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+var assignInWith = require('./assignInWith'),
+ attempt = require('./attempt'),
+ baseValues = require('./_baseValues'),
+ customDefaultsAssignIn = require('./_customDefaultsAssignIn'),
+ escapeStringChar = require('./_escapeStringChar'),
+ isError = require('./isError'),
+ isIterateeCall = require('./_isIterateeCall'),
+ keys = require('./keys'),
+ reInterpolate = require('./_reInterpolate'),
+ templateSettings = require('./templateSettings'),
+ toString = require('./toString');
+
+/** Used to match empty string literals in compiled template source. */
+var reEmptyStringLeading = /\b__p \+= '';/g,
+ reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+ reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+
+/**
+ * Used to match
+ * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+ */
+var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+
+/** Used to ensure capturing order of template delimiters. */
+var reNoMatch = /($^)/;
+
+/** Used to match unescaped characters in compiled string literals. */
+var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Creates a compiled template function that can interpolate data properties
+ * in "interpolate" delimiters, HTML-escape interpolated data properties in
+ * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+ * properties may be accessed as free variables in the template. If a setting
+ * object is given, it takes precedence over `_.templateSettings` values.
+ *
+ * **Note:** In the development build `_.template` utilizes
+ * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+ * for easier debugging.
+ *
+ * For more information on precompiling templates see
+ * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+ *
+ * For more information on Chrome extension sandboxes see
+ * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The template string.
+ * @param {Object} [options={}] The options object.
+ * @param {RegExp} [options.escape=_.templateSettings.escape]
+ * The HTML "escape" delimiter.
+ * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+ * The "evaluate" delimiter.
+ * @param {Object} [options.imports=_.templateSettings.imports]
+ * An object to import into the template as free variables.
+ * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+ * The "interpolate" delimiter.
+ * @param {string} [options.sourceURL='templateSources[n]']
+ * The sourceURL of the compiled template.
+ * @param {string} [options.variable='obj']
+ * The data object variable name.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Function} Returns the compiled template function.
+ * @example
+ *
+ * // Use the "interpolate" delimiter to create a compiled template.
+ * var compiled = _.template('hello <%= user %>!');
+ * compiled({ 'user': 'fred' });
+ * // => 'hello fred!'
+ *
+ * // Use the HTML "escape" delimiter to escape data property values.
+ * var compiled = _.template('<b><%- value %></b>');
+ * compiled({ 'value': '<script>' });
+ * // => '<b>&lt;script&gt;</b>'
+ *
+ * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
+ * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
+ * compiled({ 'users': ['fred', 'barney'] });
+ * // => '<li>fred</li><li>barney</li>'
+ *
+ * // Use the internal `print` function in "evaluate" delimiters.
+ * var compiled = _.template('<% print("hello " + user); %>!');
+ * compiled({ 'user': 'barney' });
+ * // => 'hello barney!'
+ *
+ * // Use the ES template literal delimiter as an "interpolate" delimiter.
+ * // Disable support by replacing the "interpolate" delimiter.
+ * var compiled = _.template('hello ${ user }!');
+ * compiled({ 'user': 'pebbles' });
+ * // => 'hello pebbles!'
+ *
+ * // Use backslashes to treat delimiters as plain text.
+ * var compiled = _.template('<%= "\\<%- value %\\>" %>');
+ * compiled({ 'value': 'ignored' });
+ * // => '<%- value %>'
+ *
+ * // Use the `imports` option to import `jQuery` as `jq`.
+ * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
+ * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
+ * compiled({ 'users': ['fred', 'barney'] });
+ * // => '<li>fred</li><li>barney</li>'
+ *
+ * // Use the `sourceURL` option to specify a custom sourceURL for the template.
+ * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
+ * compiled(data);
+ * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
+ *
+ * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
+ * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
+ * compiled.source;
+ * // => function(data) {
+ * // var __t, __p = '';
+ * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
+ * // return __p;
+ * // }
+ *
+ * // Use custom template delimiters.
+ * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
+ * var compiled = _.template('hello {{ user }}!');
+ * compiled({ 'user': 'mustache' });
+ * // => 'hello mustache!'
