(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/output/output_interpreter", ["require", "exports", "tslib", "@angular/compiler/src/output/output_ast", "@angular/compiler/src/output/ts_emitter"], factory); } })(function (require, exports) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.interpretStatements = void 0; var tslib_1 = require("tslib"); var o = require("@angular/compiler/src/output/output_ast"); var ts_emitter_1 = require("@angular/compiler/src/output/ts_emitter"); function interpretStatements(statements, reflector) { var ctx = new _ExecutionContext(null, null, null, new Map()); var visitor = new StatementInterpreter(reflector); visitor.visitAllStatements(statements, ctx); var result = {}; ctx.exports.forEach(function (exportName) { result[exportName] = ctx.vars.get(exportName); }); return result; } exports.interpretStatements = interpretStatements; function _executeFunctionStatements(varNames, varValues, statements, ctx, visitor) { var childCtx = ctx.createChildWihtLocalVars(); for (var i = 0; i < varNames.length; i++) { childCtx.vars.set(varNames[i], varValues[i]); } var result = visitor.visitAllStatements(statements, childCtx); return result ? result.value : null; } var _ExecutionContext = /** @class */ (function () { function _ExecutionContext(parent, instance, className, vars) { this.parent = parent; this.instance = instance; this.className = className; this.vars = vars; this.exports = []; } _ExecutionContext.prototype.createChildWihtLocalVars = function () { return new _ExecutionContext(this, this.instance, this.className, new Map()); }; return _ExecutionContext; }()); var ReturnValue = /** @class */ (function () { function ReturnValue(value) { this.value = value; } return ReturnValue; }()); function createDynamicClass(_classStmt, _ctx, _visitor) { var propertyDescriptors = {}; _classStmt.getters.forEach(function (getter) { // Note: use `function` instead of arrow function to capture `this` propertyDescriptors[getter.name] = { configurable: false, get: function () { var instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars); return _executeFunctionStatements([], [], getter.body, instanceCtx, _visitor); } }; }); _classStmt.methods.forEach(function (method) { var paramNames = method.params.map(function (param) { return param.name; }); // Note: use `function` instead of arrow function to capture `this` propertyDescriptors[method.name] = { writable: false, configurable: false, value: function () { var args = []; for (var _i = 0; _i < arguments.length; _i++) { args[_i] = arguments[_i]; } var instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars); return _executeFunctionStatements(paramNames, args, method.body, instanceCtx, _visitor); } }; }); var ctorParamNames = _classStmt.constructorMethod.params.map(function (param) { return param.name; }); // Note: use `function` instead of arrow function to capture `this` var ctor = function () { var _this = this; var args = []; for (var _i = 0; _i < arguments.length; _i++) { args[_i] = arguments[_i]; } var instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars); _classStmt.fields.forEach(function (field) { _this[field.name] = undefined; }); _executeFunctionStatements(ctorParamNames, args, _classStmt.constructorMethod.body, instanceCtx, _visitor); }; var superClass = _classStmt.parent ? _classStmt.parent.visitExpression(_visitor, _ctx) : Object; ctor.prototype = Object.create(superClass.prototype, propertyDescriptors); return ctor; } var StatementInterpreter = /** @class */ (function () { function