source: trip-planner-front/node_modules/@angular/compiler/src/i18n/i18n_parser.js

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define("@angular/compiler/src/i18n/i18n_parser", ["require", "exports", "tslib", "@angular/compiler/src/expression_parser/lexer", "@angular/compiler/src/expression_parser/parser", "@angular/compiler/src/ml_parser/ast", "@angular/compiler/src/ml_parser/html_tags", "@angular/compiler/src/parse_util", "@angular/compiler/src/i18n/i18n_ast", "@angular/compiler/src/i18n/serializers/placeholder"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.createI18nMessageFactory = void 0;
    var tslib_1 = require("tslib");
    var lexer_1 = require("@angular/compiler/src/expression_parser/lexer");
    var parser_1 = require("@angular/compiler/src/expression_parser/parser");
    var html = require("@angular/compiler/src/ml_parser/ast");
    var html_tags_1 = require("@angular/compiler/src/ml_parser/html_tags");
    var parse_util_1 = require("@angular/compiler/src/parse_util");
    var i18n = require("@angular/compiler/src/i18n/i18n_ast");
    var placeholder_1 = require("@angular/compiler/src/i18n/serializers/placeholder");
    var _expParser = new parser_1.Parser(new lexer_1.Lexer());
    /**
     * Returns a function converting html nodes to an i18n Message given an interpolationConfig
     */
    function createI18nMessageFactory(interpolationConfig) {
        var visitor = new _I18nVisitor(_expParser, interpolationConfig);
        return function (nodes, meaning, description, customId, visitNodeFn) {
            return visitor.toI18nMessage(nodes, meaning, description, customId, visitNodeFn);
        };
    }
    exports.createI18nMessageFactory = createI18nMessageFactory;
    function noopVisitNodeFn(_html, i18n) {
        return i18n;
    }
    var _I18nVisitor = /** @class */ (function () {
        function _I18nVisitor(_expressionParser, _interpolationConfig) {
            this._expressionParser = _expressionParser;
            this._interpolationConfig = _interpolationConfig;
        }
        _I18nVisitor.prototype.toI18nMessage = function (nodes, meaning, description, customId, visitNodeFn) {
            if (meaning === void 0) { meaning = ''; }
            if (description === void 0) { description = ''; }
            if (customId === void 0) { customId = ''; }
            var context = {
                isIcu: nodes.length == 1 && nodes[0] instanceof html.Expansion,
                icuDepth: 0,
                placeholderRegistry: new placeholder_1.PlaceholderRegistry(),
                placeholderToContent: {},
                placeholderToMessage: {},
                visitNodeFn: visitNodeFn || noopVisitNodeFn,
            };
            var i18nodes = html.visitAll(this, nodes, context);
            return new i18n.Message(i18nodes, context.placeholderToContent, context.placeholderToMessage, meaning, description, customId);
        };
        _I18nVisitor.prototype.visitElement = function (el, context) {
            var _a;
            var children = html.visitAll(this, el.children, context);
            var attrs = {};
            el.attrs.forEach(function (attr) {
                // Do not visit the attributes, translatable ones are top-level ASTs
                attrs[attr.name] = attr.value;
            });
            var isVoid = html_tags_1.getHtmlTagDefinition(el.name).isVoid;
            var startPhName = context.placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);
            context.placeholderToContent[startPhName] = {
                text: el.startSourceSpan.toString(),
                sourceSpan: el.startSourceSpan,
            };
            var closePhName = '';
            if (!isVoid) {
                closePhName = context.placeholderRegistry.getCloseTagPlaceholderName(el.name);
                context.placeholderToContent[closePhName] = {
                    text: "</" + el.name + ">",
                    sourceSpan: (_a = el.endSourceSpan) !== null && _a !== void 0 ? _a : el.sourceSpan,
                };
            }
            var node = new i18n.TagPlaceholder(el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan, el.startSourceSpan, el.endSourceSpan);
            return context.visitNodeFn(el, node);
        };
        _I18nVisitor.prototype.visitAttribute = function (attribute, context) {
            var node = attribute.valueTokens === undefined || attribute.valueTokens.length === 1 ?
