kleingrep/regex/example_test.go

package regex_test

import (
	"fmt"

	"gitea.twomorecents.org/Rockingcool/kleingrep/regex"
)

func ExampleReg_Find() {
	regexStr := "b|a"
	regexComp := regex.MustCompile(regexStr)

	match, _ := regexComp.Find("banana")
	fmt.Println(match.String())

	// Output: 0	1
}

func ExampleReg_FindAll() {
	regexStr := "b|a"
	regexComp := regex.MustCompile(regexStr)

	matches := regexComp.FindAll("banana")
	for _, group := range matches {
		fmt.Println(group.String())
	}

	// Output: 0	1
	// 1	2
	// 3	4
	// 5	6
}

func ExampleReg_FindString() {
	regexStr := `\d+`
	regexComp := regex.MustCompile(regexStr)

	matchStr := regexComp.FindString("The year of our lord, 2025")
	fmt.Println(matchStr)
	// Output: 2025
}

func ExampleReg_FindSubmatch() {
	regexStr := `(\d)\.(\d)(\d)`
	regexComp := regex.MustCompile(regexStr)

	match, _ := regexComp.FindSubmatch("3.14")
	fmt.Println(match[0])
	fmt.Println(match[1])
	fmt.Println(match[2])
	// Output: 0	4
	// 0	1
	// 2	3
}

func ExampleReg_Expand() {
	inputStr := `option1: value1
	option2: value2`
	regexStr := `(\w+): (\w+)`
	templateStr := "$1 = $2\n"
	regexComp := regex.MustCompile(regexStr, regex.RE_MULTILINE)
	result := ""
	for _, submatches := range regexComp.FindAllSubmatch(inputStr) {
		result = regexComp.Expand(result, templateStr, inputStr, submatches)
	}
	fmt.Println(result)
	// Output: option1 = value1
	// option2 = value2

}

func ExampleReg_LiteralPrefix() {
	regexStr := `a(b|c)d*`
	regexComp := regex.MustCompile(regexStr)
	prefix, complete := regexComp.LiteralPrefix()
	fmt.Println(prefix)
	fmt.Println(complete)
	// Output: a
	// false
}

func ExampleReg_Longest() {
	regexStr := `x|xx`
	inputStr := "xx"
	regexComp := regex.MustCompile(regexStr)
	fmt.Println(regexComp.FindString(inputStr))
	regexComp.Longest()
	fmt.Println(regexComp.FindString(inputStr))
	// Output: x
	// xx
}