// Examples from the language spec section on string conversions.

package main

func main() {
	// 1
	_ = string('a')  // "a"
	_ = string(-1)   // "\ufffd" == "\xef\xbf\xbd"
	_ = string(0xf8) // "\u00f8" == "ø" == "\xc3\xb8"

	type myString string
	_ = myString(0x65e5) // "\u65e5" == "日" == "\xe6\x97\xa5"

	// 2
	_ = string([]byte{'h', 'e', 'l', 'l', '\xc3', '\xb8'}) // "hellø"

	checkBytes([]byte(""), `[]byte("")`)
	checkBytes([]byte(mystring("")), `[]byte(mystring(""))`)
	checkBytes(mybytes(""), `mybytes("")`)
	checkBytes(mybytes(mystring("")), `mybytes(mystring(""))`)

	checkRunes([]rune(""), `[]rune("")`)
	checkRunes([]rune(mystring("")), `[]rune(mystring(""))`)
	checkRunes(myrunes(""), `myrunes("")`)
	checkRunes(myrunes(mystring("")), `myrunes(mystring(""))`)

	"fmt"

	"cmd/compile/internal/test/testdata/mysort"
)

type MyString struct {
	string
}

func (a *MyString) Less(b *MyString) bool {
	return a.string < b.string
}

func main() {
	mysort.F()

	sl1 := []*mysort.MyInt{{7}, {1}, {4}, {6}}
	mysort.Sort(sl1)
	fmt.Printf("%v %v %v %v\n", sl1[0], sl1[1], sl1[2], sl1[3])

	sl2 := []*MyString{{"when"}, {"in"}, {"the"}, {"course"}, {"of"}}
	mysort.Sort(sl2)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package p

type myString string

func _[P ~string | ~[]byte | ~[]rune]() {
	_ = P("")
	const s myString = ""
	_ = P(s)
}

func _[P myString]() {
	_ = P("")

func string_conversions() {
	const A = string(65)
	assert(A == "A")
	const E = string(-1)
	assert(E == "\uFFFD")
	assert(E == string(1234567890))

	type myint int
	assert(A == string(myint(65)))

	type mystring string
	const _ mystring = mystring("foo")

	const _ = string(true /* ERROR "cannot convert" */ )
	const _ = string(1.2 /* ERROR "cannot convert" */ )
	const _ = string(nil /* ERROR "cannot convert" */ )

	case T:
		return v
	default:
		var z T
		return z
	}
}

type Mystring string

func (Mystring) Foo() {
}

func Conv4(v interface{Foo()}) Mystring {
	return conv4[Mystring](v)
}

func conv4[T interface{Foo()}](v interface{Foo()}) T {
	switch v := v.(type) {
	case T:
		return v
	default:
		var z T
		return z
	}

func g3[T any](*T, ...T) {}

func _() {
	type intSlice []int
	g1([]int{})
	g1(intSlice{})
	g2(nil, 0)

	type myString string
	var s1 string
	g3(nil, "1", myString("2"), "3")
	g3(& /* ERROR "cannot use &s1 (value of type *string) as *myString value in argument to g3" */ s1, "1", myString("2"), "3")
	_ = s1

	type myStruct struct{x int}
	var s2 myStruct
	g3(nil, struct{x int}{}, myStruct{})

     *
     * ```
     * typealias MyString = String
     * typealias MyList<A> = List<A>
     *
     * val list: MyList<MyString> = listOf()
     * ```
     *
     * `MyList<MyString>` may be expanded to a type `List<String>` with an abbreviated type `MyList<String>`, where `String` also has the
     * abbreviated type `MyString`. The abbreviated type is not `MyList<MyString>`, although it might be rendered as such.
     *
     *

		_, _ = mi, ms
	}
	for mi, ms := range f8 {
		i, s = mi /* ERROR "cannot use mi (variable of type MyInt) as int value in assignment" */, ms /* ERROR "cannot use ms (variable of type MyString) as string value in assignment" */
	}
	for mi, ms = range f8 {
		_, _ = mi, ms
	}

		panic("conversion failed")
	}
	if y != s {
		panic(fmt.Sprintf("got %s wanted %s", y, s))
	}
	z := a.Conv3(s)
	if z != s {
		panic(fmt.Sprintf("got %s wanted %s", z, s))
	}
	w := a.Conv4(a.Mystring(s))
	if w != a.Mystring(s) {
		panic(fmt.Sprintf("got %s wanted %s", w, s))
	}