-// $G $F.go && $L $F.$A && ./$A.out
+// 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 string literal syntax.
+
package main
import "os"
"backslashes 2 (backquote)")
assert("\\x\\u\\U\\", `\x\u\U\`, "backslash 3 (backquote)")
- // test large runes. perhaps not the most logical place for this test.
+ // test large and surrogate-half runes. perhaps not the most logical place for these tests.
var r int32
r = 0x10ffff // largest rune value
s = string(r)
r = 0x10ffff + 1
s = string(r)
assert(s, "\xef\xbf\xbd", "too-large rune")
+ r = 0xD800
+ s = string(r)
+ assert(s, "\xef\xbf\xbd", "surrogate rune min")
+ r = 0xDFFF
+ s = string(r)
+ assert(s, "\xef\xbf\xbd", "surrogate rune max")
+ r = -1
+ s = string(r)
+ assert(s, "\xef\xbf\xbd", "negative rune")
+
+ // the large rune tests again, this time using constants instead of a variable.
+ // these conversions will be done at compile time.
+ s = string(0x10ffff) // largest rune value
+ assert(s, "\xf4\x8f\xbf\xbf", "largest rune constant")
+ s = string(0x10ffff + 1)
+ assert(s, "\xef\xbf\xbd", "too-large rune constant")
+ s = string(0xD800)
+ assert(s, "\xef\xbf\xbd", "surrogate rune min constant")
+ s = string(0xDFFF)
+ assert(s, "\xef\xbf\xbd", "surrogate rune max constant")
+ s = string(-1)
+ assert(s, "\xef\xbf\xbd", "negative rune")
assert(string(gr1), gx1, "global ->[]rune")
assert(string(gr2), gx2fix, "global invalid ->[]rune")