'use strict';1exports.__esModule = true;23const pattern = /(^|;)\s*(export|import)((\s+\w)|(\s*[{*=]))|import\(/m;4/**5* detect possible imports/exports without a full parse.6*7* A negative test means that a file is definitely _not_ a module.8* A positive test means it _could_ be.9*10* Not perfect, just a fast way to disqualify large non-ES6 modules and11* avoid a parse.12* @type {RegExp}13*/14exports.test = function isMaybeUnambiguousModule(content) {15return pattern.test(content);16};1718// future-/Babel-proof at the expense of being a little loose19const unambiguousNodeType = /^(?:(?:Exp|Imp)ort.*Declaration|TSExportAssignment)$/;2021/**22* Given an AST, return true if the AST unambiguously represents a module.23* @param {Program node} ast24* @return {Boolean}25*/26exports.isModule = function isUnambiguousModule(ast) {27return ast.body && ast.body.some(node => unambiguousNodeType.test(node.type));28};293031