uint16max = (1 << 16) - 1
	uint32max = (1 << 32) - 1

	// Extra header IDs.
	//
	// IDs 0..31 are reserved for official use by PKWARE.
	// IDs above that range are defined by third-party vendors.
	// Since ZIP lacked high precision timestamps (nor an official specification
	// of the timezone used for the date fields), many competing extra fields
	// have been invented. Pervasive use effectively makes them "official".
	//

pkg debug/elf, const R_PPC64_ADDR16_HIGH = 110
pkg debug/elf, const R_PPC64_ADDR16_HIGH R_PPC64
pkg debug/elf, const R_PPC64_ADDR16_HIGHA = 111
pkg debug/elf, const R_PPC64_ADDR16_HIGHA R_PPC64
pkg debug/elf, const R_PPC64_ADDR64_LOCAL = 117
pkg debug/elf, const R_PPC64_ADDR64_LOCAL R_PPC64
pkg debug/elf, const R_PPC64_DTPREL16_HIGH = 114
pkg debug/elf, const R_PPC64_DTPREL16_HIGH R_PPC64

pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_GUARD_CF = 16384
pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_GUARD_CF ideal-int
pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA = 32
pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA ideal-int
pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_NO_BIND = 2048
pkg debug/pe, const IMAGE_DLLCHARACTERISTICS_NO_BIND ideal-int

pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_DEFAULT = 0
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_DEFAULT ideal-int
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_HIGH = 1
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_HIGH ideal-int
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE ideal-int
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_LOW = 2
pkg syscall (netbsd-arm64-cgo), const IP_PORTRANGE_LOW ideal-int

		switch r {
		case ' ', '\t', '\n', '\v', '\f', '\r':
			return true
		case '\u0085', '\u00A0':
			return true
		}
		return false
	}
	// High-valued ones.
	if '\u2000' <= r && r <= '\u200a' {
		return true
	}
	switch r {
	case '\u1680', '\u2028', '\u2029', '\u202f', '\u205f', '\u3000':
		return true
	}
	return false
}

Thus <code>-2</code> is not the integer value minus two,
but the unsigned 64-bit integer with the same bit pattern.
The distinction rarely matters but
to avoid ambiguity, division or right shift where the right operand's
high bit is set is rejected.
</p>

<h3 id="symbols">Symbols</h3>

<p>
Some symbols, such as <code>R1</code> or <code>LR</code>,
are predefined and refer to registers.
The exact set depends on the architecture.

index defaults to zero; a missing <code>high</code> index defaults to the length of the
sliced operand:
</p>

<pre>
a[2:]  // same as a[2 : len(a)]
a[:3]  // same as a[0 : 3]
a[:]   // same as a[0 : len(a)]
</pre>

<p>
If <code>a</code> is a pointer to an array, <code>a[low : high]</code> is shorthand for
<code>(*a)[low : high]</code>.
</p>

<p>

pkg syscall (darwin-arm64), const IPV6_PORTRANGE_DEFAULT = 0
pkg syscall (darwin-arm64), const IPV6_PORTRANGE_DEFAULT ideal-int
pkg syscall (darwin-arm64), const IPV6_PORTRANGE_HIGH = 1
pkg syscall (darwin-arm64), const IPV6_PORTRANGE_HIGH ideal-int
pkg syscall (darwin-arm64), const IPV6_PORTRANGE_LOW = 2
pkg syscall (darwin-arm64), const IPV6_PORTRANGE_LOW ideal-int
pkg syscall (darwin-arm64), const IPV6_RECVTCLASS = 35

pkg syscall (freebsd-arm64), const IP_PORTRANGE_DEFAULT = 0
pkg syscall (freebsd-arm64), const IP_PORTRANGE_DEFAULT ideal-int
pkg syscall (freebsd-arm64), const IP_PORTRANGE_HIGH = 1
pkg syscall (freebsd-arm64), const IP_PORTRANGE_HIGH ideal-int
pkg syscall (freebsd-arm64), const IP_PORTRANGE_LOW = 2
pkg syscall (freebsd-arm64), const IP_PORTRANGE_LOW ideal-int
pkg syscall (freebsd-arm64), const IP_RECVDSTADDR = 7

pkg debug/elf, const R_PPC64_PLTSEQ_NOTOC R_PPC64 #54345
pkg debug/elf, const R_PPC64_PLTSEQ R_PPC64 #54345
pkg debug/elf, const R_PPC64_REL16_HIGH = 240 #54345
pkg debug/elf, const R_PPC64_REL16_HIGHA = 241 #54345
pkg debug/elf, const R_PPC64_REL16_HIGHA R_PPC64 #54345
pkg debug/elf, const R_PPC64_REL16_HIGHER = 242 #54345
pkg debug/elf, const R_PPC64_REL16_HIGHER34 = 140 #54345