}

func (s *gcSizes) Alignof(T Type) (result int64) {
	defer func() {
		assert(result >= 1)
	}()

	// For arrays and structs, alignment is defined in terms
	// of alignment of the elements and fields, respectively.
	switch t := under(T).(type) {
	case *Array:
		// spec: "For a variable x of array type: unsafe.Alignof(x)
		// is the same as unsafe.Alignof(x[0]), but at least 1."
		return s.Alignof(t.elem)

}

// stdSizes is used if Config.Sizes == nil.
var stdSizes = SizesFor("gc", "amd64")

func (conf *Config) alignof(T Type) int64 {
	f := stdSizes.Alignof
	if conf.Sizes != nil {
		f = conf.Sizes.Alignof
	}
	if a := f(T); a >= 1 {
		return a
	}
	panic("implementation of alignof returned an alignment < 1")
}

func (conf *Config) offsetsof(T *Struct) []int64 {
	var offsets []int64

}

func (s *gcSizes) Alignof(T Type) (result int64) {
	defer func() {
		assert(result >= 1)
	}()

	// For arrays and structs, alignment is defined in terms
	// of alignment of the elements and fields, respectively.
	switch t := under(T).(type) {
	case *Array:
		// spec: "For a variable x of array type: unsafe.Alignof(x)
		// is the same as unsafe.Alignof(x[0]), but at least 1."
		return s.Alignof(t.elem)

}

// stdSizes is used if Config.Sizes == nil.
var stdSizes = SizesFor("gc", "amd64")

func (conf *Config) alignof(T Type) int64 {
	f := stdSizes.Alignof
	if conf.Sizes != nil {
		f = conf.Sizes.Alignof
	}
	if a := f(T); a >= 1 {
		return a
	}
	panic("implementation of alignof returned an alignment < 1")
}

func (conf *Config) offsetsof(T *Struct) []int64 {
	var offsets []int64

	assert(pp == 8)
	const ll = unsafe.Alignof(l)
	assert(ll == 8)
	const ff = unsafe.Alignof(f)
	assert(ff == 8)
	const ii = unsafe.Alignof(i)
	assert(ii == 8)
	const cc = unsafe.Alignof(c)
	assert(cc == 8)
	const mm = unsafe.Alignof(m)
	assert(mm == 8)
	const _ = unsafe /* ERROR "not constant" */ .Alignof(t)
}

// unsafe.Offsetof

func _[T comparable]() {
	var (

// Their contents must be kept in sync with their definitions.
// Because the host and target type sizes can differ, the compiler and
// linker cannot use the host information that they might get from
// either unsafe.Sizeof and Alignof, nor runtime, reflect, or reflectlite.

// CommonSize returns sizeof(Type) for a compilation target with a given ptrSize
func CommonSize(ptrSize int) int { return 4*ptrSize + 8 + 8 }

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

package p

import "unsafe"

func _[T any](x T) {
	_ = unsafe.Alignof(x)
	_ = unsafe.Sizeof(x)

// license that can be found in the LICENSE file.

// Issue 7525: self-referential array types.

package main

import "unsafe"

var x struct { // GC_ERROR "initialization cycle: x refers to itself"
	c [unsafe.Alignof(x.c)]int // GCCGO_ERROR "array bound|typechecking loop|invalid array"

	}

	if tab.baseList[0] != nil || tab.indexMap[nil] != 0 {
		t.Errorf("nil base not at index 0")
	}
}

func TestSize(t *testing.T) {
	var p XPos
	if unsafe.Alignof(p) != 4 {
		t.Errorf("alignment = %v; want 4", unsafe.Alignof(p))
	}
	if unsafe.Sizeof(p) != 8 {
		t.Errorf("size = %v; want 8", unsafe.Sizeof(p))
	}
}

func TestSetBase(t *testing.T) {
	var tab PosTable
	b1 := NewFileBase("b1", "b1")

package main

import "unsafe"

func F[G int](g G) (uintptr, uintptr, uintptr) {
	var c chan func() int
	type s struct {
		g G
		x []int
	}
	return unsafe.Sizeof(s{g, make([]int, (<-c)())}),
		unsafe.Alignof(s{g, make([]int, (<-c)())}),
		unsafe.Offsetof(s{g, make([]int, (<-c)())}.x)
}

func main() {
	F(0)