+ *
+ * // Use the `source` property to inline compiled templates for meaningful
+ * // line numbers in error messages and stack traces.
+ * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
+ * var JST = {\
+ * "main": ' + _.template(mainText).source + '\
+ * };\
+ * ');
+ */
+function template(string, options, guard) {
+ // Based on John Resig's `tmpl` implementation
+ // (http://ejohn.org/blog/javascript-micro-templating/)
+ // and Laura Doktorova's doT.js (https://github.com/olado/doT).
+ var settings = templateSettings.imports._.templateSettings || templateSettings;
+
+ if (guard && isIterateeCall(string, options, guard)) {
+ options = undefined;
+ }
+ string = toString(string);
+ options = assignInWith({}, options, settings, customDefaultsAssignIn);
+
+ var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
+ importsKeys = keys(imports),
+ importsValues = baseValues(imports, importsKeys);
+
+ var isEscaping,
+ isEvaluating,
+ index = 0,
+ interpolate = options.interpolate || reNoMatch,
+ source = "__p += '";
+
+ // Compile the regexp to match each delimiter.
+ var reDelimiters = RegExp(
+ (options.escape || reNoMatch).source + '|' +
+ interpolate.source + '|' +
+ (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
+ (options.evaluate || reNoMatch).source + '|$'
+ , 'g');
+
+ // Use a sourceURL for easier debugging.
+ // The sourceURL gets injected into the source that's eval-ed, so be careful
+ // with lookup (in case of e.g. prototype pollution), and strip newlines if any.
+ // A newline wouldn't be a valid sourceURL anyway, and it'd enable code injection.
+ var sourceURL = hasOwnProperty.call(options, 'sourceURL')
+ ? ('//# sourceURL=' +
+ (options.sourceURL + '').replace(/[\r\n]/g, ' ') +
+ '\n')
+ : '';
+
+ string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+ interpolateValue || (interpolateValue = esTemplateValue);
+
+ // Escape characters that can't be included in string literals.
+ source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
+
+ // Replace delimiters with snippets.
+ if (escapeValue) {
+ isEscaping = true;
+ source += "' +\n__e(" + escapeValue + ") +\n'";
+ }
+ if (evaluateValue) {
+ isEvaluating = true;
+ source += "';\n" + evaluateValue + ";\n__p += '";
+ }
+ if (interpolateValue) {
+ source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+ }
+ index = offset + match.length;
+
+ // The JS engine embedded in Adobe products needs `match` returned in
+ // order to produce the correct `offset` value.
+ return match;
+ });
+
+ source += "';\n";
+
+ // If `variable` is not specified wrap a with-statement around the generated
+ // code to add the data object to the top of the scope chain.
+ // Like with sourceURL, we take care to not check the option's prototype,
+ // as this configuration is a code injection vector.
+ var variable = hasOwnProperty.call(options, 'variable') && options.variable;
+ if (!variable) {
+ source = 'with (obj) {\n' + source + '\n}\n';
+ }
+ // Cleanup code by stripping empty strings.
+ source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
+ .replace(reEmptyStringMiddle, '$1')
+ .replace(reEmptyStringTrailing, '$1;');
+
+ // Frame code as the function body.
+ source = 'function(' + (variable || 'obj') + ') {\n' +
+ (variable
+ ? ''
+ : 'obj || (obj = {});\n'
+ ) +
+ "var __t, __p = ''" +
+ (isEscaping
+ ? ', __e = _.escape'
+ : ''
+ ) +
+ (isEvaluating
+ ? ', __j = Array.prototype.join;\n' +
+ "function print() { __p += __j.call(arguments, '') }\n"
+ : ';\n'
+ ) +
+ source +
+ 'return __p\n}';
+
+ var result = attempt(function() {
+ return Function(importsKeys, sourceURL + 'return ' + source)
+ .apply(undefined, importsValues);
+ });
+
+ // Provide the compiled function's source by its `toString` method or
+ // the `source` property as a convenience for inlining compiled templates.
+ result.source = source;
+ if (isError(result)) {
+ throw result;
+ }
+ return result;
+}
+
+module.exports = template;