Function getCachedLibSourceFile

src/node/services/ptc/typeValidator.ts:45–60

(
  fileName: string,
  languageVersion: ts.ScriptTarget,
  readFile: () => string | undefined
)

  `${languageVersion}:${fileName}`;

function getCachedLibSourceFile(
  fileName: string,
  languageVersion: ts.ScriptTarget,
  readFile: () => string | undefined
): ts.SourceFile | undefined {
  const key = getLibCacheKey(fileName, languageVersion);
  const cached = libSourceFileCache.get(key);
  if (cached) return cached;

  const contents = readFile();
  if (!contents) return undefined;

  const sourceFile = ts.createSourceFile(fileName, contents, languageVersion, true);
  libSourceFileCache.set(key, sourceFile);
  return sourceFile;
}

function getCachedMuxSourceFile(muxTypes: string, languageVersion: ts.ScriptTarget): ts.SourceFile {
  const key = `${languageVersion}:${muxTypes}`;