return typesEqual(mt.Key, mv.Key, seen) && typesEqual(mt.Elem, mv.Elem, seen)
	case abi.Pointer:
		pt := (*ptrtype)(unsafe.Pointer(t))
		pv := (*ptrtype)(unsafe.Pointer(v))
		return typesEqual(pt.Elem, pv.Elem, seen)
	case abi.Slice:
		st := (*slicetype)(unsafe.Pointer(t))
		sv := (*slicetype)(unsafe.Pointer(v))
		return typesEqual(st.Elem, sv.Elem, seen)
	case abi.Struct:
		st := (*structtype)(unsafe.Pointer(t))

havespan:
	if !traceDone {
		trace := traceAcquire()
		if trace.ok() {
			trace.GCSweepDone()
			traceRelease(trace)
		}
	}
	n := int(s.nelems) - int(s.allocCount)
	if n == 0 || s.freeindex == s.nelems || s.allocCount == s.nelems {
		throw("span has no free objects")
	}
	freeByteBase := s.freeindex &^ (64 - 1)
	whichByte := freeByteBase / 8
	// Init alloc bits cache.

	mark := s.mark()
	oneIteration := func(index, elem reflect.Value) {
		if len(r.Pipe.Decl) > 0 {
			if r.Pipe.IsAssign {
				// With two variables, index comes first.
				// With one, we use the element.
				if len(r.Pipe.Decl) > 1 {
					s.setVar(r.Pipe.Decl[0].Ident[0], index)
				} else {
					s.setVar(r.Pipe.Decl[0].Ident[0], elem)
				}
			} else {
				// Set top var (lexically the second if there

  // setHrefParam updates the specified parameter in the  href of an <a>
  // element to make it operate on the specified src.
  function setHrefParam(id, param, src) {
    const elem = document.getElementById(id);
    if (!elem) return;

    let url = new URL(elem.href);
    url.hash = '';

    // Copy params from this page's URL.
    const params = url.searchParams;
    for (const p of new URLSearchParams(window.location.search)) {

		at := (*arraytype)(unsafe.Pointer(typ))
		for i := uintptr(0); i < at.Len; i++ {
			if off < at.Elem.Size_ {
				cgoCheckUsingType(at.Elem, src, off, size)
			}
			src = add(src, at.Elem.Size_)
			skipped := off
			if skipped > at.Elem.Size_ {
				skipped = at.Elem.Size_
			}
			checked := at.Elem.Size_ - skipped
			off -= skipped
			if size <= checked {
				return
			}
			size -= checked
		}

		default:
			return ast.NewIdent(t.Name())
		}
	case *types.Pointer:
		x := TypeExpr(f, pkg, t.Elem())
		if x == nil {
			return nil
		}
		return &ast.UnaryExpr{
			Op: token.MUL,
			X:  x,
		}
	case *types.Array:
		elt := TypeExpr(f, pkg, t.Elem())
		if elt == nil {
			return nil
		}
		return &ast.ArrayType{
			Len: &ast.BasicLit{
				Kind:  token.INT,

		}
		return &(*u)(unsafe.Pointer(t)).u
	}
}

// Elem returns the element type for t if t is an array, channel, map, pointer, or slice, otherwise nil.
func (t *Type) Elem() *Type {
	switch t.Kind() {
	case Array:
		tt := (*ArrayType)(unsafe.Pointer(t))
		return tt.Elem
	case Chan:
		tt := (*ChanType)(unsafe.Pointer(t))
		return tt.Elem
	case Map:
		tt := (*MapType)(unsafe.Pointer(t))
		return tt.Elem

func (u *URL) JoinPath(elem ...string) *URL {
	elem = append([]string{u.EscapedPath()}, elem...)
	var p string
	if !strings.HasPrefix(elem[0], "/") {
		// Return a relative path if u is relative,
		// but ensure that it contains no ../ elements.
		elem[0] = "/" + elem[0]
		p = path.Join(elem...)[1:]
	} else {
		p = path.Join(elem...)
	}
	// path.Join will remove any trailing slashes.

// It also reports whether a Pointer was present.
func ReceiverNamed(recv *types.Var) (isPtr bool, named *types.Named) {
	t := recv.Type()
	if ptr, ok := aliases.Unalias(t).(*types.Pointer); ok {
		isPtr = true
		t = ptr.Elem()
	}
	named, _ = aliases.Unalias(t).(*types.Named)
	return
}

// Unpointer returns T given *T or an alias thereof.
// For all other types it is the identity function.
// It does not look at underlying types.

		name  string
		elems []string
		elem  string
		out   bool
	}{
		{"exists", []string{"1", "2", "3"}, "1", true},
		{"not exists", []string{"1", "2", "3"}, "4", false},
	}
	for _, test := range containsTests {
		t.Run(test.name, func(t *testing.T) {
			if out := Contains(test.elems, test.elem); test.out != out {
				t.Errorf("Contains(%v, %s) want: %t, got: %t", test.elems, test.elem, test.out, out)
			}
		})
	}
}