StatementInterpreter(reflector) { this.reflector = reflector; } StatementInterpreter.prototype.debugAst = function (ast) { return ts_emitter_1.debugOutputAstAsTypeScript(ast); }; StatementInterpreter.prototype.visitDeclareVarStmt = function (stmt, ctx) { var initialValue = stmt.value ? stmt.value.visitExpression(this, ctx) : undefined; ctx.vars.set(stmt.name, initialValue); if (stmt.hasModifier(o.StmtModifier.Exported)) { ctx.exports.push(stmt.name); } return null; }; StatementInterpreter.prototype.visitWriteVarExpr = function (expr, ctx) { var value = expr.value.visitExpression(this, ctx); var currCtx = ctx; while (currCtx != null) { if (currCtx.vars.has(expr.name)) { currCtx.vars.set(expr.name, value); return value; } currCtx = currCtx.parent; } throw new Error("Not declared variable " + expr.name); }; StatementInterpreter.prototype.visitWrappedNodeExpr = function (ast, ctx) { throw new Error('Cannot interpret a WrappedNodeExpr.'); }; StatementInterpreter.prototype.visitTypeofExpr = function (ast, ctx) { throw new Error('Cannot interpret a TypeofExpr'); }; StatementInterpreter.prototype.visitReadVarExpr = function (ast, ctx) { var varName = ast.name; if (ast.builtin != null) { switch (ast.builtin) { case o.BuiltinVar.Super: return Object.getPrototypeOf(ctx.instance); case o.BuiltinVar.This: return ctx.instance; case o.BuiltinVar.CatchError: varName = CATCH_ERROR_VAR; break; case o.BuiltinVar.CatchStack: varName = CATCH_STACK_VAR; break; default: throw new Error("Unknown builtin variable " + ast.builtin); } } var currCtx = ctx; while (currCtx != null) { if (currCtx.vars.has(varName)) { return currCtx.vars.get(varName); } currCtx = currCtx.parent; } throw new Error("Not declared variable " + varName); }; StatementInterpreter.prototype.visitWriteKeyExpr = function (expr, ctx) { var receiver = expr.receiver.visitExpression(this, ctx); var index = expr.index.visitExpression(this, ctx); var value = expr.value.visitExpression(this, ctx); receiver[index] = value; return value; }; StatementInterpreter.prototype.visitWritePropExpr = function (expr, ctx) { var receiver = expr.receiver.visitExpression(this, ctx); var value = expr.value.visitExpression(this, ctx); receiver[expr.name] = value; return value; }; StatementInterpreter.prototype.visitInvokeMethodExpr = function (expr, ctx) { var receiver = expr.receiver.visitExpression(this, ctx); var args = this.visitAllExpressions(expr.args, ctx); var result; if (expr.builtin != null) { switch (expr.builtin) { case o.BuiltinMethod.ConcatArray: result = receiver.concat.apply(receiver, tslib_1.__spreadArray([], tslib_1.__read(args))); break; case o.BuiltinMethod.SubscribeObservable: result = receiver.subscribe({ next: args[0] }); break; case o.BuiltinMethod.Bind: result = receiver.bind.apply(receiver, tslib_1.__spreadArray([], tslib_1.__read(args))); break; default: throw new Error("Unknown builtin method " + expr.builtin); } } else { result = receiver[expr.name].apply(receiver, args); } return result; }; StatementInterpreter.prototype.visitInvokeFunctionExpr = function (stmt, ctx) { var args = this.visitAllExpressions(stmt.args, ctx); var fnExpr = stmt.fn; if (fnExpr instanceof o.ReadVarExpr && fnExpr.builtin === o.BuiltinVar.Super) { ctx.instance.constructor.prototype.constructor.apply(ctx.instance, args); return null; } else { var fn = stmt.fn.visitExpression(this, ctx); return fn.apply(null, args); } }; StatementInterpreter.prototype.visitTaggedTemplateExpr = function (expr, ctx) { var templateElements = expr.template.elements.map(function (e) { return