[6a3a178] | 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const { RawSource } = require("webpack-sources");
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| 9 | const Generator = require("../Generator");
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| 10 | const InitFragment = require("../InitFragment");
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| 11 | const RuntimeGlobals = require("../RuntimeGlobals");
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| 12 | const Template = require("../Template");
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| 13 | const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");
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| 14 |
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| 15 | /** @typedef {import("webpack-sources").Source} Source */
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| 16 | /** @typedef {import("../DependencyTemplates")} DependencyTemplates */
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| 17 | /** @typedef {import("../Generator").GenerateContext} GenerateContext */
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| 18 | /** @typedef {import("../Module")} Module */
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| 19 | /** @typedef {import("../NormalModule")} NormalModule */
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| 20 | /** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
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| 21 |
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| 22 | const TYPES = new Set(["webassembly"]);
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| 23 |
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| 24 | class AsyncWebAssemblyJavascriptGenerator extends Generator {
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| 25 | constructor(filenameTemplate) {
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| 26 | super();
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| 27 | this.filenameTemplate = filenameTemplate;
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| 28 | }
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| 29 |
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| 30 | /**
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| 31 | * @param {NormalModule} module fresh module
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| 32 | * @returns {Set<string>} available types (do not mutate)
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| 33 | */
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| 34 | getTypes(module) {
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| 35 | return TYPES;
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| 36 | }
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| 37 |
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| 38 | /**
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| 39 | * @param {NormalModule} module the module
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| 40 | * @param {string=} type source type
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| 41 | * @returns {number} estimate size of the module
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| 42 | */
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| 43 | getSize(module, type) {
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| 44 | return 40 + module.dependencies.length * 10;
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| 45 | }
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| 46 |
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| 47 | /**
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| 48 | * @param {NormalModule} module module for which the code should be generated
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| 49 | * @param {GenerateContext} generateContext context for generate
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| 50 | * @returns {Source} generated code
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| 51 | */
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| 52 | generate(module, generateContext) {
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| 53 | const {
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| 54 | runtimeTemplate,
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| 55 | chunkGraph,
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| 56 | moduleGraph,
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| 57 | runtimeRequirements,
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| 58 | runtime
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| 59 | } = generateContext;
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| 60 | runtimeRequirements.add(RuntimeGlobals.module);
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| 61 | runtimeRequirements.add(RuntimeGlobals.moduleId);
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| 62 | runtimeRequirements.add(RuntimeGlobals.exports);
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| 63 | runtimeRequirements.add(RuntimeGlobals.instantiateWasm);
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| 64 | /** @type {InitFragment[]} */
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| 65 | const initFragments = [];
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| 66 | /** @type {Map<Module, { request: string, importVar: string }>} */
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| 67 | const depModules = new Map();
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| 68 | /** @type {Map<string, WebAssemblyImportDependency[]>} */
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| 69 | const wasmDepsByRequest = new Map();
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| 70 | for (const dep of module.dependencies) {
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| 71 | if (dep instanceof WebAssemblyImportDependency) {
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| 72 | const module = moduleGraph.getModule(dep);
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| 73 | if (!depModules.has(module)) {
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| 74 | depModules.set(module, {
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| 75 | request: dep.request,
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| 76 | importVar: `WEBPACK_IMPORTED_MODULE_${depModules.size}`
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| 77 | });
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| 78 | }
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| 79 | let list = wasmDepsByRequest.get(dep.request);
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| 80 | if (list === undefined) {
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| 81 | list = [];
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| 82 | wasmDepsByRequest.set(dep.request, list);
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| 83 | }
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| 84 | list.push(dep);
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | const promises = [];
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| 89 |
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| 90 | const importStatements = Array.from(
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| 91 | depModules,
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| 92 | ([importedModule, { request, importVar }]) => {
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| 93 | if (moduleGraph.isAsync(importedModule)) {
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| 94 | promises.push(importVar);
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| 95 | }
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| 96 | return runtimeTemplate.importStatement({
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| 97 | update: false,
