testConstant(t, 64, MaxVarintLen64)
}

func testVarint(t *testing.T, x int64) {
	buf := make([]byte, MaxVarintLen64)
	n := PutVarint(buf, x)
	y, m := Varint(buf[0:n])
	if x != y {
		t.Errorf("Varint(%d): got %d", x, y)
	}
	if n != m {
		t.Errorf("Varint(%d): got n = %d; want %d", x, m, n)
	}

	buf2 := []byte("prefix")
	buf2 = AppendVarint(buf2, x)
	if string(buf2) != "prefix"+string(buf[:n]) {

//         }
//     }
//
//     Fingerprint [8]byte
//
// uvarint means a uint64 written out using uvarint encoding.
//
// []T means a uvarint followed by that many T objects. In other
// words:
//
//     Len   uvarint
//     Elems [Len]T
//
// stringOff means a uvarint that indicates an offset within the
// Strings section. At that offset is another uvarint, followed by
// that many bytes, which form the string value.
//

}

// AppendVarint appends the varint-encoded form of x,
// as generated by [PutVarint], to buf and returns the extended buffer.
func AppendVarint(buf []byte, x int64) []byte {
	ux := uint64(x) << 1
	if x < 0 {
		ux = ^ux
	}
	return AppendUvarint(buf, ux)
}

// PutVarint encodes an int64 into buf and returns the number of bytes written.
// If the buffer is too small, PutVarint will panic.

	}
	n := 1

	// Read timestamp diff.
	ts, nb := binary.Uvarint(b[n:])
	if nb <= 0 {
		return 0, 0, fmt.Errorf("found invalid uvarint for timestamp")
	}
	n += nb

	// Read the rest of the arguments.
	for i := 0; i < len(spec.Args)-1; i++ {
		arg, nb := binary.Uvarint(b[n:])
		if nb <= 0 {
			return 0, 0, fmt.Errorf("found invalid uvarint")
		}
		e.args[i] = arg
		n += nb
	}
	return n, timestamp(ts), nil

		{0x01},
		{0x02},
		{0x7f},
		{0x80, 0x01},
		{0xff, 0x01},
		{0x80, 0x02},
	}
	for _, b := range inputs {
		x, n := binary.Uvarint(b)
		if n != len(b) {
			fmt.Println("Uvarint did not consume all of in")
		}
		fmt.Println(x)
	}
	// Output:
	// 1
	// 2
	// 127
	// 128
	// 255
	// 256
}

func ExampleVarint() {
	inputs := [][]byte{
		{0x81, 0x01},
		{0x7f},

Field names refer to fields on RawPackage and rawFile.
The file uses little endian encoding for the uint32s.
Strings are written into the string table at the end of the file.
Each string is prefixed with a uvarint-encoded length.
Bools are written as uint32s: 0 for false and 1 for true.

The following is the format for a full module:

“go index v2\n”
str uint32 - offset of string table
n uint32 - number of packages

func (w *Writer) lit(x byte) {
	if w.nb == progMaxLiteral {
		w.flushlit()
	}
	w.b[w.nb] = x
	w.nb++
	w.index++
}

// varint emits the varint encoding of x.
func (w *Writer) varint(x int64) {
	if x < 0 {
		panic("gcprog: negative varint")
	}
	for x >= 0x80 {
		w.byte(byte(0x80 | x))
		x >>= 7
	}
	w.byte(byte(x))
}

// flushlit flushes any pending literal bits.

func writeInt(w io.Writer, buf []byte, x int) error {
	binary.PutVarint(buf, int64(x))
	_, err := w.Write(buf[0:binary.MaxVarintLen64])
	return err
}

// readInt reads an int x from r using buf to buffer the read and returns x.
func readInt(r io.Reader, buf []byte) (int64, error) {
	_, err := io.ReadFull(r, buf[0:binary.MaxVarintLen64]) // ok to continue with error
	x, _ := binary.Varint(buf)
	return x, err
}

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Declares that a property represents a variant dimension. Variants are used in dependency
 * resolution to discriminate between various binaries that may match the requirements (such
 * as a platform, a build type, ...).
 *

  compileTestVariantSwift -> linkTestVariant -> installTestVariant -> xcTestVariant [dir=back, style=dashed]
  compileTestVariantSwift[label=<compile<i>Variant</i>Swift>]
  linkTestVariant[label=<link<i>Variant</i>>]
  installTestVariant[label=<installTest<i>Variant</i>>]
  xcTestVariant[label=<xcTest<i>Variant</i>>]