package runtime

import (
	"internal/abi"
	"internal/goarch"
	"runtime/internal/math"
	"runtime/internal/sys"
	"unsafe"
)

type slice struct {
	array unsafe.Pointer
	len   int
	cap   int
}

// A notInHeapSlice is a slice backed by runtime/internal/sys.NotInHeap memory.
type notInHeapSlice struct {
	array *notInHeap
	len   int
	cap   int
}

func panicmakeslicelen() {

// Source: ../../cmd/compile/internal/types2/slice.go

// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package types

// A Slice represents a slice type.
type Slice struct {
	elem Type
}

// NewSlice returns a new slice type for the given element type.
func NewSlice(elem Type) *Slice { return &Slice{elem: elem} }

		x[1][2][3]. Each indexed item must be a map, slice, or array.
	slice
		slice returns the result of slicing its first argument by the
		remaining arguments. Thus "slice x 1 2" is, in Go syntax, x[1:2],
		while "slice x" is x[:], "slice x 1" is x[1:], and "slice x 1 2 3"
		is x[1:2:3]. The first argument must be a string, slice, or array.
	js
		Returns the escaped JavaScript equivalent of the textual

// slice.
//
// Swapper panics if the provided interface is not a slice.
func Swapper(slice any) func(i, j int) {
	v := ValueOf(slice)
	if v.Kind() != Slice {
		panic(&ValueError{Method: "Swapper", Kind: v.Kind()})
	}
	// Fast path for slices of size 0 and 1. Nothing to swap.
	switch v.Len() {
	case 0:
		return func(i, j int) { panic("reflect: slice index out of range") }
	case 1:

		prec = f.prec
	}
	// Format number, reserving space for leading + sign if needed.
	num := strconv.AppendFloat(f.intbuf[:1], v, byte(verb), prec, size)
	if num[1] == '-' || num[1] == '+' {
		num = num[1:]
	} else {
		num[0] = '+'
	}
	// f.space means to add a leading space instead of a "+" sign unless
	// the sign is explicitly asked for by f.plus.
	if f.space && num[0] == '+' && !f.plus {
		num[0] = ' '
	}

// slice.
//
// Swapper panics if the provided interface is not a slice.
func Swapper(slice any) func(i, j int) {
	v := ValueOf(slice)
	if v.Kind() != Slice {
		panic(&ValueError{Method: "Swapper", Kind: v.Kind()})
	}
	// Fast path for slices of size 0 and 1. Nothing to swap.
	switch v.Len() {
	case 0:
		return func(i, j int) { panic("reflect: slice index out of range") }
	case 1:

	}
	i := efaceOf(&sl)
	typ := i._type
	if typ.Kind_&abi.KindMask != abi.Pointer {
		panic("slice result of non-ptr type")
	}
	typ = (*ptrtype)(unsafe.Pointer(typ)).Elem
	if typ.Kind_&abi.KindMask != abi.Slice {
		panic("slice of non-ptr-to-slice type")
	}
	typ = (*slicetype)(unsafe.Pointer(typ)).Elem
	// t is now the element type of the slice we want to allocate.

	%X	upper-case hexadecimal notation, e.g. -0X1.23ABCP+20

String and slice of bytes (treated equivalently with these verbs):

	%s	the uninterpreted bytes of the string or slice
	%q	a double-quoted string safely escaped with Go syntax
	%x	base 16, lower-case, two characters per byte
	%X	base 16, upper-case, two characters per byte

Slice:

	%p	address of 0th element in base 16 notation, with leading 0x

Pointer:

	indentedIn bool
	putNewline bool
	attrNS     map[string]string // map prefix -> name space
	attrPrefix map[string]string // map name space -> prefix
	prefixes   []string
	tags       []Name
	closed     bool
	err        error
}

// createAttrPrefix finds the name space prefix attribute to use for the given name space,
// defining a new prefix if necessary. It returns the prefix.

// extendSlice returns a new slice value with the length
// incremented by the number of specified elements.
func (v Value) extendSlice(n int) Value {
	v.mustBeExported()
	v.mustBe(Slice)

	// Shallow copy the slice header to avoid mutating the source slice.
	sh := *(*unsafeheader.Slice)(v.ptr)
	s := &sh
	v.ptr = unsafe.Pointer(s)
	v.flag = flagIndir | flag(Slice) // equivalent flag to MakeSlice