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* as utils from './utils';\n\nconst anonymousFunc = /(<anonymous>|Function):(\\d+):(\\d+)/;\n\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e              - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function(e, fileContentMap, currentFilename) {\n    Error.call(this);\n\n    const filename = e.filename || currentFilename;\n\n    this.message = e.message;\n    this.stack = e.stack;\n\n    if (fileContentMap && filename) {\n        const input = fileContentMap.contents[filename];\n        const loc = utils.getLocation(e.index, input);\n        var line = loc.line;\n        const col  = loc.column;\n        const callLine = e.call && utils.getLocation(e.call, input).line;\n        const lines = input ? input.split('\\n') : '';\n\n        this.type = e.type || 'Syntax';\n        this.filename = filename;\n        this.index = e.index;\n        this.line = typeof line === 'number' ? line + 1 : null;\n        this.column = col;\n\n        if (!this.line && this.stack) {\n            const found = this.stack.match(anonymousFunc);\n\n            /**\n             * We have to figure out how this environment stringifies anonymous functions\n             * so we can correctly map plugin errors.\n             * \n             * Note, in Node 8, the output of anonymous funcs varied based on parameters\n             * being present or not, so we inject dummy params.\n             */\n            const func = new Function('a', 'throw new Error()');\n            let lineAdjust = 0;\n            try {\n                func();\n            } catch (e) {\n                const match = e.stack.match(anonymousFunc);\n                var line = parseInt(match[2]);\n                lineAdjust = 1 - line;\n            }\n\n            if (found) {\n                if (found[2]) {\n                    this.line = parseInt(found[2]) + lineAdjust;\n                }\n                if (found[3]) {\n                    this.column = parseInt(found[3]);\n                }\n            }\n        }\n\n        this.callLine = callLine + 1;\n        this.callExtract = lines[callLine];\n\n        this.extract = [\n            lines[this.line - 2],\n            lines[this.line - 1],\n            lines[this.line]\n        ];\n    }\n\n};\n\nif (typeof Object.create === 'undefined') {\n    const F = function () {};\n    F.prototype = Error.prototype;\n    LessError.prototype = new F();\n} else {\n    LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options) {\n    options = options || {};\n\n    let message = '';\n    const extract = this.extract || [];\n    let error = [];\n    let stylize = function (str) { return str; };\n    if (options.stylize) {\n        const type = typeof options.stylize;\n        if (type !== 'function') {\n            throw Error(`options.stylize should be a function, got a ${type}!`);\n        }\n        stylize = options.stylize;\n    }\n\n    if (this.line !== null) {\n        if (typeof extract[0] === 'string') {\n            error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n        }\n\n        if (typeof extract[1] === 'string') {\n            let errorTxt = `${this.line} `;\n            if (extract[1]) {\n                errorTxt += extract[1].slice(0, this.column) +\n                    stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n                        extract[1].slice(this.column + 1), 'red'), 'inverse');\n            }\n            error.push(errorTxt);\n        }\n\n        if (typeof extract[2] === 'string') {\n            error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n        }\n        error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n    }\n\n    message += stylize(`${this.type}Error: ${this.message}`, 'red');\n    if (this.filename) {\n        message += stylize(' in ', 'red') + this.filename;\n    }\n    if (this.line) {\n        message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n    }\n\n    message += `\\n${error}`;\n\n    if (this.callLine) {\n        message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n        message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n    }\n\n    return message;\n};\n\nexport default LessError;"]}