// GoState represents the state of a goroutine.
//
// New GoStates may be added in the future. Users of this type must be robust
// to that possibility.
type GoState uint8

const (
	GoUndetermined GoState = iota // No information is known about the goroutine.
	GoNotExist                    // Goroutine does not exist.
	GoRunnable                    // Goroutine is runnable but not running.

	"crypto/elliptic"
	"crypto/internal/boring/fipstls"
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509/pkix"
	"fmt"
	"math/big"
	"strings"
	"testing"
	"time"
)

const (
	boringCertCA = iota
	boringCertLeaf
	boringCertFIPSOK = 0x80
)

func boringRSAKey(t *testing.T, size int) *rsa.PrivateKey {
	k, err := rsa.GenerateKey(rand.Reader, size)
	if err != nil {
		t.Fatal(err)
	}
	return k
}

	sema  uint32
}

// A Locker represents an object that can be locked and unlocked.
type Locker interface {
	Lock()
	Unlock()
}

const (
	mutexLocked = 1 << iota // mutex is locked
	mutexWoken
	mutexStarving
	mutexWaiterShift = iota

	// Mutex fairness.
	//
	// Mutex can be in 2 modes of operations: normal and starvation.
	// In normal mode waiters are queued in FIFO order, but a woken up waiter

package syntax

import (
	"fmt"
	"io"
	"os"
)

// Mode describes the parser mode.
type Mode uint

// Modes supported by the parser.
const (
	CheckBranches Mode = 1 << iota // check correct use of labels, break, continue, and goto statements
)

// Error describes a syntax error. Error implements the error interface.
type Error struct {
	Pos Pos
	Msg string
}

//
// TODO(rsc): Give idiomatic Go names.
//
//go:generate stringer -type=SymKind
const (
	// An otherwise invalid zero value for the type
	Sxxx SymKind = iota
	// Executable instructions
	STEXT
	// Read only static data
	SRODATA
	// Static data that does not contain any pointers
	SNOPTRDATA
	// Static data
	SDATA
	// Statically data that is initially all 0s
	SBSS

type ScanToken rune

const (
	// Asm defines some two-character lexemes. We make up
	// a rune/ScanToken value for them - ugly but simple.
	LSH          ScanToken = -1000 - iota // << Left shift.
	RSH                                   // >> Logical right shift.
	ARR                                   // -> Used on ARM for shift type 3, arithmetic right shift.

)

type expr struct {
	node
	typeAndValue // After typechecking, contains the results of typechecking this expression.
}

func (*expr) aExpr() {}

type ChanDir uint

const (
	_ ChanDir = iota
	SendOnly
	RecvOnly
)

// ----------------------------------------------------------------------------
// Statements

type (
	Stmt interface {
		Node
		aStmt()
	}

	// These are the same on Linux, BSD, and OS X.
	LOG_EMERG Priority = iota
	LOG_ALERT
	LOG_CRIT
	LOG_ERR
	LOG_WARNING
	LOG_NOTICE
	LOG_INFO
	LOG_DEBUG
)

const (
	// Facility.

	// From /usr/include/sys/syslog.h.
	// These are the same up to LOG_FTP on Linux, BSD, and OS X.
	LOG_KERN Priority = iota << 3
	LOG_USER
	LOG_MAIL
	LOG_DAEMON
	LOG_AUTH
	LOG_SYSLOG
	LOG_LPR

// with merging of counter data for a given function.

import (
	"fmt"
	"internal/coverage"
	"math"
)

type ModeMergePolicy uint8

const (
	ModeMergeStrict ModeMergePolicy = iota
	ModeMergeRelaxed
)

// Merger provides state and methods to help manage the process of
// merging together coverage counter data for a given function, for

	//
	// Deprecated: New code should avoid depending on Sym.Def. Add
	// mdempsky@ as a reviewer for any CLs involving Sym.Def.
	Def Object

	flags bitset8
}

const (
	symOnExportList = 1 << iota // added to exportlist (no need to add again)
	symUniq
	symSiggen // type symbol has been generated
	symAsm    // on asmlist, for writing to -asmhdr
	symFunc   // function symbol
)