covProfileAlreadyEmitted bool
)

// fileType is used to select between counter-data files and
// meta-data files.
type fileType int

const (
	noFile = 1 << iota
	metaDataFile
	counterDataFile
)

// emitMetaData emits the meta-data output file for this coverage run.
// This entry point is intended to be invoked by the compiler from

	"cmd/compile/internal/syntax"
	"fmt"
	"go/constant"
	. "internal/types/errors"
)

// An operandMode specifies the (addressing) mode of an operand.
type operandMode byte

const (
	invalid   operandMode = iota // operand is invalid
	novalue                      // operand represents no value (result of a function call w/o result)
	builtin                      // operand is a built-in function

	Run:  run,
}

// 'kind' is a kind of assembly variable.
// The kinds 1, 2, 4, 8 stand for values of that size.
type asmKind int

// These special kinds are not valid sizes.
const (
	asmString asmKind = 100 + iota
	asmSlice
	asmArray
	asmInterface
	asmEmptyInterface
	asmStruct
	asmComplex
)

// An asmArch describes assembly parameters for an architecture
type asmArch struct {
	name      string
	bigEndian bool

// ending a given tag are *below* it on the stack, which is
// more work but forced on us by XML.
type stack struct {
	next *stack
	kind int
	name Name
	ok   bool
}

const (
	stkStart = iota
	stkNs
	stkEOF
)

func (d *Decoder) push(kind int) *stack {
	s := d.free
	if s != nil {
		d.free = s.next
	} else {
		s = new(stack)
	}
	s.next = d.stk
	s.kind = kind

}

// newFileKind describes the kind of file to newFile.
type newFileKind int

const (
	// kindNewFile means that the descriptor was passed to us via NewFile.
	kindNewFile newFileKind = iota
	// kindOpenFile means that the descriptor was opened using
	// Open, Create, or OpenFile.
	kindOpenFile
	// kindPipe means that the descriptor was opened using Pipe.
	kindPipe

	freg   int     // FP register index, used if kind == abiStepFloatReg
}

// abiStepKind is the "op-code" for an abiStep instruction.
type abiStepKind int

const (
	abiStepBad      abiStepKind = iota
	abiStepStack                // copy to/from stack
	abiStepIntReg               // copy to/from integer register
	abiStepPointer              // copy pointer to/from integer register

	val unsafe.Pointer // ptr to data (SendDir) or ptr to receive buffer (RecvDir)
}

// These values must match ../reflect/value.go:/SelectDir.
type selectDir int

const (
	_             selectDir = iota
	selectSend              // case Chan <- Send
	selectRecv              // case <-Chan:
	selectDefault           // default
)

//go:linkname reflect_rselect reflect.rselect

	hostLookupFiles:    "files",
	hostLookupDNS:      "dns",
}

func (o hostLookupOrder) String() string {
	if s, ok := lookupOrderName[o]; ok {
		return s
	}
	return "hostLookupOrder=" + itoa.Itoa(int(o)) + "??"
}

func (r *Resolver) goLookupHostOrder(ctx context.Context, name string, order hostLookupOrder, conf *dnsConfig) (addrs []string, err error) {
	if order == hostLookupFilesDNS || order == hostLookupFiles {

// Mode values control the operation of [New] and [NewFromFiles].
type Mode int

const (
	// AllDecls says to extract documentation for all package-level
	// declarations, not just exported ones.
	AllDecls Mode = 1 << iota

	// AllMethods says to show all embedded methods, not just the ones of
	// invisible (unexported) anonymous fields.
	AllMethods

	// PreserveAST says to leave the AST unmodified. Originally, pieces of

	"io"
	"unicode"
	"unicode/utf8"
)

// The mode flags below control which comments are reported
// by calling the error handler. If no flag is set, comments
// are ignored.
const (
	comments   uint = 1 << iota // call handler for all comments
	directives                  // call handler for directives only
)

type scanner struct {
	source
	mode   uint
	nlsemi bool // if set '\n' and EOF translate to ';'