// in the form of "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}".
func (guid GUID) String() string {
	var str [100]uint16
	chars := stringFromGUID2(&guid, &str[0], int32(len(str)))
	if chars <= 1 {
		return ""
	}
	return string(utf16.Decode(str[:chars-1]))
}

// KnownFolderPath returns a well-known folder path for the current user, specified by one of

		}
	}
	return -1
}

func TestIndexRandom(t *testing.T) {
	const chars = "abcdefghijklmnopqrstuvwxyz0123456789"
	for times := 0; times < 10; times++ {
		for strLen := 5 + rand.Intn(5); strLen < 140; strLen += 10 { // Arbitrary
			s1 := make([]byte, strLen)
			for i := range s1 {
				s1[i] = chars[rand.Intn(len(chars))]
			}
			s := string(s1)
			for i := 0; i < 50; i++ {
				begin := rand.Intn(len(s) + 1)

			// allows for separators between all digits.
			const limit = 10000
			if len(e.Value) > limit {
				check.errorf(e, InvalidConstVal, "excessively long constant: %s... (%d chars)", e.Value[:10], len(e.Value))
				goto Error
			}
		}
		x.setConst(e.Kind, e.Value)
		if x.mode == invalid {
			// The parser already establishes syntactic correctness.

		}
	})
	if allocs != 0 {
		t.Errorf("expected no allocations, got %f", allocs)
	}
}

func runIndexAnyTests(t *testing.T, f func(s []byte, chars string) int, funcName string, testCases []BinOpTest) {
	for _, test := range testCases {
		a := []byte(test.a)
		actual := f(a, test.b)
		if actual != test.i {

			// allows for separators between all digits.
			const limit = 10000
			if len(e.Value) > limit {
				check.errorf(e, InvalidConstVal, "excessively long constant: %s... (%d chars)", e.Value[:10], len(e.Value))
				goto Error
			}
		}
		x.setConst(e.Kind, e.Value)
		if x.mode == invalid {
			// The parser already establishes syntactic correctness.

			i++
		}
		tag = tag[i:]
		if tag == "" {
			break
		}

		// Scan to colon. A space, a quote or a control character is a syntax error.
		// Strictly speaking, control chars include the range [0x7f, 0x9f], not just
		// [0x00, 0x1f], but in practice, we ignore the multi-byte control characters
		// as it is simpler to inspect the tag's bytes than the tag's runes.
		i = 0

//		Data    uintptr // unused by runtime, available for function
//	}
//
// In C syntax, this struct will be
//
//	struct {
//		uintptr_t PC;
//		char*     File;
//		uintptr_t Lineno;
//		char*     Func;
//		uintptr_t Entry;
//		uintptr_t More;
//		uintptr_t Data;
//	};
//
// The PC field will be a value returned by a call to the traceback
// function.
//