pkg syscall (netbsd-arm64-cgo), const O_APPEND = 8
pkg syscall (netbsd-arm64-cgo), const O_ASYNC = 64
pkg syscall (netbsd-arm64-cgo), const O_CLOEXEC = 4194304
pkg syscall (netbsd-arm64-cgo), const O_CREAT = 512
pkg syscall (netbsd-arm64-cgo), const OCRNL = 16
pkg syscall (netbsd-arm64-cgo), const OCRNL ideal-int
pkg syscall (netbsd-arm64-cgo), const O_DIRECT = 524288
pkg syscall (netbsd-arm64-cgo), const O_DIRECT ideal-int

pkg archive/zip, type FileHeader struct, UncompressedSize //deprecated
pkg compress/flate, type ReadError //deprecated
pkg compress/flate, type WriteError //deprecated
pkg crypto/rc4, method (*Cipher) Reset //deprecated
pkg crypto/tls, const VersionSSL30 //deprecated
pkg crypto/tls, method (*Config) BuildNameToCertificate //deprecated
pkg crypto/tls, type Config struct, NameToCertificate //deprecated

</pre>

<p>
In <a href="https://www.unicode.org/versions/Unicode8.0.0/">The Unicode Standard 8.0</a>,
Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo
as Unicode letters, and those in the Number category Nd as Unicode digits.
</p>

<h3 id="Letters_and_digits">Letters and digits</h3>

<p>