diff options
Diffstat (limited to 'node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js')
| -rw-r--r-- | node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js b/node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js new file mode 100644 index 00000000..db78aecc --- /dev/null +++ b/node_modules/webpack/lib/dependencies/HarmonyExportExpressionDependency.js @@ -0,0 +1,207 @@ +/* + 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 propertyAccess = require("../util/propertyAccess"); +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 */ +/** @typedef {import("../javascript/JavascriptParser").Range} Range */ +/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */ +/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */ + +class HarmonyExportExpressionDependency extends NullDependency { + /** + * @param {Range} range range + * @param {Range} rangeStatement range statement + * @param {string} prefix prefix + * @param {string | { range: Range, prefix: string, suffix: string }} [declarationId] declaration id + */ + 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"], + priority: 1, + 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; + } + + /** + * @param {ObjectSerializerContext} context context + */ + serialize(context) { + const { write } = context; + write(this.range); + write(this.rangeStatement); + write(this.prefix); + write(this.declarationId); + super.serialize(context); + } + + /** + * @param {ObjectDeserializerContext} context 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 { + /** @type {string} */ + 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 */ ${exportsName}${propertyAccess( + typeof used === "string" ? [used] : 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; |