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doc: faq updates part one

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Andrew Gerrand 2010-09-30 11:23:39 +10:00
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@ -191,37 +191,31 @@ if they enjoy it. Not every programmer
will, but we hope enough will find satisfaction in the approach it will, but we hope enough will find satisfaction in the approach it
offers to justify further development. offers to justify further development.
<h3 id="Is_Google_using_go_internally"> Is Google using Go <h3 id="Is_Google_using_go_internally"> Is Google using Go internally?</h3>
internally?</h3>
<p> The Go project was conceived to make it easier to write the kind <p>Yes. There are now several Go programs deployed in
of servers and other software Google uses internally, but the production inside Google. For instance, the server behind
implementation isn't quite mature enough yet for large-scale <a href="http://golang.org">http://golang.org</a> is a Go program;
production use. While we continue development we are also doing in fact it's just the <a href="/cmd/godoc"><code>godoc</code></a>
experiments with the language as a candidate server environment. It's document server running in a production configuration.
getting there. For instance, the server behind <a
href="http://golang.org">http://golang.org</a> is a Go program; in
fact it's just the <a href="/cmd/godoc"><code>godoc</code></a> document server running in a
production configuration.
<h3 id="Do_Go_programs_link_with_Cpp_programs"> <h3 id="Do_Go_programs_link_with_Cpp_programs">
Do Go programs link with C/C++ programs?</h3> Do Go programs link with C/C++ programs?</h3>
<p> <p>
There are two Go compiler implementations, <code>6g</code> and friends, generically called There are two Go compiler implementations, <code>6g</code> and friends,
<code>gc</code>, and <code>gccgo</code>. generically called <code>gc</code>, and <code>gccgo</code>.
<code>Gc</code> uses a different calling convention and linker and can <code>Gc</code> uses a different calling convention and linker and can
therefore only be linked with C programs using the same convention. therefore only be linked with C programs using the same convention.
There is such a C compiler but no C++ compiler. <code>Gccgo</code> is a There is such a C compiler but no C++ compiler.
GCC front-end that can, with care, be linked with GCC-compiled <code>Gccgo</code> is a GCC front-end that can, with care, be linked with
C or C++ programs. However, because Go is garbage-collected it will be GCC-compiled C or C++ programs.
unwise to do so, at least naively.
<p> <p>
There is a &ldquo;foreign function interface&rdquo; to allow safe calling of C-written The <a href="/cmd/cgo/">cgo</a> program provides the mechanism for a
libraries from Go code. We expect to use SWIG to extend this capability &ldquo;foreign function interface&rdquo; to allow safe calling of
to C++ libraries. There is no safe way to call Go code from C or C++ yet. C libraries from Go code. SWIG extends this capability to C++ libraries.
<h3 id="Does_Go_support_Google_protocol_buffers"> <h3 id="Does_Go_support_Google_protocol_buffers">
Does Go support Google's protocol buffers?</h3> Does Go support Google's protocol buffers?</h3>
@ -325,6 +319,9 @@ function's state being torn down after an error, which is sufficient
to handle catastrophe but requires no extra control structures and, to handle catastrophe but requires no extra control structures and,
when used well, can result in clean error-handling code. when used well, can result in clean error-handling code.
</p> </p>
<p>
See the <a href="http://blog.golang.org/2010/08/defer-panic-and-recover.html">Defer, Panic, and Recover</a> article for details.
</p>
<h3 id="assertions"> <h3 id="assertions">
@ -697,6 +694,10 @@ responsible for a particular piece of data.
Do not communicate by sharing memory. Instead, share memory by communicating. Do not communicate by sharing memory. Instead, share memory by communicating.
</p> </p>
<p>
See the <a href="/doc/codewalk/sharemem/">Share Memory By Communicating</a> code walk and its <a href="http://blog.golang.org/2010/07/share-memory-by-communicating.html">associated article</a> for a detailed discussion of this concept.
</p>
<h3 id="Why_no_multi_CPU"> <h3 id="Why_no_multi_CPU">
Why doesn't my multi-goroutine program use multiple CPUs?</h3> Why doesn't my multi-goroutine program use multiple CPUs?</h3>
@ -885,6 +886,8 @@ That script finds the <code>Test</code> functions,
builds a test binary, and runs it. builds a test binary, and runs it.
</p> </p>
<p>See the <a href="/doc/code.html">How to Write Go Code</a> document for more details.</p>
<h2 id="Implementation">Implementation</h2> <h2 id="Implementation">Implementation</h2>
@ -1013,6 +1016,10 @@ is not just the expression grammar; keywords such as <code>func</code>
and <code>chan</code> keep things clear. and <code>chan</code> keep things clear.
</p> </p>
<p>
See the <a href="http://blog.golang.org/2010/07/gos-declaration-syntax.html">Go's Declaration Syntax</a> article for more details.
</p>
<h3 id="no_pointer_arithmetic"> <h3 id="no_pointer_arithmetic">
Why is there no pointer arithmetic?</h3> Why is there no pointer arithmetic?</h3>
<p> <p>