type traceExperiment uint8

const (
	// traceNoExperiment indicates no experiment.
	traceNoExperiment traceExperiment = iota

	// traceExperimentAllocFree is an experiment to add alloc/free events to the trace.
	traceExperimentAllocFree
)

// Experimental events.
const (
	_ traceEv = 127 + iota

	// Experimental events for ExperimentAllocFree.

	// Experimental heap span events. IDs map reversibly to base addresses.

const (
	NSNAME = 8
	NSYM   = 50
	NREG   = 32 // number of general registers
	NFREG  = 32 // number of floating point registers
)

const (
	REG_R0 = obj.RBaseLOONG64 + iota // must be a multiple of 32
	REG_R1
	REG_R2
	REG_R3
	REG_R4
	REG_R5
	REG_R6
	REG_R7
	REG_R8
	REG_R9
	REG_R10
	REG_R11
	REG_R12
	REG_R13
	REG_R14
	REG_R15
	REG_R16
	REG_R17

type SchedReqs struct {
	Thread    Constraint
	Proc      Constraint
	Goroutine Constraint
}

// Constraint represents a various presence requirements.
type Constraint uint8

const (
	MustNotHave Constraint = iota
	MayHave
	MustHave
)

// UserGoReqs is a common requirement among events that are running
// or are close to running user code.

func (check *Checker) constDecl(obj *Const, typ, init syntax.Expr, inherited bool) {
	assert(obj.typ == nil)

	// use the correct value of iota and errpos
	defer func(iota constant.Value, errpos syntax.Pos) {
		check.iota = iota
		check.errpos = errpos
	}(check.iota, check.errpos)
	check.iota = obj.val
	check.errpos = nopos

	// provide valid constant value under all circumstances
	obj.val = constant.MakeUnknown()

// and panic indicators, and the runtime, which turns them into more meaningful strings
// For best code generation, RF_DONE and RF_READY should be 0 and 1.
const (
	RF_DONE          = RF_State(iota) // body of loop has exited in a non-panic way
	RF_READY                          // body of loop has not exited yet, is not running  -- this is not a panic index

	dir  ChanDir
	elem Type
}

// A ChanDir value indicates a channel direction.
type ChanDir int

// The direction of a channel is indicated by one of these constants.
const (
	SendRecv ChanDir = iota
	SendOnly
	RecvOnly
)

// NewChan returns a new channel type for the given direction and element type.
func NewChan(dir ChanDir, elem Type) *Chan {
	return &Chan{dir: dir, elem: elem}
}

package language

// This file contains code common to the maketables.go and the package code.

// AliasType is the type of an alias in AliasMap.
type AliasType int8

const (
	Deprecated AliasType = iota
	Macro
	Legacy

	AliasTypeUnknown AliasType = -1

type Value struct {
	kind   ValueKind
	scalar uint64
}

// ValueKind is the type of a dynamically-typed value from a trace.
type ValueKind uint8

const (
	ValueBad ValueKind = iota
	ValueUint64
)

// Kind returns the ValueKind of the value.
//
// It represents the underlying structure of the value.
//
// New ValueKinds may be added in the future. Users of this type must be robust

//
// The Data fields contains object-specific data:
//
//	Kind    Data type         Data value
//	Pkg     *Scope            package scope
//	Con     int               iota for the respective declaration
//
// Deprecated: The relationship between Idents and Objects cannot be
// correctly computed without type information. For example, the

}

func (check *Checker) constDecl(obj *Const, typ, init ast.Expr, inherited bool) {
	assert(obj.typ == nil)

	// use the correct value of iota
	defer func(iota constant.Value, errpos positioner) {
		check.iota = iota
		check.errpos = errpos
	}(check.iota, check.errpos)
	check.iota = obj.val
	check.errpos = nil

	// provide valid constant value under all circumstances
	obj.val = constant.MakeUnknown()