//
// Deprecated: use the type checker [go/types] instead; see [Object].
type Scope struct {
	Outer   *Scope
	Objects map[string]*Object
}

// NewScope creates a new scope nested in the outer scope.
func NewScope(outer *Scope) *Scope {
	const n = 4 // initial scope capacity
	return &Scope{outer, make(map[string]*Object, n)}
}

// Lookup returns the object with the given name if it is

// previously supplied to NewCoverageDataWriter. Returns an error
// if something went wrong somewhere with the write.
func (cfw *CoverageDataWriter) Write(metaFileHash [16]byte, args map[string]string, visitor CounterVisitor) error {
	if err := cfw.writeHeader(metaFileHash); err != nil {
		return err
	}
	return cfw.AppendSegment(args, visitor)
}

// NOTE: Adapted from go/types/infer.go. If it is later exported, factor.
type Free struct {
	seen map[types.Type]bool
}

// Has reports whether the specified type has a free type parameter.
func (w *Free) Has(typ types.Type) (res bool) {

	// detect cycles
	if x, ok := w.seen[typ]; ok {
		return x
	}
	if w.seen == nil {
		w.seen = make(map[types.Type]bool)
	}
	w.seen[typ] = false
	defer func() {
		w.seen[typ] = res
	}()

	err = checkMediaTypeDisposition(mediatype)
	if err != nil {
		return "", nil, err
	}

	params = make(map[string]string)

	// Map of base parameter name -> parameter name -> value
	// for parameters containing a '*' character.
	// Lazily initialized.
	var continuation map[string]map[string]string

	v = v[len(base):]
	for len(v) > 0 {
		v = strings.TrimLeftFunc(v, unicode.IsSpace)
		if len(v) == 0 {

	buf          decBuffer                               // buffer for more efficient i/o from r
	wireType     map[typeId]*wireType                    // map from remote ID to local description
	decoderCache map[reflect.Type]map[typeId]**decEngine // cache of compiled engines
	ignorerCache map[typeId]**decEngine                  // ditto for ignored objects

	switch compiler {
	case "gc":
		return &gcimports{
			fset:     fset,
			packages: make(map[string]*types.Package),
			lookup:   lookup,
		}

	case "gccgo":
		var inst gccgoimporter.GccgoInstallation
		if err := inst.InitFromDriver("gccgo"); err != nil {
			return nil
		}
		return &gccgoimports{
			packages: make(map[string]*types.Package),
			importer: inst.GetImporter(nil, nil),
			lookup:   lookup,
		}

	"errors"
	"fmt"
	"internal/buildcfg"
	"internal/platform"
	"internal/testenv"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"runtime/debug"
	"strings"
	"sync"
)

func scriptConditions() map[string]script.Cond {
	conds := scripttest.DefaultConds()

	add := func(name string, cond script.Cond) {
		if _, ok := conds[name]; ok {
			panic(fmt.Sprintf("condition %q is already registered", name))
		}

}

func None[T any]() Option[T] {
	return Option[T]{}
}

func Ap[T, U any](t Option[Func1[T, U]], a Option[T]) Option[U] {
	return FlatMap(t, func(f Func1[T, U]) Option[U] {
		return Map(a, f)
	})
}

func Map[T, U any](opt Option[T], f func(v T) U) Option[U] {
	return FlatMap(opt, func(v T) Option[U] {
		return Some(f(v))
	})
}

func FlatMap[T, U any](opt Option[T], fn func(v T) Option[U]) Option[U] {

	t.Parallel()
	goBin := testenv.GoToolPath(t)
	out, err := testenv.Command(t, goBin, "tool", "nm", goBin).CombinedOutput()
	if err != nil {
		t.Fatalf("go tool nm: %v: %s", err, out)
	}
	wantSym := map[string]bool{
		// Verify these exist: (sanity checking this test)
		"net/http.(*Client).do":           true,
		"net/http.(*Transport).RoundTrip": true,

		// Verify these don't exist:

	if err != nil {
		// pprof expects a map entry, so fake one, when we haven't added anything yet.
		b.addMappingEntry(0, 0, 0, "", "", true)
		return
	}
	defer func() { _ = syscall.CloseHandle(snap) }()

	var module windows.ModuleEntry32
	module.Size = uint32(windows.SizeofModuleEntry32)
	err = windows.Module32First(snap, &module)
	if err != nil {
		// pprof expects a map entry, so fake one, when we haven't added anything yet.