index, env.currentFileInfo); }
                },
                arguments: function () {
                    var args = [], arg;

                    while (arg = $(this.entities.assignment) || $(this.expression)) {
                        args.push(arg);
                        if (! $(',')) {
                            break;
                        }
                    }
                    return args;
                },
                literal: function () {
                    return $(this.entities.dimension) ||
                           $(this.entities.color) ||
                           $(this.entities.quoted) ||
                           $(this.entities.unicodeDescriptor);
                },

                // Assignments are argument entities for calls.
                // They are present in ie filter properties as shown below.
                //
                //     filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )
                //

                assignment: function () {
                    var key, value;
                    if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) {
                        return new(tree.Assignment)(key, value);
                    }
                },

                //
                // Parse url() tokens
                //
                // We use a specific rule for urls, because they don't really behave like
                // standard function calls. The difference is that the argument doesn't have
                // to be enclosed within a string, so it can't be parsed as an Expression.
                //
                url: function () {
                    var value;

                    if (input.charAt(i) !== 'u' || !$(/^url\(/)) {
                        return;
                    }

                    value = $(this.entities.quoted)  || $(this.entities.variable) ||
                            $(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || "";

                    expect(')');

                    /*jshint eqnull:true */
                    return new(tree.URL)((value.value != null || value instanceof tree.Variable)
                                        ? value : new(tree.Anonymous)(value), env.currentFileInfo);
                },

                //
                // A Variable entity, such as `@fink`, in
                //
                //     width: @fink + 2px
                //
                // We use a different parser for variable definitions,
                // see `parsers.variable`.
                //
                variable: function () {
                    var name, index = i;

                    if (input.charAt(i) === '@' && (name = $(/^@@?[\w-]+/))) {
                        return new(tree.Variable)(name, index, env.currentFileInfo);
                    }
                },

                // A variable entity useing the protective {} e.g. @{var}
                variableCurly: function () {
                    var curly, index = i;

                    if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) {
                        return new(tree.Variable)("@" + curly[1], index, env.currentFileInfo);
                    }
                },

                //
                // A Hexadecimal color
                //
                //     #4F3C2F
                //
                // `rgb` and `hsl` colors are parsed through the `entities.call` parser.
                //
                color: function () {
                    var rgb;

                    if (input.charAt(i) === '#' && (rgb = $(/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/))) {
                        return new(tree.Color)(rgb[1]);
                    }
                },

                //
                // A Dimension, that is, a number and a unit
                //
                //     0.5em 95%
                //
                dimension: function () {
                    var value, c = input.charCodeAt(i);
                    //Is the first char of the dimension 0-9, '.', '+' or '-'
                    if ((c > 57 || c < 43) || c === 47 || c == 44) {
                        return;
                    }

                    if (value = $(/^([+-]?\d*\.?\d+)(%|[a-z]+)?/)) {
                        return new(tree.Dimension)(value[1], value[2]);
                    }
                },

                //
                // A unicode descriptor, as is used in unicode-range
                //
                // U+0??  or U+00A1-00A9
                //
                unicodeDescriptor: function () {
                    var ud;

                    if (ud = $(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/)) {
                        return new(tree.UnicodeDescriptor)(ud[0]);
                    }
                },

                //
                // JavaScript code to be evaluated
                //
                //     `window.location.href`
                //
                javascript: function () {
                    var str, j = i, e;

                    if (input.charAt(j) === '~') { j++; e = true; } // Escaped strings
                    if (input.charAt(j) !== '`') { return; }
                    if (env.javascriptEnabled !== undefined && !env.javascriptEnabled) {
                        error("You are using JavaScript, which has been disabled.");
                    }

                    if (e) { $('~'); }

                    if (str = $(/^`([^`]*)`/)) {
                        return new(tree.JavaScript)(str[1], i, e);
                    }
                }
            },

