Merge pull request #13489 from Luap99/k8s

move k8s deps into podman

1 files changed, 0 insertions, 665 deletions

diff --git a/vendor/github.com/google/go-cmp/cmp/compare.go b/vendor/github.com/google/go-cmp/cmp/compare.go
deleted file mode 100644
index 2a5446762..000000000
--- a/vendor/github.com/google/go-cmp/cmp/compare.go
+++ /dev/null
@@ -1,665 +0,0 @@
-// Copyright 2017, The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package cmp determines equality of values.
-//
-// This package is intended to be a more powerful and safer alternative to
-// reflect.DeepEqual for comparing whether two values are semantically equal.
-// It is intended to only be used in tests, as performance is not a goal and
-// it may panic if it cannot compare the values. Its propensity towards
-// panicking means that its unsuitable for production environments where a
-// spurious panic may be fatal.
-//
-// The primary features of cmp are:
-//
-// • When the default behavior of equality does not suit the needs of the test,
-// custom equality functions can override the equality operation.
-// For example, an equality function may report floats as equal so long as they
-// are within some tolerance of each other.
-//
-// • Types that have an Equal method may use that method to determine equality.
-// This allows package authors to determine the equality operation for the types
-// that they define.
-//
-// • If no custom equality functions are used and no Equal method is defined,
-// equality is determined by recursively comparing the primitive kinds on both
-// values, much like reflect.DeepEqual. Unlike reflect.DeepEqual, unexported
-// fields are not compared by default; they result in panics unless suppressed
-// by using an Ignore option (see cmpopts.IgnoreUnexported) or explicitly
-// compared using the Exporter option.
-package cmp
-
-import (
-	"fmt"
-	"reflect"
-	"strings"
-
-	"github.com/google/go-cmp/cmp/internal/diff"
-	"github.com/google/go-cmp/cmp/internal/function"
-	"github.com/google/go-cmp/cmp/internal/value"
-)
-
-// Equal reports whether x and y are equal by recursively applying the
-// following rules in the given order to x and y and all of their sub-values:
-//
-// • Let S be the set of all Ignore, Transformer, and Comparer options that
-// remain after applying all path filters, value filters, and type filters.
-// If at least one Ignore exists in S, then the comparison is ignored.
-// If the number of Transformer and Comparer options in S is greater than one,
-// then Equal panics because it is ambiguous which option to use.
-// If S contains a single Transformer, then use that to transform the current
-// values and recursively call Equal on the output values.
-// If S contains a single Comparer, then use that to compare the current values.
-// Otherwise, evaluation proceeds to the next rule.
-//
-// • If the values have an Equal method of the form "(T) Equal(T) bool" or
-// "(T) Equal(I) bool" where T is assignable to I, then use the result of
-// x.Equal(y) even if x or y is nil. Otherwise, no such method exists and
-// evaluation proceeds to the next rule.
-//
-// • Lastly, try to compare x and y based on their basic kinds.
-// Simple kinds like booleans, integers, floats, complex numbers, strings, and
-// channels are compared using the equivalent of the == operator in Go.
-// Functions are only equal if they are both nil, otherwise they are unequal.
-//
-// Structs are equal if recursively calling Equal on all fields report equal.
-// If a struct contains unexported fields, Equal panics unless an Ignore option
-// (e.g., cmpopts.IgnoreUnexported) ignores that field or the Exporter option
-// explicitly permits comparing the unexported field.
-//
-// Slices are equal if they are both nil or both non-nil, where recursively
-// calling Equal on all non-ignored slice or array elements report equal.
-// Empty non-nil slices and nil slices are not equal; to equate empty slices,
-// consider using cmpopts.EquateEmpty.
-//
-// Maps are equal if they are both nil or both non-nil, where recursively
-// calling Equal on all non-ignored map entries report equal.
-// Map keys are equal according to the == operator.
-// To use custom comparisons for map keys, consider using cmpopts.SortMaps.
-// Empty non-nil maps and nil maps are not equal; to equate empty maps,
-// consider using cmpopts.EquateEmpty.
-//
-// Pointers and interfaces are equal if they are both nil or both non-nil,
-// where they have the same underlying concrete type and recursively
-// calling Equal on the underlying values reports equal.
-//
-// Before recursing into a pointer, slice element, or map, the current path
-// is checked to detect whether the address has already been visited.
