Test golang strings.ToUpper with UTF-8 strings

str_to_upper.go

package main

import "fmt"
import "strings"

// go run str_to_upper.go
// Compare with C++: https://gist.github.com/siberex/7684eadde46d5e119b3bc4c6d5ab6212
func main() {
	strTestUpper1 := "hello🌍world"
	strTestUpper2 := "naïve café"
	strTestUpper3 := "αβγδε"                 // Greek
	strTestUpper4 := "привет мир"            // Cyrillic
	strTestUpper5 := "MixeD_CaSe1_ÄÖÜ #üñö!" // Mixed latin
	strTestUpper6 := "Straße"                // German with ß, should be capitalized as ẞ
	strTestUpper7 := "æon+早安øӕ"              // Mixed with ligatures U+00E6, U+04D5

	fmt.Printf("Generic string: %q → %q\n", strTestUpper1, strings.ToUpper(strTestUpper1))
	fmt.Printf("Latin diacritics: %q → %q\n", strTestUpper2, strings.ToUpper(strTestUpper2))
	fmt.Printf("Greek: %q → %q\n", strTestUpper3, strings.ToUpper(strTestUpper3))
	fmt.Printf("Cyrillic: %q → %q\n", strTestUpper4, strings.ToUpper(strTestUpper4))
	fmt.Printf("Mixed: %q → %q\n", strTestUpper5, strings.ToUpper(strTestUpper5))
	fmt.Printf("German: %q → %q\n", strTestUpper6, strings.ToUpper(strTestUpper6))
	fmt.Printf("Ligatures mixed: %q → %q\n", strTestUpper7, strings.ToUpper(strTestUpper7))
}