            //
            // The variable part of a variable definition. Used in the `rule` parser
            //
            //     @fink:
            //
            variable: function () {
                var name;

                if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1]; }
            },

            //
            // extend syntax - used to extend selectors
            //
            extend: function(isRule) {
                var elements, e, index = i, option, extendList = [];

                if (!$(isRule ? /^&:extend\(/ : /^:extend\(/)) { return; }

                do {
                    option = null;
                    elements = [];
                    while (true) {
                        option = $(/^(all)(?=\s*(\)|,))/);
                        if (option) { break; }
                        e = $(this.element);
                        if (!e) { break; }
                        elements.push(e);
                    }

                    option = option && option[1];

                    extendList.push(new(tree.Extend)(new(tree.Selector)(elements), option, index));

                } while($(","));

                expect(/^\)/);

                if (isRule) {
                    expect(/^;/);
                }

                return extendList;
            },

            //
            // extendRule - used in a rule to extend all the parent selectors
            //
            extendRule: function() {
                return this.extend(true);
            },

            //
            // Mixins
            //
            mixin: {
                //
                // A Mixin call, with an optional argument list
                //
                //     #mixins > .square(#fff);
                //     .rounded(4px, black);
                //     .button;
                //
                // The `while` loop is there because mixins can be
                // namespaced, but we only support the child and descendant
                // selector for now.
                //
                call: function () {
                    var elements = [], e, c, args, index = i, s = input.charAt(i), important = false;

                    if (s !== '.' && s !== '#') { return; }

                    save(); // stop us absorbing part of an invalid selector

                    while (e = $(/^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/)) {
                        elements.push(new(tree.Element)(c, e, i, env.currentFileInfo));
                        c = $('>');
                    }
                    if ($('(')) {
                        args = this.mixin.args.call(this, true).args;
                        expect(')');
                    }

                    args = args || [];

                    if ($(this.important)) {
                        important = true;
                    }

                    if (elements.length > 0 && ($(';') || peek('}'))) {
                        return new(tree.mixin.Call)(elements, args, index, env.currentFileInfo, important);
                    }

                    restore();
                },
                args: function (isCall) {
                    var expressions = [], argsSemiColon = [], isSemiColonSeperated, argsComma = [], expressionContainsNamed, name, nameLoop, value, arg,
                        returner = {args:null, variadic: false};
                    while (true) {
                        if (isCall) {
                            arg = $(this.expression);
                        } else {
                            $(this.comments);
                            if (input.charAt(i) === '.' && $(/^\.{3}/)) {
                                returner.variadic = true;
                                if ($(";") && !isSemiColonSeperated) {
                                    isSemiColonSeperated = true;
                                }
                                (isSemiColonSeperated ? argsSemiColon : argsComma)
                                    .push({ variadic: true });
                                break;
                            }
                            arg = $(this.entities.variable) || $(this.entities.literal)
                                || $(this.entities.keyword);
                        }

                        if (!arg) {
                            break;
                        }

                        nameLoop = null;
                        if (arg.throwAwayComments) {
                            arg.throwAwayComments();
                        }
                        value = arg;
                        var val = null;

                        if (isCall) {
                            // Variable
                            if (arg.value.length == 1) {
                                val = arg.value[0];
                            }
                        } else {
                            val = arg;
                        }

                        if (val && val instanceof tree.Variable) {
                            if ($(':')) {
                                if (expressions.length > 0) {
                                    if (isSemiColonSeperated) {
                                        error("Cannot mix ; and , as delimiter types");
                                    }
                                    expressionContainsNamed = true;
                                }
                                value = expect(this.expression);
                                nameLoop = (name = val.name);
                            } else if (!isCall && $(/^\.{3}/)) {
                                returner.variadic = true;
                                if ($(";") && !isSemiColonSeperated) {
                                    isSemiColonSeperated = true;
                                }
                                (isSemiColonSeperated ? argsSemiColon : argsComma)
                                    .push({ name: arg.name, variadic: true });
                                break;
                            } else if (!isCall) {
                                name = nameLoop = val.name;
                                value = null;
                            }
                        }

                        if (value) {
                            expressions.push(value);
                        }

                        argsComma.push({ name:nameLoop, value:value });

                        if ($(',')) {
                            continue;
                        }

                        if ($(';') || isSemiColonSeperated) {

                            if (expressionContainsNamed) {
                                error("Cannot mix ; and , as delimiter types");
                            }

