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go/doc/go1.15.html
Bryan C. Mills 583419e5d2 cmd/go/internal/{test,vet}: use a standard flag.FlagSet to parse flags
This removes much of the complexity of the implementation and use of
the cmd/go/internal/cmdflag package, and makes the behavior of GOFLAGS
in 'go test' and 'go vet' more consistent with other subcommands.

Some of the complexity reduction has been offset by code comments and
bug fixes, particularly for the handling of GOPATH arguments and flag
terminators ('--').

Fixes #32471
Fixes #18682

Change-Id: I1f6e46a7c679062e1e409e44a2b9f03b9172883b
Reviewed-on: https://go-review.googlesource.com/c/go/+/211358
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-02-25 20:54:34 +00:00

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<!--{
"Title": "Go 1.15 Release Notes",
"Path": "/doc/go1.15"
}-->
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<style>
main ul li { margin: 0.5em 0; }
</style>
<h2 id="introduction">DRAFT RELEASE NOTES — Introduction to Go 1.15</h2>
<p>
<strong>
Go 1.15 is not yet released. These are work-in-progress
release notes. Go 1.15 is expected to be released in August 2020.
</strong>
</p>
<h2 id="language">Changes to the language</h2>
<p>
TODO
</p>
<h2 id="ports">Ports</h2>
<p>
TODO
</p>
<h2 id="tools">Tools</h2>
<p>
TODO
</p>
<h3 id="go-command">Go command</h3>
<p>
TODO
</p>
<h4 id="go-flag-parsing">Flag parsing</h4>
<p><!-- https://golang.org/cl/211358 -->
Various flag parsing issues in <code>go</code> <code>test</code> and
<code>go</code> <code>vet</code> have been fixed. Notably, flags specified
in <code>GOFLAGS</code> are handled more consistently, and
the <code>-outputdir</code> flag now interprets relative paths relative to the
working directory of the <code>go</code> command (rather than the working
directory of each individual test).
</p>
<h2 id="runtime">Runtime</h2>
<p>
TODO
</p>
<h2 id="library">Core library</h2>
<p>
TODO
</p>
<dl id="testing"><dt><a href="/pkg/testing/">testing</a></dt>
<dd>
<p><!-- golang.org/issue/28135 -->
The <code>testing.T</code> type now has a <code>Deadline</code> method
that reports the time at which the test binary will have exceeded its
timeout.
</p>
</dl><!-- testing -->
<h3 id="minor_library_changes">Minor changes to the library</h3>
<p>
As always, there are various minor changes and updates to the library,
made with the Go 1 <a href="/doc/go1compat">promise of compatibility</a>
in mind.
</p>
<p>
TODO
</p>
<dl id="sync"><dt><a href="/pkg/sync/">sync</a></dt>
<dd>
<p><!-- golang.org/issue/33762 -->
The new method
<a href="/pkg/sync#Map.LoadAndDelete"><code>Map.LoadAndDelete</code></a>
atomically deletes a key and returns the previous value if present.
</p>
<p><!-- CL 205899 -->
The method
<a href="/pkg/sync#Map.Delete"><code>Map.Delete</code></a>
is more efficient.
</p>
</dl><!-- sync -->
<dl id="time"><dt><a href="/pkg/time/">time</a></dt>
<dd>
<p><!-- golang.org/issue/33184 -->
The new method
<a href="/pkg/time#Ticker.Reset"><code>Ticker.Reset</code></a>
supports changing the duration of a ticker.
</p>
</dd>
</dl><!-- time -->