e.text; }); Object.defineProperty(templateElements, 'raw', { value: expr.template.elements.map(function (e) { return e.rawText; }) }); var args = this.visitAllExpressions(expr.template.expressions, ctx); args.unshift(templateElements); var tag = expr.tag.visitExpression(this, ctx); return tag.apply(null, args); }; StatementInterpreter.prototype.visitReturnStmt = function (stmt, ctx) { return new ReturnValue(stmt.value.visitExpression(this, ctx)); }; StatementInterpreter.prototype.visitDeclareClassStmt = function (stmt, ctx) { var clazz = createDynamicClass(stmt, ctx, this); ctx.vars.set(stmt.name, clazz); if (stmt.hasModifier(o.StmtModifier.Exported)) { ctx.exports.push(stmt.name); } return null; }; StatementInterpreter.prototype.visitExpressionStmt = function (stmt, ctx) { return stmt.expr.visitExpression(this, ctx); }; StatementInterpreter.prototype.visitIfStmt = function (stmt, ctx) { var condition = stmt.condition.visitExpression(this, ctx); if (condition) { return this.visitAllStatements(stmt.trueCase, ctx); } else if (stmt.falseCase != null) { return this.visitAllStatements(stmt.falseCase, ctx); } return null; }; StatementInterpreter.prototype.visitTryCatchStmt = function (stmt, ctx) { try { return this.visitAllStatements(stmt.bodyStmts, ctx); } catch (e) { var childCtx = ctx.createChildWihtLocalVars(); childCtx.vars.set(CATCH_ERROR_VAR, e); childCtx.vars.set(CATCH_STACK_VAR, e.stack); return this.visitAllStatements(stmt.catchStmts, childCtx); } }; StatementInterpreter.prototype.visitThrowStmt = function (stmt, ctx) { throw stmt.error.visitExpression(this, ctx); }; StatementInterpreter.prototype.visitInstantiateExpr = function (ast, ctx) { var args = this.visitAllExpressions(ast.args, ctx); var clazz = ast.classExpr.visitExpression(this, ctx); return new (clazz.bind.apply(clazz, tslib_1.__spreadArray([void 0], tslib_1.__read(args))))(); }; StatementInterpreter.prototype.visitLiteralExpr = function (ast, ctx) { return ast.value; }; StatementInterpreter.prototype.visitLocalizedString = function (ast, context) { return null; }; StatementInterpreter.prototype.visitExternalExpr = function (ast, ctx) { return this.reflector.resolveExternalReference(ast.value); }; StatementInterpreter.prototype.visitConditionalExpr = function (ast, ctx) { if (ast.condition.visitExpression(this, ctx)) { return ast.trueCase.visitExpression(this, ctx); } else if (ast.falseCase != null) { return ast.falseCase.visitExpression(this, ctx); } return null; }; StatementInterpreter.prototype.visitNotExpr = function (ast, ctx) { return !ast.condition.visitExpression(this, ctx); }; StatementInterpreter.prototype.visitAssertNotNullExpr = function (ast, ctx) { return ast.condition.visitExpression(this, ctx); }; StatementInterpreter.prototype.visitCastExpr = function (ast, ctx) { return ast.value.visitExpression(this, ctx); }; StatementInterpreter.prototype.visitFunctionExpr = function (ast, ctx) { var paramNames = ast.params.map(function (param) { return param.name; }); return _declareFn(paramNames, ast.statements, ctx, this); }; StatementInterpreter.prototype.visitDeclareFunctionStmt = function (stmt, ctx) { var paramNames = stmt.params.map(function (param) { return param.name; }); ctx.vars.set(stmt.name, _declareFn(paramNames, stmt.statements, ctx, this)); if (stmt.hasModifier(o.StmtModifier.Exported)) { ctx.exports.push(stmt.name); } return null; }; StatementInterpreter.prototype.visitUnaryOperatorExpr = function (ast, ctx) { var _this = this; var rhs = function () { return ast.expr.visitExpression(_this, ctx); }; switch (ast.operator) { case