                            isSemiColonSeperated = true;

                            if (expressions.length > 1) {
                                value = new(tree.Value)(expressions);
                            }
                            argsSemiColon.push({ name:name, value:value });

                            name = null;
                            expressions = [];
                            expressionContainsNamed = false;
                        }
                    }

                    returner.args = isSemiColonSeperated ? argsSemiColon : argsComma;
                    return returner;
                },
                //
                // A Mixin definition, with a list of parameters
                //
                //     .rounded (@radius: 2px, @color) {
                //        ...
                //     }
                //
                // Until we have a finer grained state-machine, we have to
                // do a look-ahead, to make sure we don't have a mixin call.
                // See the `rule` function for more information.
                //
                // We start by matching `.rounded (`, and then proceed on to
                // the argument list, which has optional default values.
                // We store the parameters in `params`, with a `value` key,
                // if there is a value, such as in the case of `@radius`.
                //
                // Once we've got our params list, and a closing `)`, we parse
                // the `{...}` block.
                //
                definition: function () {
                    var name, params = [], match, ruleset, cond, variadic = false;
                    if ((input.charAt(i) !== '.' && input.charAt(i) !== '#') ||
                        peek(/^[^{]*\}/)) {
                        return;
                    }

                    save();

                    if (match = $(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/)) {
                        name = match[1];

                        var argInfo = this.mixin.args.call(this, false);
                        params = argInfo.args;
                        variadic = argInfo.variadic;

                        // .mixincall("@{a}");
                        // looks a bit like a mixin definition.. so we have to be nice and restore
                        if (!$(')')) {
                            furthest = i;
                            restore();
                        }

                        $(this.comments);

                        if ($(/^when/)) { // Guard
                            cond = expect(this.conditions, 'expected condition');
                        }

                        ruleset = $(this.block);

                        if (ruleset) {
                            return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);
                        } else {
                            restore();
                        }
                    }
                }
            },

            //
            // Entities are the smallest recognized token,
            // and can be found inside a rule's value.
            //
            entity: function () {
                return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) ||
                       $(this.entities.call)    || $(this.entities.keyword)  ||$(this.entities.javascript) ||
                       $(this.comment);
            },

            //
            // A Rule terminator. Note that we use `peek()` to check for '}',
            // because the `block` rule will be expecting it, but we still need to make sure
            // it's there, if ';' was ommitted.
            //
            end: function () {
                return $(';') || peek('}');
            },

            //
            // IE's alpha function
            //
            //     alpha(opacity=88)
            //
            alpha: function () {
                var value;

                if (! $(/^\(opacity=/i)) { return; }
                if (value = $(/^\d+/) || $(this.entities.variable)) {
                    expect(')');
                    return new(tree.Alpha)(value);
                }
            },

            //
            // A Selector Element
            //
            //     div
            //     + h1
            //     #socks
            //     input[type="text"]
            //
            // Elements are the building blocks for Selectors,
            // they are made out of a `Combinator` (see combinator rule),
            // and an element name, such as a tag a class, or `*`.
            //
            element: function () {
                var e, c, v;

                c = $(this.combinator);

                e = $(/^(?:\d+\.\d+|\d+)%/) || $(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||
                    $('*') || $('&') || $(this.attribute) || $(/^\([^()@]+\)/) || $(/^[\.#](?=@)/) || $(this.entities.variableCurly);

                if (! e) {
                    if ($('(')) {
                        if ((v = ($(this.selector))) &&
                                $(')')) {
                            e = new(tree.Paren)(v);
                        }
                    }
                }

                if (e) { return new(tree.Element)(c, e, i, env.currentFileInfo); }
            },

