name    string
	float   float64
	fmt     byte
	prec    int
	bitSize int
}{
	{"Decimal", 33909, 'g', -1, 64},
	{"Float", 339.7784, 'g', -1, 64},
	{"Exp", -5.09e75, 'g', -1, 64},
	{"NegExp", -5.11e-95, 'g', -1, 64},
	{"LongExp", 1.234567890123456e-78, 'g', -1, 64},

	{"Big", 123456789123456789123456789, 'g', -1, 64},
	{"BinaryExp", -1, 'b', -1, 64},

	{"32Integer", 33909, 'g', -1, 32},

// Package lazyregexp is a thin wrapper over regexp, allowing the use of global
// regexp variables without forcing them to be compiled at init.
package lazyregexp

import (
	"os"
	"regexp"
	"strings"
	"sync"
)

// Regexp is a wrapper around [regexp.Regexp], where the underlying regexp will be
// compiled the first time it is needed.
type Regexp struct {
	str  string
	once sync.Once
	rx   *regexp.Regexp

// Package lazyregexp is a thin wrapper over regexp, allowing the use of global
// regexp variables without forcing them to be compiled at init.
package lazyregexp

import (
	"os"
	"regexp"
	"strings"
	"sync"
)

// Regexp is a wrapper around regexp.Regexp, where the underlying regexp will be
// compiled the first time it is needed.
type Regexp struct {
	str  string
	once sync.Once
	rx   *regexp.Regexp

}

// Takes a list of strings and compiles them into a list of regular expressions
func compileRegexps(regexpStrings []string) ([]*regexp.Regexp, error) {
	regexps := []*regexp.Regexp{}
	for _, regexpStr := range regexpStrings {
		r, err := regexp.Compile(regexpStr)
		if err != nil {
			return []*regexp.Regexp{}, err
		}
		regexps = append(regexps, r)
	}
	return regexps, nil

	var keep, drop *regexp.Regexp
	var err error

	if p.DropFrames != "" {
		if drop, err = regexp.Compile("^(" + p.DropFrames + ")$"); err != nil {
			return fmt.Errorf("failed to compile regexp %s: %v", p.DropFrames, err)
		}
		if p.KeepFrames != "" {
			if keep, err = regexp.Compile("^(" + p.KeepFrames + ")$"); err != nil {
				return fmt.Errorf("failed to compile regexp %s: %v", p.KeepFrames, err)
			}
		}

	hostFieldRegex           = regexp.MustCompile(string(HostField) + "=(.*)")
	hostnameFieldRegex       = regexp.MustCompile(string(HostnameField) + "=(.*)")
	requestHeaderFieldRegex  = regexp.MustCompile(string(RequestHeaderField) + "=(.*)")
	responseHeaderFieldRegex = regexp.MustCompile(string(ResponseHeaderField) + "=(.*)")
	URLFieldRegex            = regexp.MustCompile(string(URLField) + "=(.*)")

package profile

import (
	"fmt"
	"regexp"
	"strings"
)

var (
	reservedNames = []string{"(anonymous namespace)", "operator()"}
	bracketRx     = func() *regexp.Regexp {
		var quotedNames []string
		for _, name := range append(reservedNames, "(") {
			quotedNames = append(quotedNames, regexp.QuoteMeta(name))
		}
		return regexp.MustCompile(strings.Join(quotedNames, "|"))
	}()
)

[short] skip

go test -short -coverpkg=strings strings regexp
! stdout '[^0-9]0\.0%'
stdout  'strings.*coverage:.*[1-9][0-9.]+%'
stdout  'regexp.*coverage:.*[1-9][0-9.]+%'

go test -short -cover strings math regexp
! stdout '[^0-9]0\.0%'
stdout  'strings.*coverage:.*[1-9][0-9.]+%'
stdout  'math.*coverage:.*[1-9][0-9.]+%'

			WantException:  false,
		},
		{ // case 4
			Args:           strings.Split("envoy --browser=false", " "),
			ExpectedRegexp: regexp.MustCompile(".*Error: specify a pod or --selector"),
			WantException:  true,
		},
		{ // case 5
			Args:           strings.Split("envoy --browser=false pod-123456-7890", " "),
			ExpectedRegexp: regexp.MustCompile("http://localhost:3456"),
			WantException:  false,

// for /(x){1,2}/ is /(x)(x)?/ but both parentheses capture as $1.
// The returned regexp may share structure with or be the original.
func (re *Regexp) Simplify() *Regexp {
	if re == nil {
		return nil
	}
	switch re.Op {
	case OpCapture, OpConcat, OpAlternate:
		// Simplify children, building new Regexp if children change.
		nre := re
		for i, sub := range re.Sub {
			nsub := sub.Simplify()