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readFile may return undefined

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This commit is contained in:
Andy Hanson
2017-07-14 14:26:13 -07:00
parent e8421827e0
commit 96d537bc54
16 changed files with 44 additions and 45 deletions
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6
src/compiler/sys.ts
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@@ -23,7 +23,7 @@ namespace ts {
newLine: string;
useCaseSensitiveFileNames: boolean;
write(s: string): void;
readFile(path: string, encoding?: string): string;
readFile(path: string, encoding?: string): string | undefined;
getFileSize?(path: string): number;
writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
/**
@@ -97,7 +97,7 @@ namespace ts {
directoryExists(path: string): boolean;
createDirectory(path: string): void;
resolvePath(path: string): string;
readFile(path: string): string;
readFile(path: string): string | undefined;
writeFile(path: string, contents: string): void;
getDirectories(path: string): string[];
readDirectory(path: string, extensions?: ReadonlyArray<string>, basePaths?: ReadonlyArray<string>, excludeEx?: string, includeFileEx?: string, includeDirEx?: string): string[];
@@ -204,7 +204,7 @@ namespace ts {
const platform: string = _os.platform();
const useCaseSensitiveFileNames = isFileSystemCaseSensitive();
function readFile(fileName: string, _encoding?: string): string {
function readFile(fileName: string, _encoding?: string): string | undefined {
if (!fileExists(fileName)) {
return undefined;
}