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doc/go1.1.html: introduction 

R=golang-dev, adg, bradfitz
CC=golang-dev
https://golang.org/cl/7696045
This commit is contained in:
Rob Pike 2013-03-25 17:41:12 -07:00
parent eee3e63607
commit 4529c047b8
1 changed files with 41 additions and 9 deletions
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doc/go1.1.html
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@ -6,9 +6,41 @@
<h2 id="introduction">Introduction to Go 1.1</h2>
TODO
- overview
- link back to Go 1 and also Go 1 Compatibility docs.
<p>
The release of <a href="/doc/go1.html">Go version 1</a> (Go 1 or Go 1.0 for short)
in March of 2012 introduced a new period
of stability in the Go language and libraries.
That stability has helped nourish a growing community of Go users
and systems around the world.
Several "point" releases since
then—1.0.1, 1.0.2, and 1.0.3—have been issued.
These point releases fixed known bugs but made
no non-critical changes to the implementation.
</p>
<p>
This new release, Go 1.1, keeps the <a href="/doc/go1compat.html">promise
of compatibility</a> but adds a couple of significant
(backwards-compatible, of course) language changes, has a long list
of (again, compatible) library changes, and
includes major work on the implementation of the compilers,
libraries, and run-time.
The focus is on performance.
Benchmarking is an inexact science at best, but we see significant,
sometimes dramatic speedups for many of our test programs.
We trust that many of our users' programs will also see improvements
just by updating their Go installation and recompiling.
</p>
<p>
This document summarizes the changes between Go 1 and Go 1.1.
Very little if any code will need modification to run with Go 1.1,
although a couple of rare error cases surface with this release
and need to be addressed if they arise.
Details appear below; see the discussion of
<a href="#int">64-bit ints</a> and <a href="#unicode_literals">Unicode literals</a>
in particular.
</p>
<h2 id="language">Changes to the language</h2>
@ -62,7 +94,7 @@ a function literal closing over <code>w</code>:
<pre>
func (p []byte) (n int, err error) {
return w.Write(n, err)
return w.Write(p)
}
</pre>
@ -75,7 +107,7 @@ is equivalent to a function with an extra first argument, a receiver of type
<pre>
func (w *bufio.Writer, p []byte) (n int, err error) {
return w.Write(n, err)
return w.Write(p)
}
</pre>
@ -707,6 +739,10 @@ clearly a mistake in Go 1.0.
Since this API change fixes a bug, it is permitted by the Go 1 compatibility rules.
</li>
<li> TODO:
<code>net</code>: LookupNS, IPConn.ReadMsgIP, IPConn.WriteMsgIP, UDPConn.ReadMsgUDP, UDPConn.WriteMsgUDP, UnixConn.CloseRead, UnixConn.CloseWrite
</li>
<li>
The <a href="/pkg/net/"><code>net</code></a> package includes a new function,
<a href="/pkg/net/#DialOpt"><code>DialOpt</code></a>, to supply options to
@ -759,10 +795,6 @@ has two new functions,
which do ASCII-only trimming of leading and trailing spaces.
</li>
<li> TODO:
<code>net</code>: ListenUnixgram, LookupNS, IPConn.ReadMsgIP, IPConn.WriteMsgIP, UDPConn.ReadMsgUDP, UDPConn.WriteMsgUDP, UnixConn.CloseRead, UnixConn.CloseWrite
</li>
<li>
The new method <a href="/pkg/os/#FileMode.IsRegular"><code>os.FileMode.IsRegular</code> </a> makes it easy to ask if a file is a plain file.
</li>