            //
            // Combinators combine elements together, in a Selector.
            //
            // Because our parser isn't white-space sensitive, special care
            // has to be taken, when parsing the descendant combinator, ` `,
            // as it's an empty space. We have to check the previous character
            // in the input, to see if it's a ` ` character. More info on how
            // we deal with this in *combinator.js*.
            //
            combinator: function () {
                var c = input.charAt(i);

                if (c === '>' || c === '+' || c === '~' || c === '|') {
                    i++;
                    while (input.charAt(i).match(/\s/)) { i++; }
                    return new(tree.Combinator)(c);
                } else if (input.charAt(i - 1).match(/\s/)) {
                    return new(tree.Combinator)(" ");
                } else {
                    return new(tree.Combinator)(null);
                }
            },
            //
            // A CSS selector (see selector below)
            // with less extensions e.g. the ability to extend and guard
            //
            lessSelector: function () {
                return this.selector(true);
            },
            //
            // A CSS Selector
            //
            //     .class > div + h1
            //     li a:hover
            //
            // Selectors are made out of one or more Elements, see above.
            //
            selector: function (isLess) {
                var e, elements = [], c, extend, extendList = [], when, condition;

                while ((isLess && (extend = $(this.extend))) || (isLess && (when = $(/^when/))) || (e = $(this.element))) {
                    if (when) {
                        condition = expect(this.conditions, 'expected condition');
                    } else if (condition) {
                        error("CSS guard can only be used at the end of selector");
                    } else if (extend) {
                        extendList.push.apply(extendList, extend);
                    } else {
                        if (extendList.length) {
                            error("Extend can only be used at the end of selector");
                        }
                        c = input.charAt(i);
                        elements.push(e);
                        e = null;
                    }
                    if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {
                        break;
                    }
                }

                if (elements.length > 0) { return new(tree.Selector)(elements, extendList, condition, i, env.currentFileInfo); }
                if (extendList.length) { error("Extend must be used to extend a selector, it cannot be used on its own"); }
            },
            attribute: function () {
                var key, val, op;

                if (! $('[')) { return; }

                if (!(key = $(this.entities.variableCurly))) {
                    key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/);
                }

                if ((op = $(/^[|~*$^]?=/))) {
                    val = $(this.entities.quoted) || $(/^[0-9]+%/) || $(/^[\w-]+/) || $(this.entities.variableCurly);
                }

                expect(']');

                return new(tree.Attribute)(key, op, val);
            },

            //
            // The `block` rule is used by `ruleset` and `mixin.definition`.
            // It's a wrapper around the `primary` rule, with added `{}`.
            //
            block: function () {
                var content;
                if ($('{') && (content = $(this.primary)) && $('}')) {
                    return content;
                }
            },

            //
            // div, .class, body > p {...}
            //
            ruleset: function () {
                var selectors = [], s, rules, debugInfo;

                save();

                if (env.dumpLineNumbers) {
                    debugInfo = getDebugInfo(i, input, env);
                }

                while (s = $(this.lessSelector)) {
                    selectors.push(s);
                    $(this.comments);
                    if (! $(',')) { break; }
                    if (s.condition) {
                        error("Guards are only currently allowed on a single selector.");
                    }
                    $(this.comments);
                }

                if (selectors.length > 0 && (rules = $(this.block))) {
                    var ruleset = new(tree.Ruleset)(selectors, rules, env.strictImports);
                    if (env.dumpLineNumbers) {
                        ruleset.debugInfo = debugInfo;
                    }
                    return ruleset;
                } else {
                    // Backtrack
                    furthest = i;
                    restore();
                }
            },
            rule: function (tryAnonymous) {
                var name, value, c = input.charAt(i), important, merge = false;
                save();

                if (c === '.' || c === '#' || c === '&') { return; }

                if (name = $(this.variable) || $(this.ruleProperty)) {
                    // prefer to try to parse first if its a variable or we are compressing
                    // but always fallback on the other one
                    value = !tryAnonymous && (env.compress || (name.charAt(0) === '@')) ?
                        ($(this.value) || $(this.anonymousValue)) :
                        ($(this.anonymousValue) || $(this.value));

                    important = $(this.important);
                    if (name[name.length-1] === "+") {
                        merge = true;
                        name = name.substr(0, name.length - 1);
                    }

                    if (value && $(this.end)) {
                        return new (tree.Rule)(name, value, important, merge, memo, env.currentFileInfo);
                    } else {
                        furthest = i;
                        restore();
                        if (value && !tryAnonymous) {
                            return this.rule(true);
                        }
                    }
                }
            },
            anonymousValue: function () {
                var match;
                if (match = /^([^@+\/'"*`(;{}-]*);/.exec(chunks[j])) {
                    i += match[0].length - 1;
                    return new(tree.Anonymous)(match[1]);
                }
            },

