func (f *File) saveRef(n *ast.Expr, context astContext) {
	sel := (*n).(*ast.SelectorExpr)
	// For now, assume that the only instance of capital C is when
	// used as the imported package identifier.
	// The parser should take care of scoping in the future, so
	// that we will be able to distinguish a "top-level C" from a
	// local C.
	if l, ok := sel.X.(*ast.Ident); !ok || l.Name != "C" {
		return
	}
	if context == ctxAssign2 {

		return
	}

	// bail if file is not zip
	if err == ErrFormat {
		return
	}

	// bail here if no Files expected to be tested
	// (there may actually be files in the zip, but we don't care)
	if zt.File == nil {
		return
	}

	if z.Comment != zt.Comment {
		t.Errorf("comment=%q, want %q", z.Comment, zt.Comment)
	}
	if len(z.File) != len(zt.File) {

const (
	// Type '0' indicates a regular file.
	TypeReg = '0'

	// Deprecated: Use TypeReg instead.
	TypeRegA = '\x00'

	// Type '1' to '6' are header-only flags and may not have a data body.
	TypeLink    = '1' // Hard link
	TypeSymlink = '2' // Symbolic link
	TypeChar    = '3' // Character device node
	TypeBlock   = '4' // Block device node
	TypeDir     = '5' // Directory
	TypeFifo    = '6' // FIFO node

	// Type '7' is reserved.

		// Ignore warnings and random comments, with one
		// exception: newer GCC versions will sometimes emit
		// an error on a macro #define with a note referring
		// to where the expansion occurs. We care about where
		// the expansion occurs, so in that case treat the note
		// as an error.
		isError := strings.Contains(line, ": error:")
		isErrorNote := strings.Contains(line, ": note:") && sawUnmatchedErrors

	LDORLH	R5, (RSP), R7                        // e7336578
	LDORLB	R5, (R6), R7                         // c7306538
	LDORLB	R5, (RSP), R7                        // e7336538
	CASD	R1, (R2), ZR                         // 5f7ca1c8
	CASW	R1, (RSP), ZR                        // ff7fa188
	CASB	ZR, (R5), R3                         // a37cbf08
	CASH	R3, (RSP), ZR                        // ff7fa348

in an assembly source file within the math/rand package implementation,
the package's Int function can be referred to as <code>·Int</code>.
This convention avoids the need to hard-code a package's import path in its
own source code, making it easier to move the code from one location to another.
</p>

<h3 id="directives">Directives</h3>

<p>

</pre>

<!--
These conversions also apply to type parameters with suitable core types.
Determine if we can simply use core type instead of underlying type here,
of if the general conversion rules take care of this.
-->

<p>
A <code>Pointer</code> is a <a href="#Pointer_types">pointer type</a> but a <code>Pointer</code>
value may not be <a href="#Address_operators">dereferenced</a>.

	//	#define A #define B(x) x
	// and
	//	#define A #define B (x) x
	// The first definition of B has an argument, the second doesn't. Because we let
	// text/scanner strip the blanks for us, this is extremely rare, hard to fix, and not worth it.
	return s.pos
}

func (s *Slice) Close() {

}

var listCache sync.Map // map[string]listImports, keyed by contextName

// listSem is a semaphore restricting concurrent invocations of 'go list'. 'go
// list' has its own internal concurrency, so we use a hard-coded constant (to
// allow the I/O-intensive phases of 'go list' to overlap) instead of scaling
// all the way up to GOMAXPROCS.
var listSem = make(chan semToken, 2)

type semToken struct{}

			Name:     "sticky.txt",
			Mode:     0600 | c_ISVTX,
			Size:     7,
			ModTime:  time.Unix(1360602540, 0),
			Typeflag: TypeReg,
		},
		fm: 0600 | fs.ModeSticky,
	}, {
		// hard link.
		h: &Header{
			Name:     "hard.txt",
			Mode:     0644,
			Size:     0,
			Linkname: "file.txt",
			ModTime:  time.Unix(1360600916, 0),
			Typeflag: TypeLink,
		},
		fm: 0644,
	}, {
		// More information.