fix: address some comments

lib/wasm/WasmFinalizeExportsPlugin.js

@@ -4,46 +4,47 @@
 	*/
 "use strict";
 
-const Queue = require("../util/Queue");
-const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");
 const UnsupportedWebAssemblyFeatureError = require("../wasm/UnsupportedWebAssemblyFeatureError");
 
+const error = new UnsupportedWebAssemblyFeatureError(
+	"JavaScript modules can not use a WebAssembly export with an incompatible type signature"
+);
+
 class WasmFinalizeExportsPlugin {
 	apply(compiler) {
 		compiler.hooks.compilation.tap("WasmFinalizeExportsPlugin", compilation => {
 			compilation.hooks.finishModules.tap(
 				"WasmFinalizeExportsPlugin",
 				modules => {
-					const queue = new Queue();
-
-					let module;
-					let jsIncompatibleExports = [];
-
 					for (const module of modules) {
-						if (module.buildMeta.jsIncompatibleExports) {
-							jsIncompatibleExports.push(
-								...module.buildMeta.jsIncompatibleExports
-							);
+						const jsIncompatibleExports =
+							module.buildMeta.jsIncompatibleExports;
+
+						if (
+							typeof jsIncompatibleExports === "undefined" ||
+							jsIncompatibleExports.length === 0
+						) {
+							continue;
 						}
 
-						queue.enqueue(module);
-					}
+						// 1. if a WebAssembly module
+						if (module.type.startsWith("webassembly") === true) {
+							for (const reason of module.reasons) {
+								// 2. is referenced by a non-WebAssembly module
+								if (reason.module.type.startsWith("webassembly") === false) {
+									// const ref = reason.dependency.getReference();
 
-					while (queue.length > 0) {
-						module = queue.dequeue();
+									// ref.importedNames // returns true?
 
-						// 1. if a non WebAssembly module
-						if (module.type.startsWith("webassembly") === false) {
-							for (const dep of module.dependencies) {
-								// 2. imports a WebAssembly module
-								// FIXME(sven): pseudo code from here
-								if (dep.type === "webassembly") {
-									// 3. if the used import is flaged as invalid
-									if (jsIncompatibleExports.indexOf(dep.usedName)) {
-										throw new UnsupportedWebAssemblyFeatureError(
-											"JavaScript modules can not use WebAssembly export with an incompatible type signature"
-										);
+									const names = [];
+
+									names.forEach(name => {
+										// 3. and uses a func with an incompatible JS signature
+										if (jsIncompatibleExports.indexOf(name) !== -1) {
+											// 4. error
+											compilation.errors.push(error);
 										}
+									});
 								}
 							}
 						}

test/cases/wasm/js-incompatible-type/index.js

@@ -1,9 +1,13 @@
 it("should disallow exporting a func signature with result i64", function() {
-    return expect(import("./export-i64-result.wat")).rejects.toThrow(/invalid type/);
+	return import("./export-i64-result.wat").then(({a}) => {
+		expect(a).toThrow(/invalid type/);
+	});
 });
 
 it("should disallow exporting a func signature with param i64", function() {
-    return expect(import("./export-i64-param.wat")).rejects.toThrow(/invalid type/);
+	return import("./export-i64-param.wat").then(({a}) => {
+		expect(a).toThrow(/invalid type/);
+	});
 });
 
 it("should disallow importing a value type of i64", function() {