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| 98 | module: importedModule,
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| 99 | chunkGraph,
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| 100 | request,
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| 101 | originModule: module,
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| 102 | importVar,
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| 103 | runtimeRequirements
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| 104 | });
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| 105 | }
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| 106 | );
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| 107 | const importsCode = importStatements.map(([x]) => x).join("");
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| 108 | const importsCompatCode = importStatements.map(([_, x]) => x).join("");
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| 109 |
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| 110 | const importObjRequestItems = Array.from(
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| 111 | wasmDepsByRequest,
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| 112 | ([request, deps]) => {
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| 113 | const exportItems = deps.map(dep => {
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| 114 | const importedModule = moduleGraph.getModule(dep);
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| 115 | const importVar = depModules.get(importedModule).importVar;
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| 116 | return `${JSON.stringify(
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| 117 | dep.name
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| 118 | )}: ${runtimeTemplate.exportFromImport({
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| 119 | moduleGraph,
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| 120 | module: importedModule,
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| 121 | request,
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| 122 | exportName: dep.name,
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| 123 | originModule: module,
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| 124 | asiSafe: true,
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| 125 | isCall: false,
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| 126 | callContext: false,
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| 127 | defaultInterop: true,
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| 128 | importVar,
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| 129 | initFragments,
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| 130 | runtime,
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| 131 | runtimeRequirements
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| 132 | })}`;
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| 133 | });
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| 134 | return Template.asString([
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| 135 | `${JSON.stringify(request)}: {`,
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| 136 | Template.indent(exportItems.join(",\n")),
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| 137 | "}"
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| 138 | ]);
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| 139 | }
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| 140 | );
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| 141 |
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| 142 | const importsObj =
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| 143 | importObjRequestItems.length > 0
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| 144 | ? Template.asString([
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| 145 | "{",
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| 146 | Template.indent(importObjRequestItems.join(",\n")),
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| 147 | "}"
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| 148 | ])
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| 149 | : undefined;
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| 150 |
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| 151 | const instantiateCall =
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| 152 | `${RuntimeGlobals.instantiateWasm}(${module.exportsArgument}, ${
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| 153 | module.moduleArgument
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| 154 | }.id, ${JSON.stringify(
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| 155 | chunkGraph.getRenderedModuleHash(module, runtime)
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| 156 | )}` + (importsObj ? `, ${importsObj})` : `)`);
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| 157 |
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| 158 | if (promises.length > 0)
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| 159 | runtimeRequirements.add(RuntimeGlobals.asyncModule);
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| 160 |
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| 161 | const source = new RawSource(
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| 162 | promises.length > 0
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| 163 | ? Template.asString([
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| 164 | `var __webpack_instantiate__ = ${runtimeTemplate.basicFunction(
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| 165 | `[${promises.join(", ")}]`,
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| 166 | `${importsCompatCode}return ${instantiateCall};`
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| 167 | )}`,
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| 168 | `${RuntimeGlobals.asyncModule}(${
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| 169 | module.moduleArgument
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| 170 | }, ${runtimeTemplate.basicFunction(
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| 171 | "__webpack_handle_async_dependencies__",
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| 172 | [
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| 173 | importsCode,
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| 174 | `var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${promises.join(
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| 175 | ", "
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| 176 | )}]);`,
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| 177 | "return __webpack_async_dependencies__.then ? __webpack_async_dependencies__.then(__webpack_instantiate__) : __webpack_instantiate__(__webpack_async_dependencies__);"
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| 178 | ]
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| 179 | )}, 1);`
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| 180 | ])
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| 181 | : `${importsCode}${importsCompatCode}module.exports = ${instantiateCall};`
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| 182 | );
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| 183 |
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| 184 | return InitFragment.addToSource(source, initFragments, generateContext);
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| 185 | }
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| 186 | }
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| 187 |
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| 188 | module.exports = AsyncWebAssemblyJavascriptGenerator;
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