-// If there is a cycle, then the pointed at values are considered equal
-// only if both addresses were previously visited in the same path step.
-func Equal(x, y interface{}, opts ...Option) bool {
-	s := newState(opts)
-	s.compareAny(rootStep(x, y))
-	return s.result.Equal()
-}
-
-// Diff returns a human-readable report of the differences between two values:
-// y - x. It returns an empty string if and only if Equal returns true for the
-// same input values and options.
-//
-// The output is displayed as a literal in pseudo-Go syntax.
-// At the start of each line, a "-" prefix indicates an element removed from x,
-// a "+" prefix to indicates an element added from y, and the lack of a prefix
-// indicates an element common to both x and y. If possible, the output
-// uses fmt.Stringer.String or error.Error methods to produce more humanly
-// readable outputs. In such cases, the string is prefixed with either an
-// 's' or 'e' character, respectively, to indicate that the method was called.
-//
-// Do not depend on this output being stable. If you need the ability to
-// programmatically interpret the difference, consider using a custom Reporter.
-func Diff(x, y interface{}, opts ...Option) string {
-	s := newState(opts)
-
-	// Optimization: If there are no other reporters, we can optimize for the
-	// common case where the result is equal (and thus no reported difference).
-	// This avoids the expensive construction of a difference tree.
-	if len(s.reporters) == 0 {
-		s.compareAny(rootStep(x, y))
-		if s.result.Equal() {
-			return ""
-		}
-		s.result = diff.Result{} // Reset results
-	}
-
-	r := new(defaultReporter)
-	s.reporters = append(s.reporters, reporter{r})
-	s.compareAny(rootStep(x, y))
-	d := r.String()
-	if (d == "") != s.result.Equal() {
-		panic("inconsistent difference and equality results")
-	}
-	return d
-}
-
-// rootStep constructs the first path step. If x and y have differing types,
-// then they are stored within an empty interface type.
-func rootStep(x, y interface{}) PathStep {
-	vx := reflect.ValueOf(x)
-	vy := reflect.ValueOf(y)
-
-	// If the inputs are different types, auto-wrap them in an empty interface
-	// so that they have the same parent type.
-	var t reflect.Type
-	if !vx.IsValid() || !vy.IsValid() || vx.Type() != vy.Type() {
-		t = reflect.TypeOf((*interface{})(nil)).Elem()
-		if vx.IsValid() {
-			vvx := reflect.New(t).Elem()
-			vvx.Set(vx)
-			vx = vvx
-		}
-		if vy.IsValid() {
-			vvy := reflect.New(t).Elem()
-			vvy.Set(vy)
-			vy = vvy
-		}
-	} else {
-		t = vx.Type()
-	}
-
-	return &pathStep{t, vx, vy}
-}
-
-type state struct {
-	// These fields represent the "comparison state".
-	// Calling statelessCompare must not result in observable changes to these.
-	result    diff.Result // The current result of comparison
-	curPath   Path        // The current path in the value tree
-	curPtrs   pointerPath // The current set of visited pointers
-	reporters []reporter  // Optional reporters
-
-	// recChecker checks for infinite cycles applying the same set of
-	// transformers upon the output of itself.
-	recChecker recChecker
-
-	// dynChecker triggers pseudo-random checks for option correctness.
-	// It is safe for statelessCompare to mutate this value.
-	dynChecker dynChecker
-
-	// These fields, once set by processOption, will not change.
-	exporters []exporter // List of exporters for structs with unexported fields
-	opts      Options    // List of all fundamental and filter options
-}
-
-func newState(opts []Option) *state {
-	// Always ensure a validator option exists to validate the inputs.
-	s := &state{opts: Options{validator{}}}
-	s.curPtrs.Init()
-	s.processOption(Options(opts))
-	return s
-}
-
-func (s *state) processOption(opt Option) {
-	switch opt := opt.(type) {
-	case nil:
-	case Options:
-		for _, o := range opt {
-			s.processOption(o)
-		}
-	case coreOption:
-		type filtered interface {
-			isFiltered() bool
-		}
-		if fopt, ok := opt.(filtered); ok && !fopt.isFiltered() {
-			panic(fmt.Sprintf("cannot use an unfiltered option: %v", opt))
-		}
-		s.opts = append(s.opts, opt)
-	case exporter:
-		s.exporters = append(s.exporters, opt)
-	case reporter:
-		s.reporters = append(s.reporters, opt)
-	default:
-		panic(fmt.Sprintf("unknown option %T", opt))
-	}
-}
-
-// statelessCompare compares two values and returns the result.
