regexp

Data
import "regexp"

Implements regular expression search with RE2 syntax for safe, efficient pattern matching.

Example

package main

import (
    "fmt"
    "regexp"
)

func main() {
    re := regexp.MustCompile(`\d+`)
    fmt.Println(re.FindAllString("abc 123 def 456", -1))
}

Key Types & Functions

RegexpMustCompileCompileFindStringMatchStringReplaceAllString

About regexp

The regexp package (imported as regexp) belongs to the Data category of Go packages. Implements regular expression search with RE2 syntax for safe, efficient pattern matching.

Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The regexp package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.

When using regexp in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.

Related Packages

stringsbytesfmt