To allow additional flags, set CGO_CFLAGS_ALLOW to a regular expression
matching the new flags. To disallow flags that would otherwise be allowed,
set CGO_CFLAGS_DISALLOW to a regular expression matching arguments
that must be disallowed. In both cases the regular expression must match
a full argument: to allow -mfoo=bar, use CGO_CFLAGS_ALLOW='-mfoo.*',

<p>
A <i>terminating statement</i> interrupts the regular flow of control in
a <a href="#Blocks">block</a>. The following statements are terminating:
</p>

<ol>
<li>
	A <a href="#Return_statements">"return"</a> or
    	<a href="#Goto_statements">"goto"</a> statement.
	<!-- ul below only for regular layout -->
	<ul> </ul>
</li>

<li>
	A call to the built-in function

		}
	}
	if len(ss) == 0 {
		return prefix
	}
	return fmt.Sprintf("%s: %v", prefix, strings.Join(ss, "; and "))
}

// Type flags for Header.Typeflag.
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

<p>
A <i>terminating statement</i> interrupts the regular flow of control in
a <a href="#Blocks">block</a>. The following statements are terminating:
</p>

<ol>
<li>
	A <a href="#Return_statements">"return"</a> or
    	<a href="#Goto_statements">"goto"</a> statement.
	<!-- ul below only for regular layout -->
	<ul> </ul>
</li>

<li>
	A call to the built-in function

		b.uint32(1)           // total number of disks

		if _, err := w.cw.Write(buf[:]); err != nil {
			return err
		}

		// store max values in the regular end record to signal
		// that the zip64 values should be used instead
		records = uint16max
		size = uint32max
		offset = uint32max
	}

	// write end record
	var buf [directoryEndLen]byte

				gnuLongLink = p.parseString(realname)
			}
			continue // This is a meta header affecting the next header
		default:
			// The old GNU sparse format is handled here since it is technically
			// just a regular file with additional attributes.

			if err := mergePAX(hdr, paxHdrs); err != nil {
				return nil, err
			}
			if gnuLongName != "" {
				hdr.Name = gnuLongName
			}
			if gnuLongLink != "" {

	}
}

type headerRoundTripTest struct {
	h  *Header
	fm fs.FileMode
}

func TestHeaderRoundTrip(t *testing.T) {
	vectors := []headerRoundTripTest{{
		// regular file.
		h: &Header{
			Name:     "test.txt",
			Mode:     0644,
			Size:     12,
			ModTime:  time.Unix(1360600916, 0),
			Typeflag: TypeReg,
		},
		fm: 0644,
	}, {
		// symbolic link.

}

func (w *Walker) emitFunc(f *types.Func) {
	sig := f.Type().(*types.Signature)
	if sig.Recv() != nil {
		panic("method considered a regular function: " + f.String())
	}
	if w.isDeprecated(f) {
		w.emitf("func %s //deprecated", f.Name())
	}
	w.emitf("func %s%s", f.Name(), w.signatureString(sig))
}