Function createIncrementalProgram

test/fixtures/snapshot/typescript.js:123309–123315

(_a)

    }
    ts.createIncrementalCompilerHost = createIncrementalCompilerHost;
    function createIncrementalProgram(_a) {
        var rootNames = _a.rootNames, options = _a.options, configFileParsingDiagnostics = _a.configFileParsingDiagnostics, projectReferences = _a.projectReferences, host = _a.host, createProgram = _a.createProgram;
        host = host || createIncrementalCompilerHost(options);
        createProgram = createProgram || ts.createEmitAndSemanticDiagnosticsBuilderProgram;
        var oldProgram = readBuilderProgram(options, host);
        return createProgram(rootNames, options, host, oldProgram, configFileParsingDiagnostics, projectReferences);
    }
    ts.createIncrementalProgram = createIncrementalProgram;
    function createWatchCompilerHost(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus, projectReferencesOrWatchOptionsToExtend, watchOptionsOrExtraFileExtensions) {
        if (ts.isArray(rootFilesOrConfigFileName)) {