            //
            // An @import directive
            //
            //     @import "lib";
            //
            // Depending on our environemnt, importing is done differently:
            // In the browser, it's an XHR request, in Node, it would be a
            // file-system operation. The function used for importing is
            // stored in `import`, which we pass to the Import constructor.
            //
            "import": function () {
                var path, features, index = i;

                save();

                var dir = $(/^@import?\s+/);

                var options = (dir ? $(this.importOptions) : null) || {};

                if (dir && (path = $(this.entities.quoted) || $(this.entities.url))) {
                    features = $(this.mediaFeatures);
                    if ($(';')) {
                        features = features && new(tree.Value)(features);
                        return new(tree.Import)(path, features, options, index, env.currentFileInfo);
                    }
                }

                restore();
            },

            importOptions: function() {
                var o, options = {}, optionName, value;

                // list of options, surrounded by parens
                if (! $('(')) { return null; }
                do {
                    if (o = $(this.importOption)) {
                        optionName = o;
                        value = true;
                        switch(optionName) {
                            case "css":
                                optionName = "less";
                                value = false;
                            break;
                            case "once":
                                optionName = "multiple";
                                value = false;
                            break;
                        }
                        options[optionName] = value;
                        if (! $(',')) { break; }
                    }
                } while (o);
                expect(')');
                return options;
            },

            importOption: function() {
                var opt = $(/^(less|css|multiple|once|inline|reference)/);
                if (opt) {
                    return opt[1];
                }
            },

            mediaFeature: function () {
                var e, p, nodes = [];

                do {
                    if (e = ($(this.entities.keyword) || $(this.entities.variable))) {
                        nodes.push(e);
                    } else if ($('(')) {
                        p = $(this.property);
                        e = $(this.value);
                        if ($(')')) {
                            if (p && e) {
                                nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, null, i, env.currentFileInfo, true)));
                            } else if (e) {
                                nodes.push(new(tree.Paren)(e));
                            } else {
                                return null;
                            }
                        } else { return null; }
                    }
                } while (e);

                if (nodes.length > 0) {
                    return new(tree.Expression)(nodes);
                }
            },

            mediaFeatures: function () {
                var e, features = [];

                do {
                  if (e = $(this.mediaFeature)) {
                      features.push(e);
                      if (! $(',')) { break; }
                  } else if (e = $(this.entities.variable)) {
                      features.push(e);
                      if (! $(',')) { break; }
                  }
                } while (e);

                return features.length > 0 ? features : null;
            },

            media: function () {
                var features, rules, media, debugInfo;

                if (env.dumpLineNumbers) {
                    debugInfo = getDebugInfo(i, input, env);
                }

                if ($(/^@media/)) {
                    features = $(this.mediaFeatures);

                    if (rules = $(this.block)) {
                        media = new(tree.Media)(rules, features, i, env.currentFileInfo);
                        if (env.dumpLineNumbers) {
                            media.debugInfo = debugInfo;
                        }
                        return media;
                    }
                }
            },

            //
            // A CSS Directive
            //
            //     @charset "utf-8";
            //
            directive: function () {
                var name, value, rules, nonVendorSpecificName,
                    hasBlock, hasIdentifier, hasExpression, identifier;

                if (input.charAt(i) !== '@') { return; }

                if (value = $(this['import']) || $(this.media)) {
                    return value;
                }

                save();

                name = $(/^@[a-z-]+/);

                if (!name) { return; }

                nonVendorSpecificName = name;
                if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {
                    nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1);
                }