-// This function is stateless in that it does not alter the current result,
-// or output to any registered reporters.
-func (s *state) statelessCompare(step PathStep) diff.Result {
-	// We do not save and restore curPath and curPtrs because all of the
-	// compareX methods should properly push and pop from them.
-	// It is an implementation bug if the contents of the paths differ from
-	// when calling this function to when returning from it.
-
-	oldResult, oldReporters := s.result, s.reporters
-	s.result = diff.Result{} // Reset result
-	s.reporters = nil        // Remove reporters to avoid spurious printouts
-	s.compareAny(step)
-	res := s.result
-	s.result, s.reporters = oldResult, oldReporters
-	return res
-}
-
-func (s *state) compareAny(step PathStep) {
-	// Update the path stack.
-	s.curPath.push(step)
-	defer s.curPath.pop()
-	for _, r := range s.reporters {
-		r.PushStep(step)
-		defer r.PopStep()
-	}
-	s.recChecker.Check(s.curPath)
-
-	// Cycle-detection for slice elements (see NOTE in compareSlice).
-	t := step.Type()
-	vx, vy := step.Values()
-	if si, ok := step.(SliceIndex); ok && si.isSlice && vx.IsValid() && vy.IsValid() {
-		px, py := vx.Addr(), vy.Addr()
-		if eq, visited := s.curPtrs.Push(px, py); visited {
-			s.report(eq, reportByCycle)
-			return
-		}
-		defer s.curPtrs.Pop(px, py)
-	}
-
-	// Rule 1: Check whether an option applies on this node in the value tree.
-	if s.tryOptions(t, vx, vy) {
-		return
-	}
-
-	// Rule 2: Check whether the type has a valid Equal method.
-	if s.tryMethod(t, vx, vy) {
-		return
-	}
-
-	// Rule 3: Compare based on the underlying kind.
-	switch t.Kind() {
-	case reflect.Bool:
-		s.report(vx.Bool() == vy.Bool(), 0)
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		s.report(vx.Int() == vy.Int(), 0)
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		s.report(vx.Uint() == vy.Uint(), 0)
-	case reflect.Float32, reflect.Float64:
-		s.report(vx.Float() == vy.Float(), 0)
-	case reflect.Complex64, reflect.Complex128:
-		s.report(vx.Complex() == vy.Complex(), 0)
-	case reflect.String:
-		s.report(vx.String() == vy.String(), 0)
-	case reflect.Chan, reflect.UnsafePointer:
-		s.report(vx.Pointer() == vy.Pointer(), 0)
-	case reflect.Func:
-		s.report(vx.IsNil() && vy.IsNil(), 0)
-	case reflect.Struct:
-		s.compareStruct(t, vx, vy)
-	case reflect.Slice, reflect.Array:
-		s.compareSlice(t, vx, vy)
-	case reflect.Map:
-		s.compareMap(t, vx, vy)
-	case reflect.Ptr:
-		s.comparePtr(t, vx, vy)
-	case reflect.Interface:
-		s.compareInterface(t, vx, vy)
-	default:
-		panic(fmt.Sprintf("%v kind not handled", t.Kind()))
-	}
-}
-
-func (s *state) tryOptions(t reflect.Type, vx, vy reflect.Value) bool {
-	// Evaluate all filters and apply the remaining options.
-	if opt := s.opts.filter(s, t, vx, vy); opt != nil {
-		opt.apply(s, vx, vy)
-		return true
-	}
-	return false
-}
-
-func (s *state) tryMethod(t reflect.Type, vx, vy reflect.Value) bool {
-	// Check if this type even has an Equal method.
-	m, ok := t.MethodByName("Equal")
-	if !ok || !function.IsType(m.Type, function.EqualAssignable) {
-		return false
-	}
-
-	eq := s.callTTBFunc(m.Func, vx, vy)
-	s.report(eq, reportByMethod)
-	return true
-}
-
-func (s *state) callTRFunc(f, v reflect.Value, step Transform) reflect.Value {
-	if !s.dynChecker.Next() {
-		return f.Call([]reflect.Value{v})[0]
-	}
-
-	// Run the function twice and ensure that we get the same results back.