                new i18n.Text(attribute.value, attribute.valueSpan || attribute.sourceSpan) :
                this._visitTextWithInterpolation(attribute.valueTokens, attribute.valueSpan || attribute.sourceSpan, context, attribute.i18n);
            return context.visitNodeFn(attribute, node);
        };
        _I18nVisitor.prototype.visitText = function (text, context) {
            var node = text.tokens.length === 1 ?
                new i18n.Text(text.value, text.sourceSpan) :
                this._visitTextWithInterpolation(text.tokens, text.sourceSpan, context, text.i18n);
            return context.visitNodeFn(text, node);
        };
        _I18nVisitor.prototype.visitComment = function (comment, context) {
            return null;
        };
        _I18nVisitor.prototype.visitExpansion = function (icu, context) {
            var _this = this;
            context.icuDepth++;
            var i18nIcuCases = {};
            var i18nIcu = new i18n.Icu(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);
            icu.cases.forEach(function (caze) {
                i18nIcuCases[caze.value] = new i18n.Container(caze.expression.map(function (node) { return node.visit(_this, context); }), caze.expSourceSpan);
            });
            context.icuDepth--;
            if (context.isIcu || context.icuDepth > 0) {
                // Returns an ICU node when:
                // - the message (vs a part of the message) is an ICU message, or
                // - the ICU message is nested.
                var expPh = context.placeholderRegistry.getUniquePlaceholder("VAR_" + icu.type);
                i18nIcu.expressionPlaceholder = expPh;
                context.placeholderToContent[expPh] = {
                    text: icu.switchValue,
                    sourceSpan: icu.switchValueSourceSpan,
                };
                return context.visitNodeFn(icu, i18nIcu);
            }
            // Else returns a placeholder
            // ICU placeholders should not be replaced with their original content but with the their
            // translations.
            // TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg
            var phName = context.placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());
            context.placeholderToMessage[phName] = this.toI18nMessage([icu], '', '', '', undefined);
            var node = new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);
            return context.visitNodeFn(icu, node);
        };
        _I18nVisitor.prototype.visitExpansionCase = function (_icuCase, _context) {
            throw new Error('Unreachable code');
        };
        /**
         * Convert, text and interpolated tokens up into text and placeholder pieces.
         *
         * @param tokens The text and interpolated tokens.
         * @param sourceSpan The span of the whole of the `text` string.
         * @param context The current context of the visitor, used to compute and store placeholders.
         * @param previousI18n Any i18n metadata associated with this `text` from a previous pass.
         */
        _I18nVisitor.prototype._visitTextWithInterpolation = function (tokens, sourceSpan, context, previousI18n) {
            var e_1, _a;
            // Return a sequence of `Text` and `Placeholder` nodes grouped in a `Container`.
            var nodes = [];
            // We will only create a container if there are actually interpolations,
            // so this flag tracks that.
            var hasInterpolation = false;
            try {
                for (var tokens_1 = tslib_1.__values(tokens), tokens_1_1 = tokens_1.next(); !tokens_1_1.done; tokens_1_1 = tokens_1.next()) {
                    var token = tokens_1_1.value;
                    switch (token.type) {
                        case 8 /* INTERPOLATION */:
                        case 17 /* ATTR_VALUE_INTERPOLATION */:
                            hasInterpolation = true;
                            var expression = token.parts[1];
                            var baseName = extractPlaceholderName(expression) || 'INTERPOLATION';
                            var phName = context.placeholderRegistry.getPlaceholderName(baseName, expression);
                            context.placeholderToContent[phName] = {
                                text: token.parts.join(''),
                                sourceSpan: token.sourceSpan
                            };
                            nodes.push(new i18n.Placeholder(expression, phName, token.sourceSpan));
                            break;
                        default:
                            if (token.parts[0].length > 0) {
                                // This token is text or an encoded entity.
