var b []uint16
		for _, c := range s {
			b = append(b, uint16(c))
			if c != rune(uint16(c)) {
				t.Errorf("bad test: stringW can't handle >16 bit runes")
			}
		}
		b = append(b, 0)
		r := runtime.GostringW(b)
		if r != s {
			t.Errorf("gostringW(%v) = %s, want %s", b, r, s)
		}
	}
}

func TestLargeStringConcat(t *testing.T) {
	output := runTestProg(t, "testprog", "stringconcat")

// This is exported via linkname to assembly in syscall (for Plan9) and cgo.
//
//go:linkname gostring
func gostring(p *byte) string {
	l := findnull(p)
	if l == 0 {
		return ""
	}
	s, b := rawstring(l)
	memmove(unsafe.Pointer(&b[0]), unsafe.Pointer(p), uintptr(l))
	return s
}

// internal_syscall_gostring is a version of gostring for internal/syscall/unix.
//

func MemclrBytes(b []byte) {
	s := (*slice)(unsafe.Pointer(&b))
	memclrNoHeapPointers(s.array, uintptr(s.len))
}

const HashLoad = hashLoad

// entry point for testing
func GostringW(w []uint16) (s string) {
	systemstack(func() {
		s = gostringw(&w[0])
	})
	return
}

var Open = open
var Close = closefd
var Read = read
var Write = write

func Envs() []string     { return envs }

		if p[i] == 0 {
			// empty string marks the end
			if i == from {
				break
			}
			from = i + 1
			n++
		}
	}
	envs = make([]string, n)

	for i := range envs {
		envs[i] = gostringw(&p[0])
		for p[0] != 0 {
			p = p[1:]
		}
		p = p[1:] // skip nil byte
	}

	stdcall1(_FreeEnvironmentStringsW, uintptr(strings))

C.sizeof_struct_stat.

A C function may be declared in the Go file with a parameter type of
the special name _GoString_. This function may be called with an
ordinary Go string value. The string length, and a pointer to the
string contents, may be accessed by calling the C functions

	size_t _GoStringLen(_GoString_ s);
	const char *_GoStringPtr(_GoString_ s);

These functions are only available in the preamble, not in other C

pkg debug/macho, method (RelocTypeARM) GoString() string
pkg debug/macho, method (RelocTypeARM) String() string
pkg debug/macho, method (RelocTypeARM64) GoString() string
pkg debug/macho, method (RelocTypeARM64) String() string
pkg debug/macho, method (RelocTypeGeneric) GoString() string
pkg debug/macho, method (RelocTypeGeneric) String() string
pkg debug/macho, method (RelocTypeX86_64) GoString() string

pkg debug/elf, const SHF_COMPRESSED = 2048
pkg debug/elf, const SHF_COMPRESSED SectionFlag
pkg debug/elf, method (CompressionType) GoString() string
pkg debug/elf, method (CompressionType) String() string
pkg debug/elf, method (R_MIPS) GoString() string
pkg debug/elf, method (R_MIPS) String() string
pkg debug/elf, type Chdr32 struct
pkg debug/elf, type Chdr32 struct, Addralign uint32

	}
}

// api

const greeting = "hello, world"

type testPair struct {
	Name      string
	Got, Want interface{}
}

var testPairs = []testPair{
	{"GoString", C.GoString(C.greeting), greeting},
	{"GoStringN", C.GoStringN(C.greeting, 5), greeting[:5]},
	{"GoBytes", C.GoBytes(unsafe.Pointer(C.greeting), 5), []byte(greeting[:5])},
}

func testHelpers(t *testing.T) {
	for _, pair := range testPairs {

// such as [Print].
type Stringer interface {
	String() string
}

// GoStringer is implemented by any value that has a GoString method,
// which defines the Go syntax for that value.
// The GoString method is used to print values passed as an operand
// to a %#v format.
type GoStringer interface {
	GoString() string
}

// FormatString returns a string representing the fully qualified formatting

        assertTrue(restriction.isLowerBoundInclusive(), CHECK_LOWER_BOUND_INCLUSIVE);
        assertEquals("1.4", restriction.getUpperBound().toString(), CHECK_UPPER_BOUND);
        assertTrue(restriction.isUpperBoundInclusive(), CHECK_UPPER_BOUND_INCLUSIVE);
        restriction = restrictions.get(2);
        assertEquals("1.5", restriction.getLowerBound().toString(), CHECK_LOWER_BOUND);