o.UnaryOperator.Plus: return +rhs(); case o.UnaryOperator.Minus: return -rhs(); default: throw new Error("Unknown operator " + ast.operator); } }; StatementInterpreter.prototype.visitBinaryOperatorExpr = function (ast, ctx) { var _this = this; var _a; var lhs = function () { return ast.lhs.visitExpression(_this, ctx); }; var rhs = function () { return ast.rhs.visitExpression(_this, ctx); }; switch (ast.operator) { case o.BinaryOperator.Equals: return lhs() == rhs(); case o.BinaryOperator.Identical: return lhs() === rhs(); case o.BinaryOperator.NotEquals: return lhs() != rhs(); case o.BinaryOperator.NotIdentical: return lhs() !== rhs(); case o.BinaryOperator.And: return lhs() && rhs(); case o.BinaryOperator.Or: return lhs() || rhs(); case o.BinaryOperator.Plus: return lhs() + rhs(); case o.BinaryOperator.Minus: return lhs() - rhs(); case o.BinaryOperator.Divide: return lhs() / rhs(); case o.BinaryOperator.Multiply: return lhs() * rhs(); case o.BinaryOperator.Modulo: return lhs() % rhs(); case o.BinaryOperator.Lower: return lhs() < rhs(); case o.BinaryOperator.LowerEquals: return lhs() <= rhs(); case o.BinaryOperator.Bigger: return lhs() > rhs(); case o.BinaryOperator.BiggerEquals: return lhs() >= rhs(); case o.BinaryOperator.NullishCoalesce: return (_a = lhs()) !== null && _a !== void 0 ? _a : rhs(); default: throw new Error("Unknown operator " + ast.operator); } }; StatementInterpreter.prototype.visitReadPropExpr = function (ast, ctx) { var result; var receiver = ast.receiver.visitExpression(this, ctx); result = receiver[ast.name]; return result; }; StatementInterpreter.prototype.visitReadKeyExpr = function (ast, ctx) { var receiver = ast.receiver.visitExpression(this, ctx); var prop = ast.index.visitExpression(this, ctx); return receiver[prop]; }; StatementInterpreter.prototype.visitLiteralArrayExpr = function (ast, ctx) { return this.visitAllExpressions(ast.entries, ctx); }; StatementInterpreter.prototype.visitLiteralMapExpr = function (ast, ctx) { var _this = this; var result = {}; ast.entries.forEach(function (entry) { return result[entry.key] = entry.value.visitExpression(_this, ctx); }); return result; }; StatementInterpreter.prototype.visitCommaExpr = function (ast, context) { var values = this.visitAllExpressions(ast.parts, context); return values[values.length - 1]; }; StatementInterpreter.prototype.visitAllExpressions = function (expressions, ctx) { var _this = this; return expressions.map(function (expr) { return expr.visitExpression(_this, ctx); }); }; StatementInterpreter.prototype.visitAllStatements = function (statements, ctx) { for (var i = 0; i < statements.length; i++) { var stmt = statements[i]; var val = stmt.visitStatement(this, ctx); if (val instanceof ReturnValue) { return val; } } return null; }; return StatementInterpreter; }()); function _declareFn(varNames, statements, ctx, visitor) { return function () { var args = []; for (var _i 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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 */\nimport {CompileReflector} from '../compile_reflector';\nimport * as o from './output_ast';\nimport {debugOutputAstAsTypeScript} from './ts_emitter';\n\nexport function interpretStatements(\n    statements: o.Statement[], reflector: CompileReflector): {[key: string]: any} {\n  const ctx = new _ExecutionContext(null, null, null, new Map<string, any>());\n  const visitor = new StatementInterpreter(reflector);\n  visitor.visitAllStatements(statements, ctx);\n  const result: {[key: string]: any} = {};\n  