-	// We run in goroutines so that the race detector (if enabled) can detect
-	// unsafe mutations to the input.
-	c := make(chan reflect.Value)
-	go detectRaces(c, f, v)
-	got := <-c
-	want := f.Call([]reflect.Value{v})[0]
-	if step.vx, step.vy = got, want; !s.statelessCompare(step).Equal() {
-		// To avoid false-positives with non-reflexive equality operations,
-		// we sanity check whether a value is equal to itself.
-		if step.vx, step.vy = want, want; !s.statelessCompare(step).Equal() {
-			return want
-		}
-		panic(fmt.Sprintf("non-deterministic function detected: %s", function.NameOf(f)))
-	}
-	return want
-}
-
-func (s *state) callTTBFunc(f, x, y reflect.Value) bool {
-	if !s.dynChecker.Next() {
-		return f.Call([]reflect.Value{x, y})[0].Bool()
-	}
-
-	// Swapping the input arguments is sufficient to check that
-	// f is symmetric and deterministic.
-	// We run in goroutines so that the race detector (if enabled) can detect
-	// unsafe mutations to the input.
-	c := make(chan reflect.Value)
-	go detectRaces(c, f, y, x)
-	got := <-c
-	want := f.Call([]reflect.Value{x, y})[0].Bool()
-	if !got.IsValid() || got.Bool() != want {
-		panic(fmt.Sprintf("non-deterministic or non-symmetric function detected: %s", function.NameOf(f)))
-	}
-	return want
-}
-
-func detectRaces(c chan<- reflect.Value, f reflect.Value, vs ...reflect.Value) {
-	var ret reflect.Value
-	defer func() {
-		recover() // Ignore panics, let the other call to f panic instead
-		c <- ret
-	}()
-	ret = f.Call(vs)[0]
-}
-
-func (s *state) compareStruct(t reflect.Type, vx, vy reflect.Value) {
-	var addr bool
-	var vax, vay reflect.Value // Addressable versions of vx and vy
-
-	var mayForce, mayForceInit bool
-	step := StructField{&structField{}}
-	for i := 0; i < t.NumField(); i++ {
-		step.typ = t.Field(i).Type
-		step.vx = vx.Field(i)
-		step.vy = vy.Field(i)
-		step.name = t.Field(i).Name
-		step.idx = i
-		step.unexported = !isExported(step.name)
-		if step.unexported {
-			if step.name == "_" {
-				continue
-			}
-			// Defer checking of unexported fields until later to give an
-			// Ignore a chance to ignore the field.
-			if !vax.IsValid() || !vay.IsValid() {
-				// For retrieveUnexportedField to work, the parent struct must
-				// be addressable. Create a new copy of the values if
-				// necessary to make them addressable.
-				addr = vx.CanAddr() || vy.CanAddr()
-				vax = makeAddressable(vx)
-				vay = makeAddressable(vy)
-			}
-			if !mayForceInit {
-				for _, xf := range s.exporters {
-					mayForce = mayForce || xf(t)
-				}
-				mayForceInit = true
-			}
-			step.mayForce = mayForce
-			step.paddr = addr
-			step.pvx = vax
-			step.pvy = vay
-			step.field = t.Field(i)
-		}
-		s.compareAny(step)
-	}
-}
-
-func (s *state) compareSlice(t reflect.Type, vx, vy reflect.Value) {
-	isSlice := t.Kind() == reflect.Slice
-	if isSlice && (vx.IsNil() || vy.IsNil()) {
-		s.report(vx.IsNil() && vy.IsNil(), 0)
-		return
-	}
-
-	// NOTE: It is incorrect to call curPtrs.Push on the slice header pointer
-	// since slices represents a list of pointers, rather than a single pointer.
-	// The pointer checking logic must be handled on a per-element basis
-	// in compareAny.
-	//
-	// A slice header (see reflect.SliceHeader) in Go is a tuple of a starting
-	// pointer P, a length N, and a capacity C. Supposing each slice element has
-	// a memory size of M, then the slice is equivalent to the list of pointers:
-	//	[P+i*M for i in range(N)]
-	//
-	// For example, v[:0] and v[:1] are slices with the same starting pointer,
-	// but they are clearly different values. Using the slice pointer alone
-	// violates the assumption that equal pointers implies equal values.