                                // If it is following on from a previous text node then merge it into that node
                                // Otherwise, if it is following an interpolation, then add a new node.
                                var previous = nodes[nodes.length - 1];
                                if (previous instanceof i18n.Text) {
                                    previous.value += token.parts[0];
                                    previous.sourceSpan = new parse_util_1.ParseSourceSpan(previous.sourceSpan.start, token.sourceSpan.end, previous.sourceSpan.fullStart, previous.sourceSpan.details);
                                }
                                else {
                                    nodes.push(new i18n.Text(token.parts[0], token.sourceSpan));
                                }
                            }
                            break;
                    }
                }
            }
            catch (e_1_1) { e_1 = { error: e_1_1 }; }
            finally {
                try {
                    if (tokens_1_1 && !tokens_1_1.done && (_a = tokens_1.return)) _a.call(tokens_1);
                }
                finally { if (e_1) throw e_1.error; }
            }
            if (hasInterpolation) {
                // Whitespace removal may have invalidated the interpolation source-spans.
                reusePreviousSourceSpans(nodes, previousI18n);
                return new i18n.Container(nodes, sourceSpan);
            }
            else {
                return nodes[0];
            }
        };
        return _I18nVisitor;
    }());
    /**
     * Re-use the source-spans from `previousI18n` metadata for the `nodes`.
     *
     * Whitespace removal can invalidate the source-spans of interpolation nodes, so we
     * reuse the source-span stored from a previous pass before the whitespace was removed.
     *
     * @param nodes The `Text` and `Placeholder` nodes to be processed.
     * @param previousI18n Any i18n metadata for these `nodes` stored from a previous pass.
     */
    function reusePreviousSourceSpans(nodes, previousI18n) {
        if (previousI18n instanceof i18n.Message) {
            // The `previousI18n` is an i18n `Message`, so we are processing an `Attribute` with i18n
            // metadata. The `Message` should consist only of a single `Container` that contains the
            // parts (`Text` and `Placeholder`) to process.
            assertSingleContainerMessage(previousI18n);
            previousI18n = previousI18n.nodes[0];
        }
        if (previousI18n instanceof i18n.Container) {
            // The `previousI18n` is a `Container`, which means that this is a second i18n extraction pass
            // after whitespace has been removed from the AST nodes.
            assertEquivalentNodes(previousI18n.children, nodes);
            // Reuse the source-spans from the first pass.
            for (var i = 0; i < nodes.length; i++) {
                nodes[i].sourceSpan = previousI18n.children[i].sourceSpan;
            }
        }
    }
    /**
     * Asserts that the `message` contains exactly one `Container` node.
     */
    function assertSingleContainerMessage(message) {
        var nodes = message.nodes;
        if (nodes.length !== 1 || !(nodes[0] instanceof i18n.Container)) {
            throw new Error('Unexpected previous i18n message - expected it to consist of only a single `Container` node.');
        }
    }
    /**
     * Asserts that the `previousNodes` and `node` collections have the same number of elements and
     * corresponding elements have the same node type.
