import (
	"io"
)

// Discard is just like io.Discard without the io.ReaderFrom compatible
// implementation which is buggy on NUMA systems, we have to use a simpler
// io.Writer implementation alone avoids also unnecessary buffer copies,
// and as such incurred latencies.
var Discard io.Writer = discard{}

// discard is /dev/null for Golang.
type discard struct{}

func (discard) Write(p []byte) (int, error) {

	"lipaw":    0x63,
	"ltg1929":  0x34,
	"ltg2007":  0x35,
	"luna1918": 0x36,
	"metelko":  0x37,
	"monoton":  0x38,
	"ndyuka":   0x39,
	"nedis":    0x3a,
	"newfound": 0x3b,
	"nicard":   0x3c,
	"njiva":    0x64,
	"nulik":    0x3d,
	"osojs":    0x65,
	"oxendict": 0x3e,
	"pahawh2":  0x3f,
	"pahawh3":  0x40,
	"pahawh4":  0x41,
	"pamaka":   0x42,
	"peano":    0x43,

    void setMutationValidator(MutationValidator validator);

    DependencySubstitutionsInternal copy();

    /**
     * Discard all state held by this container.
     */
    void discard();

 */
public class MessageHub implements AsyncStoppable {
    private enum State {Running, Stopping, Stopped}

    private static final Discard DISCARD = new Discard();
    private final ManagedExecutor workers;
    private final String displayName;
    private final Action<? super Throwable> errorHandler;
    private final Lock lock = new ReentrantLock();

func NopCloser(r io.Reader) io.ReadCloser {
	return io.NopCloser(r)
}

// Discard is an io.Writer on which all Write calls succeed
// without doing anything.
//
// Deprecated: As of Go 1.16, this value is simply [io.Discard].

 */
class NativeToolChainDiscoveryIntegrationTest extends AbstractInstalledToolChainIntegrationSpec {

    def helloWorldApp = new CppCompilerDetectingTestApp()

    def setup() {
        // Discard init script content generated by superclass
        initScript.text = ""
    }

    @ToBeFixedForConfigurationCache
    def "can discover tool chain in environment"() {
        given:

        synchronized (lock) {
            try {
                // These files have an unreliable timestamp - discard any cached state for them and rehash next time they are seen
                if (currentTimestamp == getLastBuildTimestamp()) {
                    for (String path : filesWithCurrentTimestamp) {
                        fileHasher.discard(path);
                    }
                }
            } finally {

		Delay: make([]int, 1),
	}
	if err := EncodeAll(io.Discard, g0); err == nil {
		t.Error("expected error from mismatched delay and image slice lengths")
	}

	g1 := &GIF{
		Image:    images,
		Delay:    make([]int, len(images)),
		Disposal: make([]byte, 1),
	}
	for i := range g1.Disposal {
		g1.Disposal[i] = DisposalNone
	}
	if err := EncodeAll(io.Discard, g1); err == nil {

	Error(context.Context, string, ...interface{})
	Trace(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error)
}

var (
	// Discard logger will print any log to io.Discard
	Discard = New(log.New(io.Discard, "", log.LstdFlags), Config{})
	// Default Default logger
	Default = New(log.New(os.Stdout, "\r\n", log.LstdFlags), Config{
		SlowThreshold:             200 * time.Millisecond,

		"a\tb\t\td\n" + // hard tabs - do not discard column
			"a\tb\t\td\te\n" +
			"a\n" +
			"a\tb\tc\td\n" +
			"a\tb\tc\td\te\n",

		"a\tb\t\td\n" +
			"a\tb\t\td\te\n" +
			"a\n" +
			"a\tb\tc\td\n" +
			"a\tb\tc\td\te\n",
	},

	{
		"16c debug",
		100, 100, 0, '\t', DiscardEmptyColumns | Debug,
		"a\tb\t\td\n" + // hard tabs - do not discard column
			"a\tb\t\td\te\n" +
			"a\n" +