-
-	step := SliceIndex{&sliceIndex{pathStep: pathStep{typ: t.Elem()}, isSlice: isSlice}}
-	withIndexes := func(ix, iy int) SliceIndex {
-		if ix >= 0 {
-			step.vx, step.xkey = vx.Index(ix), ix
-		} else {
-			step.vx, step.xkey = reflect.Value{}, -1
-		}
-		if iy >= 0 {
-			step.vy, step.ykey = vy.Index(iy), iy
-		} else {
-			step.vy, step.ykey = reflect.Value{}, -1
-		}
-		return step
-	}
-
-	// Ignore options are able to ignore missing elements in a slice.
-	// However, detecting these reliably requires an optimal differencing
-	// algorithm, for which diff.Difference is not.
-	//
-	// Instead, we first iterate through both slices to detect which elements
-	// would be ignored if standing alone. The index of non-discarded elements
-	// are stored in a separate slice, which diffing is then performed on.
-	var indexesX, indexesY []int
-	var ignoredX, ignoredY []bool
-	for ix := 0; ix < vx.Len(); ix++ {
-		ignored := s.statelessCompare(withIndexes(ix, -1)).NumDiff == 0
-		if !ignored {
-			indexesX = append(indexesX, ix)
-		}
-		ignoredX = append(ignoredX, ignored)
-	}
-	for iy := 0; iy < vy.Len(); iy++ {
-		ignored := s.statelessCompare(withIndexes(-1, iy)).NumDiff == 0
-		if !ignored {
-			indexesY = append(indexesY, iy)
-		}
-		ignoredY = append(ignoredY, ignored)
-	}
-
-	// Compute an edit-script for slices vx and vy (excluding ignored elements).
-	edits := diff.Difference(len(indexesX), len(indexesY), func(ix, iy int) diff.Result {
-		return s.statelessCompare(withIndexes(indexesX[ix], indexesY[iy]))
-	})
-
-	// Replay the ignore-scripts and the edit-script.
-	var ix, iy int
-	for ix < vx.Len() || iy < vy.Len() {
-		var e diff.EditType
-		switch {
-		case ix < len(ignoredX) && ignoredX[ix]:
-			e = diff.UniqueX
-		case iy < len(ignoredY) && ignoredY[iy]:
-			e = diff.UniqueY
-		default:
-			e, edits = edits[0], edits[1:]
-		}
-		switch e {
-		case diff.UniqueX:
-			s.compareAny(withIndexes(ix, -1))
-			ix++
-		case diff.UniqueY:
-			s.compareAny(withIndexes(-1, iy))
-			iy++
-		default:
-			s.compareAny(withIndexes(ix, iy))
-			ix++
-			iy++
-		}
-	}
-}
-
-func (s *state) compareMap(t reflect.Type, vx, vy reflect.Value) {
-	if vx.IsNil() || vy.IsNil() {
-		s.report(vx.IsNil() && vy.IsNil(), 0)
-		return
-	}
-
-	// Cycle-detection for maps.
-	if eq, visited := s.curPtrs.Push(vx, vy); visited {
-		s.report(eq, reportByCycle)
-		return
-	}
-	defer s.curPtrs.Pop(vx, vy)
-
-	// We combine and sort the two map keys so that we can perform the
-	// comparisons in a deterministic order.
-	step := MapIndex{&mapIndex{pathStep: pathStep{typ: t.Elem()}}}
-	for _, k := range value.SortKeys(append(vx.MapKeys(), vy.MapKeys()...)) {
-		step.vx = vx.MapIndex(k)
-		step.vy = vy.MapIndex(k)
-		step.key = k
-		if !step.vx.IsValid() && !step.vy.IsValid() {
-			// It is possible for both vx and vy to be invalid if the
-			// key contained a NaN value in it.
-			//
-			// Even with the ability to retrieve NaN keys in Go 1.12,
-			// there still isn't a sensible way to compare the values since
-			// a NaN key may map to multiple unordered values.
-			// The most reasonable way to compare NaNs would be to compare the
-			// set of values. However, this is impossible to do efficiently
-			// since set equality is provably an O(n^2) operation given only
-			// an Equal function. If we had a Less function or Hash function,
-			// this could be done in O(n*log(n)) or O(n), respectively.
-			//
-			// Rather than adding complex logic to deal with NaNs, make it
-			// the user's responsibility to compare such obscure maps.
