)

type Blog struct {
	ID         uint   `gorm:"primary_key"`
	Locale     string `gorm:"primary_key"`
	Subject    string
	Body       string
	Tags       []Tag `gorm:"many2many:blog_tags;"`
	SharedTags []Tag `gorm:"many2many:shared_blog_tags;ForeignKey:id;References:id"`
	LocaleTags []Tag `gorm:"many2many:locale_blog_tags;ForeignKey:id,locale;References:id"`
}

type Tag struct {
	ID     uint   `gorm:"primary_key"`

	C.mpz_tdiv_r(&z.i[0], &x.i[0], &y.i[0])
	return z
}

// Lsh sets z = x << s and returns z.
func (z *Int) Lsh(x *Int, s uint) *Int {
	x.doinit()
	z.doinit()
	C._mpz_mul_2exp(&z.i[0], &x.i[0], C.ulong(s))
	return z
}

// Rsh sets z = x >> s and returns z.
func (z *Int) Rsh(x *Int, s uint) *Int {
	x.doinit()
	z.doinit()
	C._mpz_div_2exp(&z.i[0], &x.i[0], C.ulong(s))
	return z
}

package jstream

import (
	"io"
	"sync/atomic"
)

const (
	chunk    = 4095 // ~4k
	maxUint  = ^uint(0)
	maxInt   = int64(maxUint >> 1)
	nullByte = byte(0)
)

type scanner struct {
	pos       int64 // position in reader
	ipos      int64 // internal buffer position
	ifill     int64 // internal buffer fill
	end       int64
	buf       [chunk + 1]byte // internal buffer (with a lookback size of 1)

	"gorm.io/gorm/clause"
)

type Person struct {
	ID        int
	Name      string
	Addresses []Address `gorm:"many2many:person_addresses;"`
	DeletedAt gorm.DeletedAt
}

type Address struct {
	ID   uint
	Name string
}

type PersonAddress struct {
	PersonID  int
	AddressID int
	CreatedAt time.Time
	DeletedAt gorm.DeletedAt
}

func TestOverrideJoinTable(t *testing.T) {

	tidbSkip(t, "not support the foreign key feature")

	type City struct {
		gorm.Model
		Name string `gorm:"unique"`
	}

	type Museum struct {
		gorm.Model
		Name   string `gorm:"unique"`
		CityID uint
		City   City `gorm:"Constraint:OnUpdate:CASCADE,OnDelete:CASCADE;FOREIGNKEY:CityID;References:ID"`
	}

	db, err := OpenTestConnection(&gorm.Config{TranslateError: true})
	if err != nil {

// https://www.awsarchitectureblog.com/2015/03/backoff.html
func exponentialBackoffWait(r *rand.Rand, unit, cap time.Duration) func(uint) time.Duration {
	if unit > time.Hour {
		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(attempt uint) time.Duration {
		if attempt > 16 {
			// Protect against integer overflow
			attempt = 16
		}

	}

	loopCount := 100
	var wg sync.WaitGroup
	var unexpectedError bool
	writerFinish := make(chan struct{})

	wg.Add(1)
	go func(id uint) {
		defer wg.Done()
		defer close(writerFinish)

		for j := 0; j < loopCount; j++ {
			var tmp User
			err := tx.Session(&gorm.Session{}).First(&tmp, id).Error
			if err == nil || isUsingClosedConnError(err) {

	}

	stmt2 := dryRunDB.Find(&user, "id = ?", user.ID).Statement
	if stmt2.SQL.String() == "" || len(stmt2.Vars) != 1 {
		t.Errorf("Failed to generate sql, got %v", stmt2.SQL.String())
	}
}

type ageInt int8

func (ageInt) String() string {
	return "age"
}

type ageBool bool

func (ageBool) String() string {
	return "age"
}

type ageUint64 uint64

func (ageUint64) String() string {

// that the first byte can only be either 0x80 or 0xff. Thus, the first byte is
// equivalent to the sign bit in two's complement form.
func fitsInBase256(n int, x int64) bool {
	binBits := uint(n-1) * 8
	return n >= 9 || (x >= -1<<binBits && x < 1<<binBits)
}

// parseNumeric parses the input as being encoded in either base-256 or octal.
// This function may return negative numbers.

	p.start(operand)
	addr := obj.Addr{}
	p.operand(&addr)
	return addr
}

// parseScale converts a decimal string into a valid scale factor.
func (p *Parser) parseScale(s string) int8 {
	switch s {
	case "1", "2", "4", "8":
		return int8(s[0] - '0')
	}
	p.errorf("bad scale: %s", s)
	return 0
}

// operand parses a general operand and stores the result in *a.
func (p *Parser) operand(a *obj.Addr) {