type String string

type PtrInterfaceItem struct {
	Str1 any // basic
	Str2 any // derived
}

// We'll send pointers; should receive values.
// Also check that we can register T but send *T.
func TestInterfacePointer(t *testing.T) {
	b := new(bytes.Buffer)
	str1 := "howdy"
	str2 := String("kiddo")
	item1 := &PtrInterfaceItem{
		&str1,
		&str2,
	}
	// Register the type.
	Register(str2)

}

func (b *Buffer) baz() { // ERROR "b does not escape$"
	b.str1 = b.str1[1:2] // ERROR "\(\*Buffer\).baz ignoring self-assignment in b.str1 = b.str1\[1:2\]$"
	b.str1 = b.str2[1:2] // ERROR "\(\*Buffer\).baz ignoring self-assignment in b.str1 = b.str2\[1:2\]$"
}

func (b *Buffer) bat() { // ERROR "leaking param content: b$"

}

func (b *Buffer) baz() { // ERROR "b does not escape$"
	b.str1 = b.str1[1:2] // ERROR "\(\*Buffer\).baz ignoring self-assignment in b.str1 = b.str1\[1:2\]$"
	b.str1 = b.str2[1:2] // ERROR "\(\*Buffer\).baz ignoring self-assignment in b.str1 = b.str2\[1:2\]$"
}

func (b *Buffer) bat() { // ERROR "leaking param content: b$"

	m.Set("map1", &m1)
	m1.Add("a", 1)
	m1.Add("z", 2)
	m.Set("map2", &m2)
	for i := 0; i < 9; i++ {
		m2.Add(strconv.Itoa(i), int64(i))
	}
	var s1, s2 String
	m.Set("str1", &s1)
	s1.Set("hello, world!")
	m.Set("str2", &s2)
	s2.Set("fizz buzz")
	b.ResetTimer()

	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		_ = m.String()
	}
}

func BenchmarkRealworldExpvarUsage(b *testing.B) {

	}
	memberMatcher := regexp.MustCompile(EntryMemberPattern)
	list := memberMatcher.ReplaceAllString(string(out[:]), "")
	strs := strings.Split(list, "\n")
	results := make([]string, 0)
	for i := range strs {
		if len(strs[i]) > 0 {
			results = append(results, strs[i])
		}
	}
	return results, nil
}

// GetVersion returns the version string.
func (runner *runner) GetVersion() (string, error) {

				args[1] = fmt.Sprintf("$%s(SB)", s)
			}
		}
	}

	// Move addressing mode into opcode suffix.
	suffix := ""
	switch inst.Op {
	case LDR, LDRB, LDRH, LDRSB, LDRSH, LDRSW, STR, STRB, STRH, STUR, STURB, STURH, LD1, ST1:
		switch mem := inst.Args[1].(type) {
		case MemImmediate:
			switch mem.Mode {
			case AddrOffset:
				// no suffix
			case AddrPreIndex:
				suffix = ".W"

		Bloc("b1",
			Valu("ptr1", OpAddr, ptrType, 0, nil, "sb"),
			Goto("checkPtr")),
		Bloc("b2",
			Valu("ptr2", OpAddr, ptrType, 0, nil, "sb"),
			Goto("checkPtr")),
		// both ptr1 and ptr2 are guaranteed non-nil here
		Bloc("checkPtr",
			Valu("phi", OpPhi, ptrType, 0, nil, "ptr1", "ptr2"),
			Valu("bool2", OpIsNonNil, c.config.Types.Bool, 0, nil, "phi"),
			If("bool2", "extra", "exit")),
		Bloc("extra",

(MOVWload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _))  && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x
(MOVFload [off] {sym} ptr (MOVFstore [off2] {sym2} ptr2 x _))  && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x
(MOVDload [off] {sym} ptr (MOVDstore [off2] {sym2} ptr2 x _))  && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x

// store zero

    ```

The query parameter `q` is of type `Union[str, None]` (or `str | None` in Python 3.10), that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

!!! note
    FastAPI will know that the value of `q` is not required because of the default value `= None`.

		slice.SetType(s.Type())
		slice.SetBounded(true)

		ptr1, len1 := backingArrayPtrLen(cheapExpr(slice, &nodes))
		ptr2, len2 := backingArrayPtrLen(l2)

		fn := typecheck.LookupRuntime("slicecopy", ptr1.Type().Elem(), ptr2.Type().Elem())
		ncopy = mkcall1(fn, types.Types[types.TINT], &nodes, ptr1, len1, ptr2, len2, ir.NewInt(base.Pos, elemtype.Size()))
	} else {
		// memmove(&s[idx], &l2[0], len(l2)*sizeof(T))