                switch(nonVendorSpecificName) {
                    case "@font-face":
                        hasBlock = true;
                        break;
                    case "@viewport":
                    case "@top-left":
                    case "@top-left-corner":
                    case "@top-center":
                    case "@top-right":
                    case "@top-right-corner":
                    case "@bottom-left":
                    case "@bottom-left-corner":
                    case "@bottom-center":
                    case "@bottom-right":
                    case "@bottom-right-corner":
                    case "@left-top":
                    case "@left-middle":
                    case "@left-bottom":
                    case "@right-top":
                    case "@right-middle":
                    case "@right-bottom":
                        hasBlock = true;
                        break;
                    case "@host":
                    case "@page":
                    case "@document":
                    case "@supports":
                    case "@keyframes":
                        hasBlock = true;
                        hasIdentifier = true;
                        break;
                    case "@namespace":
                        hasExpression = true;
                        break;
                }

                if (hasIdentifier) {
                    identifier = ($(/^[^{]+/) || '').trim();
                    if (identifier) {
                        name += " " + identifier;
                    }
                }

                if (hasBlock)
                {
                    if (rules = $(this.block)) {
                        return new(tree.Directive)(name, rules, i, env.currentFileInfo);
                    }
                } else {
                    if ((value = hasExpression ? $(this.expression) : $(this.entity)) && $(';')) {
                        var directive = new(tree.Directive)(name, value, i, env.currentFileInfo);
                        if (env.dumpLineNumbers) {
                            directive.debugInfo = getDebugInfo(i, input, env);
                        }
                        return directive;
                    }
                }

                restore();
            },

            //
            // A Value is a comma-delimited list of Expressions
            //
            //     font-family: Baskerville, Georgia, serif;
            //
            // In a Rule, a Value represents everything after the `:`,
            // and before the `;`.
            //
            value: function () {
                var e, expressions = [];

                while (e = $(this.expression)) {
                    expressions.push(e);
                    if (! $(',')) { break; }
                }

                if (expressions.length > 0) {
                    return new(tree.Value)(expressions);
                }
            },
            important: function () {
                if (input.charAt(i) === '!') {
                    return $(/^! *important/);
                }
            },
            sub: function () {
                var a, e;

                if ($('(')) {
                    if (a = $(this.addition)) {
                        e = new(tree.Expression)([a]);
                        expect(')');
                        e.parens = true;
                        return e;
                    }
                }
            },
            multiplication: function () {
                var m, a, op, operation, isSpaced;
                if (m = $(this.operand)) {
                    isSpaced = isWhitespace(input.charAt(i - 1));
                    while (!peek(/^\/[*\/]/) && (op = ($('/') || $('*')))) {
                        if (a = $(this.operand)) {
                            m.parensInOp = true;
                            a.parensInOp = true;
                            operation = new(tree.Operation)(op, [operation || m, a], isSpaced);
                            isSpaced = isWhitespace(input.charAt(i - 1));
                        } else {
                            break;
                        }
                    }
                    return operation || m;
                }
            },
            addition: function () {
                var m, a, op, operation, isSpaced;
                if (m = $(this.multiplication)) {
                    isSpaced = isWhitespace(input.charAt(i - 1));
                    while ((op = $(/^[-+]\s+/) || (!isSpaced && ($('+') || $('-')))) &&
                           (a = $(this.multiplication))) {
                        m.parensInOp = true;
                        a.parensInOp = true;
                        operation = new(tree.Operation)(op, [operation || m, a], isSpaced);
                        isSpaced = isWhitespace(input.charAt(i - 1));
                    }
                    return operation || m;
                }
            },
            conditions: function () {
                var a, b, index = i, condition;

                if (a = $(this.condition)) {
                    while (peek(/^,\s*(not\s*)?\(/) && $(',') && (b = $(this.condition))) {
                        condition = new(tree.Condition)('or', condition || a, b, index);
                    }
                    return condition || a;
                }
            },
            condition: function () {
                var a, b, c, op, index = i, negate = false;

                if ($(/^not/)) { negate = true; }
                expect('(');
                if (a = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
                    if (op = $(/^(?:>=|<=|=<|[<=>])/)) {
                        if (b = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
                            c = new(tree.Condition)(op, a, b, index, negate);
                        } else {
                            error('expected expression');
                        }
                    } else {
                        c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, negate);
                    }
                    expect(')');
                    return $(/^and/) ? new(tree.Condition)('and', c, $(this.condition)) : c;
                }
            },

