case myint:
		println("myint", x.foo())
	default:
		println("other", x.foo())
	}
}
func main() {
	f[myfloat](myint(6))
	f[myfloat](myfloat(7))
	f[myfloat](myint32(8))
	f[myint32](myint32(8))
	f[myint32](myfloat(7))
	f[myint](myint32(9))
	f[I](myint(10))
	f[J](myint(11))
	f[J](myint32(12))

type BasicInfo int

// Properties of basic types.
const (
	IsBoolean BasicInfo = 1 << iota
	IsInteger
	IsUnsigned
	IsFloat
	IsComplex
	IsString
	IsUntyped

	IsOrdered   = IsInteger | IsFloat | IsString
	IsNumeric   = IsInteger | IsFloat | IsComplex
	IsConstType = IsBoolean | IsNumeric | IsString
)

// A Basic represents a basic type.
type Basic struct {
	kind BasicKind

	asChan(Chan(nil))
	isChan(Chan(nil))

	asFloat(f)
	isFloat(f)
	asFloat(-f)
	isFloat(-f)
	asFloat(+f)
	isFloat(+f)
	asFloat(f + 1)
	isFloat(f + 1)
	asFloat(1 + f)
	isFloat(1 + f)
	asFloat(f + f)
	isFloat(f + f)
	f++
	f += 2
	asFloat(f - 1)
	isFloat(f - 1)
	asFloat(1 - f)
	isFloat(1 - f)
	asFloat(f - f)
	isFloat(f - f)
	f--
	f -= 2
	asFloat(f * 2.5)
	isFloat(f * 2.5)

func (x myint) foo() int { return int(x) }

type myfloat float64

func (x myfloat) foo() int { return int(x) }

type myint32 int32

func (x myint32) foo() int { return int(x) }
func (x myint32) bar()     {}

func f[T I](i I) {
	switch x := i.(type) {
	case T, myint32:
		println("T/myint32", x.foo())
	default:
		println("other", x.foo())
	}
}
func main() {
	f[myfloat](myint(6))
	f[myfloat](myfloat(7))

		println("barT")
	case myint:
		println("myint")
	case myfloat:
		println("myfloat")
	default:
		println("other")
	}
}

type myint int
func (myint) foo() {
}
func (x myint) bar() int {
	return int(x)
}

type myfloat float64
func (myfloat) foo() {
}

func main() {
	f[int](nil)
	f[int](myint(6))
	f[int](myfloat(7))

func (x myint) foo() int {return int(x)}

type myfloat float64
func (x myfloat) foo() float64 {return float64(x) }

func f[T any](i interface{}) {
	switch x := i.(type) {
	case interface { foo() T }:
		println("fooer", x.foo())
	default:
		println("other")
	}
}
func main() {
	f[int](myint(6))
	f[int](myfloat(7))
	f[float64](myint(8))
	f[float64](myfloat(9))

func f1[P int | string]()            {}
func f2[P ~int | string | float64]() {}
func f3[P int](x P)                  {}

type myInt int
type myFloat float64

func _() {
	_ = f1[int]
	_ = f1[myInt /* ERROR "possibly missing ~ for int in int | string" */]
	_ = f2[myInt]
	_ = f2[myFloat /* ERROR "possibly missing ~ for float64 in ~int | string | float64" */]
	var x myInt

	return x.(T)
}
func f2[T any](x interface{}) (T, bool) {
	t, ok := x.(T)
	return t, ok
}

type I interface {
	foo()
}

type myint int

func (myint) foo() {
}

type myfloat float64

func (myfloat) foo() {
}

func g[T I](x I) T {
	return x.(T)
}
func g2[T I](x I) (T, bool) {
	t, ok := x.(T)
	return t, ok
}

func h[T any](x interface{}) struct{ a, b T } {

type BasicInfo int

// Properties of basic types.
const (
	IsBoolean BasicInfo = 1 << iota
	IsInteger
	IsUnsigned
	IsFloat
	IsComplex
	IsString
	IsUntyped

	IsOrdered   = IsInteger | IsFloat | IsString
	IsNumeric   = IsInteger | IsFloat | IsComplex
	IsConstType = IsBoolean | IsNumeric | IsString
)

// A Basic represents a basic type.
type Basic struct {
	kind BasicKind

	"cmd/compile/internal/types"
	"math"
)

func softfloat(f *Func) {
	if !f.Config.SoftFloat {
		return
	}
	newInt64 := false

	for _, b := range f.Blocks {
		for _, v := range b.Values {
			if v.Type.IsFloat() {
				f.unCache(v)
				switch v.Op {
				case OpPhi, OpLoad, OpArg:
					if v.Type.Size() == 4 {
						v.Type = f.Config.Types.UInt32
					} else {
						v.Type = f.Config.Types.UInt64
					}