ctx.exports.forEach((exportName) => {\n    result[exportName] = ctx.vars.get(exportName);\n  });\n  return result;\n}\n\nfunction _executeFunctionStatements(\n    varNames: string[], varValues: any[], statements: o.Statement[], ctx: _ExecutionContext,\n    visitor: StatementInterpreter): any {\n  const childCtx = ctx.createChildWihtLocalVars();\n  for (let i = 0; i < varNames.length; i++) {\n    childCtx.vars.set(varNames[i], varValues[i]);\n  }\n  const result = visitor.visitAllStatements(statements, childCtx);\n  return result ? result.value : null;\n}\n\nclass _ExecutionContext {\n  exports: string[] = [];\n\n  constructor(\n      public parent: _ExecutionContext|null, public instance: Object|null,\n      public className: string|null, public vars: Map<string, any>) {}\n\n  createChildWihtLocalVars(): _ExecutionContext {\n    return new _ExecutionContext(this, this.instance, this.className, new Map<string, any>());\n  }\n}\n\nclass ReturnValue {\n  constructor(public value: any) {}\n}\n\nfunction createDynamicClass(\n    _classStmt: o.ClassStmt, _ctx: _ExecutionContext, _visitor: StatementInterpreter): Function {\n  const propertyDescriptors: {[key: string]: any} = {};\n\n  _classStmt.getters.forEach((getter: o.ClassGetter) => {\n    // Note: use `function` instead of arrow function to capture `this`\n    propertyDescriptors[getter.name] = {\n      configurable: false,\n      get: function() {\n        const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n        return _executeFunctionStatements([], [], getter.body, instanceCtx, _visitor);\n      }\n    };\n  });\n  _classStmt.methods.forEach(function(method: o.ClassMethod) {\n    const paramNames = method.params.map(param => param.name);\n    // Note: use `function` instead of arrow function to capture `this`\n    propertyDescriptors[method.name!] = {\n      writable: false,\n      configurable: false,\n      value: function(...args: any[]) {\n        const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n        return _executeFunctionStatements(paramNames, args, method.body, instanceCtx, _visitor);\n      }\n    };\n  });\n\n  const ctorParamNames = _classStmt.constructorMethod.params.map(param => param.name);\n  // Note: use `function` instead of arrow function to capture `this`\n  const ctor = function(this: Object, ...args: any[]) {\n    const instanceCtx = new _ExecutionContext(_ctx, this, _classStmt.name, _ctx.vars);\n    _classStmt.fields.forEach((field) => {\n      (this as any)[field.name] = undefined;\n    });\n    _executeFunctionStatements(\n        ctorParamNames, args, _classStmt.constructorMethod.body, instanceCtx, _visitor);\n  };\n  const superClass = _classStmt.parent ? _classStmt.parent.visitExpression(_visitor, _ctx) : Object;\n  ctor.prototype = Object.create(superClass.prototype, propertyDescriptors);\n  return ctor;\n}\n\nclass StatementInterpreter implements o.StatementVisitor, o.ExpressionVisitor {\n  constructor(private reflector: CompileReflector) {}\n  debugAst(ast: o.Expression|o.Statement|o.Type): string {\n    return debugOutputAstAsTypeScript(ast);\n  }\n\n  visitDeclareVarStmt(stmt: o.DeclareVarStmt, ctx: _ExecutionContext): any {\n    const initialValue = stmt.value ? stmt.value.visitExpression(this, ctx) : undefined;\n    ctx.vars.set(stmt.name, initialValue);\n    if (stmt.hasModifier(o.StmtModifier.Exported)) {\n      ctx.exports.push(stmt.name);\n    }\n    return null;\n  }\n  visitWriteVarExpr(expr: o.WriteVarExpr, ctx: _ExecutionContext): any {\n    const value = expr.value.visitExpression(this, ctx);\n    