Use derived isolatedModules flag

Author: weswigham

internal/compiler/emitter.go

@@ -87,7 +87,7 @@ func getScriptTransformers(emitContext *printer.EmitContext, host printer.EmitHo
 
 	var emitResolver printer.EmitResolver
 	var referenceResolver binder.ReferenceResolver
-	if importElisionEnabled || options.GetJSXTransformEnabled() || !options.IsolatedModules.IsTrue() { // full emit resolver is needed for import ellision and const enum inlining
+	if importElisionEnabled || options.GetJSXTransformEnabled() || !options.GetIsolatedModules() { // full emit resolver is needed for import ellision and const enum inlining
 		emitResolver = host.GetEmitResolver()
 		emitResolver.MarkLinkedReferencesRecursively(sourceFile)
 		referenceResolver = emitResolver
@@ -131,7 +131,7 @@ func getScriptTransformers(emitContext *printer.EmitContext, host printer.EmitHo
 	tx = append(tx, getModuleTransformer(&opts))
 
 	// inlining (formerly done via substitutions)
-	if !options.IsolatedModules.IsTrue() {
+	if !options.GetIsolatedModules() {
 		tx = append(tx, inliners.NewConstEnumInliningTransformer(&opts))
 	}
 	return tx

internal/transformers/inliners/constenum.go

@@ -22,7 +22,7 @@ type ConstEnumInliningTransformer struct {
 func NewConstEnumInliningTransformer(opt *transformers.TransformOptions) *transformers.Transformer {
 	compilerOptions := opt.CompilerOptions
 	emitContext := opt.Context
-	if compilerOptions.IsolatedModules.IsTrue() {
+	if compilerOptions.GetIsolatedModules() {
 		debug.Fail("const enums are not inlined under isolated modules")
 	}
 	tx := &ConstEnumInliningTransformer{compilerOptions: compilerOptions, emitResolver: opt.EmitResolver}

testdata/baselines/reference/submodule/compiler/blockScopedEnumVariablesUseBeforeDef_verbatimModuleSyntax.js

@@ -29,14 +29,14 @@ function foo1() {
     })(E || (E = {}));
 }
 function foo2() {
-    return 0 /* E.A */;
+    return E.A;
     let E;
     (function (E) {
         E[E["A"] = 0] = "A";
     })(E || (E = {}));
 }
 const config = {
-    a: 2 /* AfterObject.A */,
+    a: AfterObject.A,
 };
 var AfterObject;
 (function (AfterObject) {

testdata/baselines/reference/submodule/compiler/blockScopedEnumVariablesUseBeforeDef_verbatimModuleSyntax.js.diff

@@ -73,7 +73,7 @@ declare const console: { log(msg: any): void; };
 //// [/home/src/workspaces/solution/project/index.js] *new* 
 import { E } from "../preserve";
 import { F } from "../no-preserve";
-1 /* E.A */;
-1 /* F.A */;
+E.A;
+F.A;