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rOACCT/node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js
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HarmonyExportExpressionDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ConcatenationScope = require("../ConcatenationScope");
const RuntimeGlobals = require("../RuntimeGlobals");
const makeSerializable = require("../util/makeSerializable");
const HarmonyExportInitFragment = require("./HarmonyExportInitFragment");
const NullDependency = require("./NullDependency");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
class HarmonyExportExpressionDependency extends NullDependency {
constructor(range, rangeStatement, prefix, declarationId) {
super();
this.range = range;
this.rangeStatement = rangeStatement;
this.prefix = prefix;
this.declarationId = declarationId;
}
get type() {
return "harmony export expression";
}
/**
* Returns the exported names
* @param {ModuleGraph} moduleGraph module graph
* @returns {ExportsSpec | undefined} export names
*/
getExports(moduleGraph) {
return {
exports: ["default"],
terminalBinding: true,
dependencies: undefined
};
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {ConnectionState} how this dependency connects the module to referencing modules
*/
getModuleEvaluationSideEffectsState(moduleGraph) {
// The expression/declaration is already covered by SideEffectsFlagPlugin
return false;
}
serialize(context) {
const { write } = context;
write(this.range);
write(this.rangeStatement);
write(this.prefix);
write(this.declarationId);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.range = read();
this.rangeStatement = read();
this.prefix = read();
this.declarationId = read();
super.deserialize(context);
}
}
makeSerializable(
HarmonyExportExpressionDependency,
"webpack/lib/dependencies/HarmonyExportExpressionDependency"
);
HarmonyExportExpressionDependency.Template = class HarmonyExportDependencyTemplate extends (
NullDependency.Template
) {
/**
* @param {Dependency} dependency the dependency for which the template should be applied
* @param {ReplaceSource} source the current replace source which can be modified
* @param {DependencyTemplateContext} templateContext the context object
* @returns {void}
*/
apply(
dependency,
source,
{
module,
moduleGraph,
runtimeTemplate,
runtimeRequirements,
initFragments,
runtime,
concatenationScope
}
) {
const dep = /** @type {HarmonyExportExpressionDependency} */ (dependency);
const { declarationId } = dep;
const exportsName = module.exportsArgument;
if (declarationId) {
let name;
if (typeof declarationId === "string") {
name = declarationId;
} else {
name = ConcatenationScope.DEFAULT_EXPORT;
source.replace(
declarationId.range[0],
declarationId.range[1] - 1,
`${declarationId.prefix}${name}${declarationId.suffix}`
);
}
if (concatenationScope) {
concatenationScope.registerExport("default", name);
} else {
const used = moduleGraph
.getExportsInfo(module)
.getUsedName("default", runtime);
if (used) {
const map = new Map();
map.set(used, `/* export default binding */ ${name}`);
initFragments.push(new HarmonyExportInitFragment(exportsName, map));
}
}
source.replace(
dep.rangeStatement[0],
dep.range[0] - 1,
`/* harmony default export */ ${dep.prefix}`
);
} else {
let content;
const name = ConcatenationScope.DEFAULT_EXPORT;
if (runtimeTemplate.supportsConst()) {
content = `/* harmony default export */ const ${name} = `;
if (concatenationScope) {
concatenationScope.registerExport("default", name);
} else {
const used = moduleGraph
.getExportsInfo(module)
.getUsedName("default", runtime);
if (used) {
runtimeRequirements.add(RuntimeGlobals.exports);
const map = new Map();
map.set(used, name);
initFragments.push(new HarmonyExportInitFragment(exportsName, map));
} else {
content = `/* unused harmony default export */ var ${name} = `;
}
}
} else if (concatenationScope) {
content = `/* harmony default export */ var ${name} = `;
concatenationScope.registerExport("default", name);
} else {
const used = moduleGraph
.getExportsInfo(module)
.getUsedName("default", runtime);
if (used) {
runtimeRequirements.add(RuntimeGlobals.exports);
// This is a little bit incorrect as TDZ is not correct, but we can't use const.
content = `/* harmony default export */ ${exportsName}[${JSON.stringify(
used
)}] = `;
} else {
content = `/* unused harmony default export */ var ${name} = `;
}
}
if (dep.range) {
source.replace(
dep.rangeStatement[0],
dep.range[0] - 1,
content + "(" + dep.prefix
);
source.replace(dep.range[1], dep.rangeStatement[1] - 0.5, ");");
return;
}
source.replace(dep.rangeStatement[0], dep.rangeStatement[1] - 1, content);
}
}
};
module.exports = HarmonyExportExpressionDependency;
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