Initial commit: Go 1.23 release state

test/stringrange.go

@@ -0,0 +1,71 @@
+// run
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test range over strings.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"unicode/utf8"
+)
+
+func main() {
+	s := "\000\123\x00\xca\xFE\u0123\ubabe\U0000babe\U0010FFFFx"
+	expect := []rune{0, 0123, 0, 0xFFFD, 0xFFFD, 0x123, 0xbabe, 0xbabe, 0x10FFFF, 'x'}
+	offset := 0
+	var i int
+	var c rune
+	ok := true
+	cnum := 0
+	for i, c = range s {
+		r, size := utf8.DecodeRuneInString(s[i:len(s)]) // check it another way
+		if i != offset {
+			fmt.Printf("unexpected offset %d not %d\n", i, offset)
+			ok = false
+		}
+		if r != expect[cnum] {
+			fmt.Printf("unexpected rune %d from DecodeRuneInString: %x not %x\n", i, r, expect[cnum])
+			ok = false
+		}
+		if c != expect[cnum] {
+			fmt.Printf("unexpected rune %d from range: %x not %x\n", i, r, expect[cnum])
+			ok = false
+		}
+		offset += size
+		cnum++
+	}
+	if i != len(s)-1 {
+		fmt.Println("after loop i is", i, "not", len(s)-1)
+		ok = false
+	}
+
+	i = 12345
+	c = 23456
+	for i, c = range "" {
+	}
+	if i != 12345 {
+		fmt.Println("range empty string assigned to index:", i)
+		ok = false
+	}
+	if c != 23456 {
+		fmt.Println("range empty string assigned to value:", c)
+		ok = false
+	}
+
+	for _, c := range "a\xed\xa0\x80a" {
+		if c != 'a' && c != utf8.RuneError {
+			fmt.Printf("surrogate UTF-8 does not error: %U\n", c)
+			ok = false
+		}
+	}
+
+	if !ok {
+		fmt.Println("BUG: stringrange")
+		os.Exit(1)
+	}
+}