let currCtx = ctx;\n    while (currCtx != null) {\n      if (currCtx.vars.has(expr.name)) {\n        currCtx.vars.set(expr.name, value);\n        return value;\n      }\n      currCtx = currCtx.parent!;\n    }\n    throw new Error(`Not declared variable ${expr.name}`);\n  }\n  visitWrappedNodeExpr(ast: o.WrappedNodeExpr<any>, ctx: _ExecutionContext): never {\n    throw new Error('Cannot interpret a WrappedNodeExpr.');\n  }\n  visitTypeofExpr(ast: o.TypeofExpr, ctx: _ExecutionContext): never {\n    throw new Error('Cannot interpret a TypeofExpr');\n  }\n  visitReadVarExpr(ast: o.ReadVarExpr, ctx: _ExecutionContext): any {\n    let varName = ast.name!;\n    if (ast.builtin != null) {\n      switch (ast.builtin) {\n        case o.BuiltinVar.Super:\n          return Object.getPrototypeOf(ctx.instance);\n        case o.BuiltinVar.This:\n          return ctx.instance;\n        case o.BuiltinVar.CatchError:\n          varName = CATCH_ERROR_VAR;\n          break;\n        case o.BuiltinVar.CatchStack:\n          varName = CATCH_STACK_VAR;\n          break;\n        default:\n          throw new Error(`Unknown builtin variable ${ast.builtin}`);\n      }\n    }\n    let currCtx = ctx;\n    while (currCtx != null) {\n      if (currCtx.vars.has(varName)) {\n        return currCtx.vars.get(varName);\n      }\n      currCtx = currCtx.parent!;\n    }\n    throw new Error(`Not declared variable ${varName}`);\n  }\n  visitWriteKeyExpr(expr: o.WriteKeyExpr, ctx: _ExecutionContext): any {\n    const receiver = expr.receiver.visitExpression(this, ctx);\n    const index = expr.index.visitExpression(this, ctx);\n    const value = expr.value.visitExpression(this, ctx);\n    receiver[index] = value;\n    return value;\n  }\n  visitWritePropExpr(expr: o.WritePropExpr, ctx: _ExecutionContext): any {\n    const receiver = expr.receiver.visitExpression(this, ctx);\n    const value = expr.value.visitExpression(this, ctx);\n    receiver[expr.name] = value;\n    return value;\n  }\n\n  visitInvokeMethodExpr(expr: o.InvokeMethodExpr, ctx: _ExecutionContext): any {\n    const receiver = expr.receiver.visitExpression(this, ctx);\n    const args = this.visitAllExpressions(expr.args, ctx);\n    let result: any;\n    if (expr.builtin != null) {\n      switch (expr.builtin) {\n        case o.BuiltinMethod.ConcatArray:\n          result = receiver.concat(...args);\n          break;\n        case o.BuiltinMethod.SubscribeObservable:\n          result = receiver.subscribe({next: args[0]});\n          break;\n        case o.BuiltinMethod.Bind:\n          result = receiver.bind(...args);\n          break;\n        default:\n          throw new Error(`Unknown builtin method ${expr.builtin}`);\n      }\n    } else {\n      result = receiver[expr.name!].apply(receiver, args);\n    }\n    return result;\n  }\n  visitInvokeFunctionExpr(stmt: o.InvokeFunctionExpr, ctx: _ExecutionContext): any {\n    const args = this.visitAllExpressions(stmt.args, ctx);\n    const fnExpr = stmt.fn;\n    if (fnExpr instanceof o.ReadVarExpr && fnExpr.builtin === o.BuiltinVar.Super) {\n      ctx.instance!.constructor.prototype.constructor.apply(ctx.instance, args);\n      return null;\n    } else {\n      const fn = stmt.fn.visitExpression(this, ctx);\n      return fn.apply(null, args);\n    }\n  }\n  visitTaggedTemplateExpr(expr: o.TaggedTemplateExpr, ctx: _ExecutionContext): any {\n    const templateElements = expr.template.elements.map((e) => e.text);\n    Object.defineProperty(\n        templateElements, 'raw', {value: expr.template.elements.map((e) => e.rawText)});\n    