            //
            // An operand is anything that can be part of an operation,
            // such as a Color, or a Variable
            //
            operand: function () {
                var negate, p = input.charAt(i + 1);

                if (input.charAt(i) === '-' && (p === '@' || p === '(')) { negate = $('-'); }
                var o = $(this.sub) || $(this.entities.dimension) ||
                        $(this.entities.color) || $(this.entities.variable) ||
                        $(this.entities.call);

                if (negate) {
                    o.parensInOp = true;
                    o = new(tree.Negative)(o);
                }

                return o;
            },

            //
            // Expressions either represent mathematical operations,
            // or white-space delimited Entities.
            //
            //     1px solid black
            //     @var * 2
            //
            expression: function () {
                var e, delim, entities = [];

                while (e = $(this.addition) || $(this.entity)) {
                    entities.push(e);
                    // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here
                    if (!peek(/^\/[\/*]/) && (delim = $('/'))) {
                        entities.push(new(tree.Anonymous)(delim));
                    }
                }
                if (entities.length > 0) {
                    return new(tree.Expression)(entities);
                }
            },
            property: function () {
                var name;

                if (name = $(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/)) {
                    return name[1];
                }
            },
            ruleProperty: function () {
                var name;

                if (name = $(/^(\*?-?[_a-zA-Z0-9-]+)\s*(\+?)\s*:/)) {
                    return name[1] + (name[2] || "");
                }
            }
        }
    };
};


text:
class AddReadStateToThreddedPrivateUsers < ActiveRecord::Migration
  def change
    add_column :thredded_private_users, :read, :boolean, default: false
    add_index :thredded_private_users, :read
  end
end


text:
COUNT=$1

for i in $(seq 1 $COUNT)
do
   ./cacheflush
done


text:
<?xml version="1.0" encoding="utf-8"?>
<ldml xmlns:sil="urn://www.sil.org/ldml/0.1">
	<identity>
		<version number="0.0.1"/>
		<generation date="2018-11-20 23:26:15"/>
		<language type="tnc"/>
		<special>
			<sil:identity defaultRegion="CO" script="Latn" draft="generated"/>
		</special>
	</identity>
	<localeDisplayNames>
		<special>
			<sil:names>
				<sil:name xml:lang="en">Tanimuca-Retuarã</sil:name>
			</sil:names>
		</special>
	</localeDisplayNames>
	<layout>
		<orientation>
			<characterOrder>left-to-right</characterOrder>
		</orientation>
	</layout>
	<characters>
		<exemplarCharacters>[a á b c d e f g h ꞌ i j k l m n o ᵽ q r s t u v w x y z é í ó p ú \u0303]</exemplarCharacters>
		<exemplarCharacters alt="proposed-dbl" draft="suspect">[A-OQ-Za-oq-z\u00C3\u00D1\u00D5\u00E3\u00F1\u00F5\u0128\u0129\u0168\u0169\u1D7D\u1EBC\u1EBD\u2C63\uA78C]</exemplarCharacters>
		<exemplarCharacters type="punctuation">[\- – — , ; \: ! ¡ ? ¿ . ' ' " " ( )]</exemplarCharacters>
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		<exemplarCharacters type="index">[A Á B C D E F G H I J K L M N O Ᵽ Q R S T U V W X Y Z É Í Ó P Ú Ꞌ]</exemplarCharacters>
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text:
OsmAnd 1.7 Released

July 17, 2014

OsmAnd 1.7 is coming. The biggest breakthrough of this release is a new route planning mode, after any Directions action, which is designed to quickly change start and destination point, tweak parameters and see immediate route recalculation.

One of the major changes is route calculation engine. It is completely rebuild and gives precise route based on routing parameters.

To take advantage of all features of new route calculation, maps should be updated as March 2014.

GPX route calculation is moved under Route Settings button and feature of 'Pass the whole track' enables OsmAnd navigation, so you will always get map instructions even if you deviated from the route.

Active tunnel simulation (long waiting feature)

Speech rate setting (accessibility)

Lots of small & handy features