-			const help = "consider providing a Comparer to compare the map"
-			panic(fmt.Sprintf("%#v has map key with NaNs\n%s", s.curPath, help))
-		}
-		s.compareAny(step)
-	}
-}
-
-func (s *state) comparePtr(t reflect.Type, vx, vy reflect.Value) {
-	if vx.IsNil() || vy.IsNil() {
-		s.report(vx.IsNil() && vy.IsNil(), 0)
-		return
-	}
-
-	// Cycle-detection for pointers.
-	if eq, visited := s.curPtrs.Push(vx, vy); visited {
-		s.report(eq, reportByCycle)
-		return
-	}
-	defer s.curPtrs.Pop(vx, vy)
-
-	vx, vy = vx.Elem(), vy.Elem()
-	s.compareAny(Indirect{&indirect{pathStep{t.Elem(), vx, vy}}})
-}
-
-func (s *state) compareInterface(t reflect.Type, vx, vy reflect.Value) {
-	if vx.IsNil() || vy.IsNil() {
-		s.report(vx.IsNil() && vy.IsNil(), 0)
-		return
-	}
-	vx, vy = vx.Elem(), vy.Elem()
-	if vx.Type() != vy.Type() {
-		s.report(false, 0)
-		return
-	}
-	s.compareAny(TypeAssertion{&typeAssertion{pathStep{vx.Type(), vx, vy}}})
-}
-
-func (s *state) report(eq bool, rf resultFlags) {
-	if rf&reportByIgnore == 0 {
-		if eq {
-			s.result.NumSame++
-			rf |= reportEqual
-		} else {
-			s.result.NumDiff++
-			rf |= reportUnequal
-		}
-	}
-	for _, r := range s.reporters {
-		r.Report(Result{flags: rf})
-	}
-}
-
-// recChecker tracks the state needed to periodically perform checks that
-// user provided transformers are not stuck in an infinitely recursive cycle.
-type recChecker struct{ next int }
-
-// Check scans the Path for any recursive transformers and panics when any
-// recursive transformers are detected. Note that the presence of a
-// recursive Transformer does not necessarily imply an infinite cycle.
-// As such, this check only activates after some minimal number of path steps.
-func (rc *recChecker) Check(p Path) {
-	const minLen = 1 << 16
-	if rc.next == 0 {
-		rc.next = minLen
-	}
-	if len(p) < rc.next {
-		return
-	}
-	rc.next <<= 1
-
-	// Check whether the same transformer has appeared at least twice.
-	var ss []string
-	m := map[Option]int{}
-	for _, ps := range p {
-		if t, ok := ps.(Transform); ok {
-			t := t.Option()
-			if m[t] == 1 { // Transformer was used exactly once before
-				tf := t.(*transformer).fnc.Type()
-				ss = append(ss, fmt.Sprintf("%v: %v => %v", t, tf.In(0), tf.Out(0)))
-			}
-			m[t]++
-		}
-	}
-	if len(ss) > 0 {
-		const warning = "recursive set of Transformers detected"
-		const help = "consider using cmpopts.AcyclicTransformer"
-		set := strings.Join(ss, "\n\t")
-		panic(fmt.Sprintf("%s:\n\t%s\n%s", warning, set, help))
-	}
-}
-
-// dynChecker tracks the state needed to periodically perform checks that
-// user provided functions are symmetric and deterministic.
-// The zero value is safe for immediate use.
-type dynChecker struct{ curr, next int }
-
-// Next increments the state and reports whether a check should be performed.
-//
-// Checks occur every Nth function call, where N is a triangular number:
-//	0 1 3 6 10 15 21 28 36 45 55 66 78 91 105 120 136 153 171 190 ...
-// See https://en.wikipedia.org/wiki/Triangular_number
-//
-// This sequence ensures that the cost of checks drops significantly as
-// the number of functions calls grows larger.
-func (dc *dynChecker) Next() bool {
-	ok := dc.curr == dc.next
-	if ok {
-		dc.curr = 0
-		dc.next++
-	}
-	dc.curr++
-	return ok
-}
-
-// makeAddressable returns a value that is always addressable.
-// It returns the input verbatim if it is already addressable,
-// otherwise it creates a new value and returns an addressable copy.
-func makeAddressable(v reflect.Value) reflect.Value {
-	if v.CanAddr() {
-		return v
-	}
-	vc := reflect.New(v.Type()).Elem()
-	vc.Set(v)
-	return vc
-}