const args = this.visitAllExpressions(expr.template.expressions, ctx);\n    args.unshift(templateElements);\n    const tag = expr.tag.visitExpression(this, ctx);\n    return tag.apply(null, args);\n  }\n  visitReturnStmt(stmt: o.ReturnStatement, ctx: _ExecutionContext): any {\n    return new ReturnValue(stmt.value.visitExpression(this, ctx));\n  }\n  visitDeclareClassStmt(stmt: o.ClassStmt, ctx: _ExecutionContext): any {\n    const clazz = createDynamicClass(stmt, ctx, this);\n    ctx.vars.set(stmt.name, clazz);\n    if (stmt.hasModifier(o.StmtModifier.Exported)) {\n      ctx.exports.push(stmt.name);\n    }\n    return null;\n  }\n  visitExpressionStmt(stmt: o.ExpressionStatement, ctx: _ExecutionContext): any {\n    return stmt.expr.visitExpression(this, ctx);\n  }\n  visitIfStmt(stmt: o.IfStmt, ctx: _ExecutionContext): any {\n    const condition = stmt.condition.visitExpression(this, ctx);\n    if (condition) {\n      return this.visitAllStatements(stmt.trueCase, ctx);\n    } else if (stmt.falseCase != null) {\n      return this.visitAllStatements(stmt.falseCase, ctx);\n    }\n    return null;\n  }\n  visitTryCatchStmt(stmt: o.TryCatchStmt, ctx: _ExecutionContext): any {\n    try {\n      return this.visitAllStatements(stmt.bodyStmts, ctx);\n    } catch (e) {\n      const childCtx = ctx.createChildWihtLocalVars();\n      childCtx.vars.set(CATCH_ERROR_VAR, e);\n      childCtx.vars.set(CATCH_STACK_VAR, e.stack);\n      return this.visitAllStatements(stmt.catchStmts, childCtx);\n    }\n  }\n  visitThrowStmt(stmt: o.ThrowStmt, ctx: _ExecutionContext): any {\n    throw stmt.error.visitExpression(this, ctx);\n  }\n  visitInstantiateExpr(ast: o.InstantiateExpr, ctx: _ExecutionContext): any {\n    const args = this.visitAllExpressions(ast.args, ctx);\n    const clazz = ast.classExpr.visitExpression(this, ctx);\n    return new clazz(...args);\n  }\n  visitLiteralExpr(ast: o.LiteralExpr, ctx: _ExecutionContext): any {\n    return ast.value;\n  }\n  visitLocalizedString(ast: o.LocalizedString, context: any): any {\n    return null;\n  }\n  visitExternalExpr(ast: o.ExternalExpr, ctx: _ExecutionContext): any {\n    return this.reflector.resolveExternalReference(ast.value);\n  }\n  visitConditionalExpr(ast: o.ConditionalExpr, ctx: _ExecutionContext): any {\n    if (ast.condition.visitExpression(this, ctx)) {\n      return ast.trueCase.visitExpression(this, ctx);\n    } else if (ast.falseCase != null) {\n      return ast.falseCase.visitExpression(this, ctx);\n    }\n    return null;\n  }\n  visitNotExpr(ast: o.NotExpr, ctx: _ExecutionContext): any {\n    return !ast.condition.visitExpression(this, ctx);\n  }\n  visitAssertNotNullExpr(ast: o.AssertNotNull, ctx: _ExecutionContext): any {\n    return ast.condition.visitExpression(this, ctx);\n  }\n  visitCastExpr(ast: o.CastExpr, ctx: _ExecutionContext): any {\n    return ast.value.visitExpression(this, ctx);\n  }\n  visitFunctionExpr(ast: o.FunctionExpr, ctx: _ExecutionContext): any {\n    const paramNames = ast.params.map((param) => param.name);\n    return _declareFn(paramNames, ast.statements, ctx, this);\n  }\n  visitDeclareFunctionStmt(stmt: o.DeclareFunctionStmt, ctx: _ExecutionContext): any {\n    const paramNames = stmt.params.map((param) => param.name);\n    ctx.vars.set(stmt.name, _declareFn(paramNames, stmt.statements, ctx, this));\n    if (stmt.hasModifier(o.StmtModifier.Exported)) {\n      ctx.exports.push(stmt.name);\n    }\n    return null;\n  }\n  visitUnaryOperatorExpr(ast: o.UnaryOperatorExpr, ctx: _ExecutionContext): any {\n    const rhs = () => ast.expr.visitExpression(this, ctx);\n\n    switch (ast.operator) {\n      case o.UnaryOperator.Plus:\n        return +rhs();\n      case o.UnaryOperator.Minus:\n        return -rhs();\n      default:\n        throw new Error(`Unknown operator ${ast.operator}`);\n    }\n  }\n  visitBinaryOperatorExpr(ast: o.BinaryOperatorExpr, ctx: _ExecutionContext): any {\n    const lhs = () => ast.lhs.visitExpression(this, ctx);\n    const rhs = () => ast.rhs.visitExpression(this, ctx);\n\n    switch (ast.operator) {\n      case o.BinaryOperator.Equals:\n        return lhs() == rhs();\n      case o.BinaryOperator.Identical:\n        return lhs() === rhs();\n      case o.BinaryOperator.NotEquals:\n        return lhs() != rhs();\n      case o.BinaryOperator.NotIdentical:\n        return lhs() !== rhs();\n      case o.BinaryOperator.And:\n        return lhs() && rhs();\n      case o.BinaryOperator.Or:\n        return lhs() || rhs();\n      case o.BinaryOperator.Plus:\n        return lhs() + rhs();\n      case o.BinaryOperator.Minus:\n        return lhs() - rhs();\n      case o.BinaryOperator.Divide:\n        return lhs() / rhs();\n      case o.BinaryOperator.Multiply:\n        return lhs() * rhs();\n      case o.BinaryOperator.Modulo:\n        return lhs() % rhs();\n      case o.BinaryOperator.Lower:\n        return lhs() < rhs();\n      case o.BinaryOperator.LowerEquals:\n        return lhs() <= rhs();\n      case o.BinaryOperator.Bigger:\n        return lhs() > rhs();\n      case o.BinaryOperator.BiggerEquals:\n        return lhs() >= rhs();\n      case o.BinaryOperator.NullishCoalesce:\n        return lhs() ?? rhs();\n      default:\n        throw new Error(`Unknown operator ${ast.operator}`);\n    }\n  }\n  visitReadPropExpr(ast: o.ReadPropExpr, ctx: _ExecutionContext): any {\n    let result: any;\n    const receiver = ast.receiver.visitExpression(this, ctx);\n    result = receiver[ast.name];\n    return result;\n  }\n  visitReadKeyExpr(ast: o.ReadKeyExpr, ctx: _ExecutionContext): any {\n    const receiver = ast.receiver.visitExpression(this, ctx);\n    const prop = ast.index.visitExpression(this, ctx);\n    return receiver[prop];\n  }\n  visitLiteralArrayExpr(ast: o.LiteralArrayExpr, ctx: _ExecutionContext): any {\n    return this.visitAllExpressions(ast.entries, ctx);\n  }\n  visitLiteralMapExpr(ast: o.LiteralMapExpr, ctx: _ExecutionContext): any {\n    const result: {[k: string]: any} = {};\n    ast.entries.forEach(entry => result[entry.key] = entry.value.visitExpression(this, ctx));\n    return result;\n  }\n  visitCommaExpr(ast: o.CommaExpr, context: any): any {\n    const values = this.visitAllExpressions(ast.parts, context);\n    return values[values.length - 1];\n  }\n  visitAllExpressions(expressions: o.Expression[], ctx: _ExecutionContext): any {\n    return expressions.map((expr) => expr.visitExpression(this, ctx));\n  }\n\n  visitAllStatements(statements: o.Statement[], ctx: _ExecutionContext): ReturnValue|null {\n    for (let i = 0; i < statements.length; i++) {\n      const stmt = statements[i];\n      const val = stmt.visitStatement(this, ctx);\n      if (val instanceof ReturnValue) {\n        return val;\n      }\n    }\n    return null;\n  }\n}\n\nfunction _declareFn(\n    varNames: string[], statements: o.Statement[], ctx: _ExecutionContext,\n    visitor: StatementInterpreter): Function {\n  return (...args: any[]) => _executeFunctionStatements(varNames, args, statements, ctx, visitor);\n}\n\nconst CATCH_ERROR_VAR = 'error';\nconst CATCH_STACK_VAR = 'stack';\n"]}