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},

	} else {
		regexp.prefix, regexp.prefixComplete, regexp.prefixEnd = onePassPrefix(prog)
	}
	if regexp.prefix != "" {
		// TODO(rsc): Remove this allocation by adding
		// IndexString to package bytes.
		regexp.prefixBytes = []byte(regexp.prefix)
		regexp.prefixRune, _ = utf8.DecodeRuneInString(regexp.prefix)
	}

	n := len(prog.Inst)
	i := 0
	for matchSize[i] != 0 && matchSize[i] < n {
		i++
	}

package syntax

// Note to implementers:
// In this package, re is always a *Regexp and r is always a rune.

import (
	"slices"
	"strconv"
	"strings"
	"unicode"
)

// A Regexp is a node in a regular expression syntax tree.
type Regexp struct {
	Op       Op // operator
	Flags    Flags
	Sub      []*Regexp  // subexpressions, if any
	Sub0     [1]*Regexp // storage for short Sub

// 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

	fmt.Println(matched, err)
	matched, err = regexp.MatchString(`bar.*`, "seafood")
	fmt.Println(matched, err)
	matched, err = regexp.MatchString(`a(b`, "seafood")
	fmt.Println(matched, err)
	// Output:
	// true <nil>
	// false <nil>
	// false error parsing regexp: missing closing ): `a(b`
}

func ExampleQuoteMeta() {
	fmt.Println(regexp.QuoteMeta(`Escaping symbols like: .+*?()|[]{}^$`))

}

// 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

	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) + "=(.*)")

	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)
			}
		}

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, "|"))
	}()
)