     */
    function assertEquivalentNodes(previousNodes, nodes) {
        if (previousNodes.length !== nodes.length) {
            throw new Error('The number of i18n message children changed between first and second pass.');
        }
        if (previousNodes.some(function (node, i) { return nodes[i].constructor !== node.constructor; })) {
            throw new Error('The types of the i18n message children changed between first and second pass.');
        }
    }
    var _CUSTOM_PH_EXP = /\/\/[\s\S]*i18n[\s\S]*\([\s\S]*ph[\s\S]*=[\s\S]*("|')([\s\S]*?)\1[\s\S]*\)/g;
    function extractPlaceholderName(input) {
        return input.split(_CUSTOM_PH_EXP)[2];
    }
});
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Lexer as ExpressionLexer} from '../expression_parser/lexer';\nimport {Parser as ExpressionParser} from '../expression_parser/parser';\nimport * as html from '../ml_parser/ast';\nimport {getHtmlTagDefinition} from '../ml_parser/html_tags';\nimport {InterpolationConfig} from '../ml_parser/interpolation_config';\nimport {InterpolatedAttributeToken, InterpolatedTextToken, TokenType} from '../ml_parser/tokens';\nimport {ParseSourceSpan} from '../parse_util';\n\nimport * as i18n from './i18n_ast';\nimport {PlaceholderRegistry} from './serializers/placeholder';\n\nconst _expParser = new ExpressionParser(new ExpressionLexer());\n\nexport type VisitNodeFn = (html: html.Node, i18n: i18n.Node) => i18n.Node;\n\nexport interface I18nMessageFactory {\n  (nodes: html.Node[], meaning: string|undefined, description: string|undefined,\n   customId: string|undefined, visitNodeFn?: VisitNodeFn): i18n.Message;\n}\n\n/**\n * Returns a function converting html nodes to an i18n Message given an interpolationConfig\n */\nexport function createI18nMessageFactory(interpolationConfig: InterpolationConfig):\n    I18nMessageFactory {\n  const visitor = new _I18nVisitor(_expParser, interpolationConfig);\n  return (nodes, meaning, description, customId, visitNodeFn) =>\n             visitor.toI18nMessage(nodes, meaning, description, customId, visitNodeFn);\n}\n\ninterface I18nMessageVisitorContext {\n  isIcu: boolean;\n  icuDepth: number;\n  placeholderRegistry: PlaceholderRegistry;\n  placeholderToContent: {[phName: string]: i18n.MessagePlaceholder};\n  placeholderToMessage: {[phName: string]: i18n.Message};\n  visitNodeFn: VisitNodeFn;\n}\n\nfunction noopVisitNodeFn(_html: html.Node, i18n: i18n.Node): i18n.Node {\n  return i18n;\n}\n\nclass _I18nVisitor implements html.Visitor {\n  constructor(\n      private _expressionParser: ExpressionParser,\n      private _interpolationConfig: InterpolationConfig) {}\n\n  public toI18nMessage(\n      nodes: html.Node[], meaning = '', description = '', customId = '',\n      visitNodeFn: VisitNodeFn|undefined): i18n.Message {\n    const context: I18nMessageVisitorContext = {\n      isIcu: nodes.length == 1 && nodes[0] instanceof html.Expansion,\n      icuDepth: 0,\n      placeholderRegistry: new PlaceholderRegistry(),\n      placeholderToContent: {},\n      placeholderToMessage: {},\n      visitNodeFn: visitNodeFn || noopVisitNodeFn,\n    };\n\n    const i18nodes: i18n.Node[] = html.visitAll(this, nodes, context);\n\n    return new i18n.Message(\n        i18nodes, context.placeholderToContent, context.placeholderToMessage, meaning, description,\n        customId);\n  }\n\n  visitElement(el: html.Element, context: I18nMessageVisitorContext): i18n.Node {\n    const children = html.visitAll(this, el.children, context);\n    const attrs: {[k: string]: string} = {};\n    el.attrs.forEach(attr => {\n      // Do not visit the attributes, translatable ones are top-level ASTs\n      attrs[attr.name] = attr.value;\n    });\n\n    const isVoid: boolean = getHtmlTagDefinition(el.name).isVoid;\n    const startPhName =\n        context.placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);\n    context.placeholderToContent[startPhName] = {\n      text: el.startSourceSpan.toString(),\n      sourceSpan: el.startSourceSpan,\n    };\n\n    let closePhName = '';\n\n    if (!isVoid) {\n      closePhName = context.placeholderRegistry.getCloseTagPlaceholderName(el.name);\n      context.placeholderToContent[closePhName] = {\n        text: `</${el.name}>`,\n        sourceSpan: el.endSourceSpan ?? el.sourceSpan,\n      };\n    }\n\n    const node = new i18n.TagPlaceholder(\n        el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan,\n        el.startSourceSpan, el.endSourceSpan);\n    return context.visitNodeFn(el, node);\n  }\n\n  visitAttribute(attribute: html.Attribute, context: I18nMessageVisitorContext): i18n.Node {\n    const node = attribute.valueTokens === undefined || attribute.valueTokens.length === 1 ?