Allow for undefined return from TypeCheckerHost.getSourceFile to correspond with implementation

uniqueiniquity · uniqueiniquity · commit 1fc6675a2973 · 2018-01-19T16:23:23.000-08:00
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
@@ -2736,7 +2736,7 @@ namespace ts {
         getCompilerOptions(): CompilerOptions;
 
         getSourceFiles(): ReadonlyArray<SourceFile>;
-        getSourceFile(fileName: string): SourceFile;
+        getSourceFile(fileName: string): SourceFile | undefined;
         getResolvedTypeReferenceDirectives(): ReadonlyMap<ResolvedTypeReferenceDirective>;
     }
 

Original file line number	Diff line number	Diff line change
`@@ -2736,7 +2736,7 @@ namespace ts {`
`2736`	`2736`	`getCompilerOptions(): CompilerOptions;`
`2737`	`2737`
`2738`	`2738`	`getSourceFiles(): ReadonlyArray<SourceFile>;`
`2739`		`- getSourceFile(fileName: string): SourceFile;`
	`2739`	`+ getSourceFile(fileName: string): SourceFile \| undefined;`
`2740`	`2740`	`getResolvedTypeReferenceDirectives(): ReadonlyMap<ResolvedTypeReferenceDirective>;`
`2741`	`2741`	`}`
`2742`	`2742`