\n        new i18n.Text(attribute.value, attribute.valueSpan || attribute.sourceSpan) :\n        this._visitTextWithInterpolation(\n            attribute.valueTokens, attribute.valueSpan || attribute.sourceSpan, context,\n            attribute.i18n);\n    return context.visitNodeFn(attribute, node);\n  }\n\n  visitText(text: html.Text, context: I18nMessageVisitorContext): i18n.Node {\n    const node = text.tokens.length === 1 ?\n        new i18n.Text(text.value, text.sourceSpan) :\n        this._visitTextWithInterpolation(text.tokens, text.sourceSpan, context, text.i18n);\n    return context.visitNodeFn(text, node);\n  }\n\n  visitComment(comment: html.Comment, context: I18nMessageVisitorContext): i18n.Node|null {\n    return null;\n  }\n\n  visitExpansion(icu: html.Expansion, context: I18nMessageVisitorContext): i18n.Node {\n    context.icuDepth++;\n    const i18nIcuCases: {[k: string]: i18n.Node} = {};\n    const i18nIcu = new i18n.Icu(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);\n    icu.cases.forEach((caze): void => {\n      i18nIcuCases[caze.value] = new i18n.Container(\n          caze.expression.map((node) => node.visit(this, context)), caze.expSourceSpan);\n    });\n    context.icuDepth--;\n\n    if (context.isIcu || context.icuDepth > 0) {\n      // Returns an ICU node when:\n      // - the message (vs a part of the message) is an ICU message, or\n      // - the ICU message is nested.\n      const expPh = context.placeholderRegistry.getUniquePlaceholder(`VAR_${icu.type}`);\n      i18nIcu.expressionPlaceholder = expPh;\n      context.placeholderToContent[expPh] = {\n        text: icu.switchValue,\n        sourceSpan: icu.switchValueSourceSpan,\n      };\n      return context.visitNodeFn(icu, i18nIcu);\n    }\n\n    // Else returns a placeholder\n    // ICU placeholders should not be replaced with their original content but with the their\n    // translations.\n    // TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg\n    const phName = context.placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());\n    context.placeholderToMessage[phName] = this.toI18nMessage([icu], '', '', '', undefined);\n    const node = new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);\n    return context.visitNodeFn(icu, node);\n  }\n\n  visitExpansionCase(_icuCase: html.ExpansionCase, _context: I18nMessageVisitorContext): i18n.Node {\n    throw new Error('Unreachable code');\n  }\n\n  /**\n   * Convert, text and interpolated tokens up into text and placeholder pieces.\n   *\n   * @param tokens The text and interpolated tokens.\n   * @param sourceSpan The span of the whole of the `text` string.\n   * @param context The current context of the visitor, used to compute and store placeholders.\n   * @param previousI18n Any i18n metadata associated with this `text` from a previous pass.\n   */\n  private _visitTextWithInterpolation(\n      tokens: (InterpolatedTextToken|InterpolatedAttributeToken)[], sourceSpan: ParseSourceSpan,\n      context: I18nMessageVisitorContext, previousI18n: i18n.I18nMeta|undefined): i18n.Node {\n    // Return a sequence of `Text` and `Placeholder` nodes grouped in a `Container`.\n    const nodes: i18n.Node[] = [];\n    // We will only create a container if there are actually interpolations,\n    // so this flag tracks that.\n    let hasInterpolation = false;\n    for (const token of tokens) {\n      switch (token.type) {\n        case TokenType.INTERPOLATION:\n        case TokenType.ATTR_VALUE_INTERPOLATION:\n          hasInterpolation = true;\n          const expression = token.parts[1];\n          const baseName = extractPlaceholderName(expression) || 'INTERPOLATION';\n          const phName = context.placeholderRegistry.getPlaceholderName(baseName, expression);\n          context.placeholderToContent[phName] = {\n            text: token.parts.join(''),\n            sourceSpan: token.sourceSpan\n          };\n          nodes.push(new i18n.Placeholder(expression, phName, token.sourceSpan));\n          break;\n        default:\n          if (token.parts[0].length > 0) {\n            // This token is text or an encoded entity.\n            // If it is following on from a previous text node then merge it into that node\n            // Otherwise, if it is following an interpolation, then add a new node.\n            const previous = nodes[nodes.length - 1];\n            if (previous instanceof i18n.Text) {\n              previous.value += token.parts[0];\n              previous.sourceSpan = new ParseSourceSpan(\n                  previous.sourceSpan.start, token.sourceSpan.end, previous.sourceSpan.fullStart,\n                  previous.sourceSpan.details);\n            } else {\n              nodes.push(new i18n.Text(token.parts[0], token.sourceSpan));\n            }\n          }\n          break;\n      }\n    }\n\n    if (hasInterpolation) {\n      // Whitespace removal may have invalidated the interpolation source-spans.\n      reusePreviousSourceSpans(nodes, previousI18n);\n      return new i18n.Container(nodes, sourceSpan);\n    } else {\n      return nodes[0];\n    }\n  }\n}\n\n/**\n * Re-use the source-spans from `previousI18n` metadata for the `nodes`.\n *\n * Whitespace removal can invalidate the source-spans of interpolation nodes, so we\n * reuse the source-span stored from a previous pass before the whitespace was removed.\n *\n * @param nodes The `Text` and `Placeholder` nodes to be processed.\n * @param previousI18n Any i18n metadata for these `nodes` stored from a previous pass.\n */\nfunction reusePreviousSourceSpans(nodes: i18n.Node[], previousI18n: i18n.I18nMeta|undefined): void {\n  if (previousI18n instanceof i18n.Message) {\n    // The `previousI18n` is an i18n `Message`, so we are processing an `Attribute` with i18n\n    // metadata. The `Message` should consist only of a single `Container` that contains the\n    // parts (`Text` and `Placeholder`) to process.\n    assertSingleContainerMessage(previousI18n);\n    previousI18n = previousI18n.nodes[0];\n  }\n\n  if (previousI18n instanceof i18n.Container) {\n    // The `previousI18n` is a `Container`, which means that this is a second i18n extraction pass\n    // after whitespace has been removed from the AST nodes.\n    assertEquivalentNodes(previousI18n.children, nodes);\n\n    // Reuse the source-spans from the first pass.\n    for (let i = 0; i < nodes.length; i++) {\n      nodes[i].sourceSpan = previousI18n.children[i].sourceSpan;\n    }\n  }\n}\n\n/**\n * Asserts that the `message` contains exactly one `Container` node.\n */\nfunction assertSingleContainerMessage(message: i18n.Message): void {\n  const nodes = message.nodes;\n  if (nodes.length !== 1 || !(nodes[0] instanceof i18n.Container)) {\n    throw new Error(\n        'Unexpected previous i18n message - expected it to consist of only a single `Container` node.');\n  }\n}\n\n/**\n * Asserts that the `previousNodes` and `node` collections have the same number of elements and\n * corresponding elements have the same node type.\n */\nfunction assertEquivalentNodes(previousNodes: i18n.Node[], nodes: i18n.Node[]): void {\n  if (previousNodes.length !== nodes.length) {\n    throw new Error('The number of i18n message children changed between first and second pass.');\n  }\n  if (previousNodes.some((node, i) => nodes[i].constructor !== node.constructor)) {\n    throw new Error(\n        'The types of the i18n message children changed between first and second pass.');\n  }\n}\n\nconst _CUSTOM_PH_EXP =\n    /\\/\\/[\\s\\S]*i18n[\\s\\S]*\\([\\s\\S]*ph[\\s\\S]*=[\\s\\S]*(\"|')([\\s\\S]*?)\\1[\\s\\S]*\\)/g;\n\nfunction extractPlaceholderName(input: string): string {\n  return input.split(_CUSTOM_PH_EXP)[2];\n}\n"]}