sending an item acquires the semaphore, and receiving an item releases
the semaphore.
This is a common idiom for limiting concurrency.
</p>

<p>
This program starts a goroutine for every entry in the work list, but the
goroutines coordinate using the <code>limit</code> channel to ensure
that at most three are running work functions at a time.
</p>

<pre>

  The actual segment value may be accessed by calling the <a href="/pkg/net/http#Request.PathValue"><code>Request.PathValue</code></a> method.
  A wildcard ending in "...", like <code>/files/{path...}</code>, must occur at the end of a pattern and matches all the remaining segments.
</p>

<p>
  A pattern that ends in "/" matches all paths that have it as a prefix, as always.

from the value obtained by executing and rounding the instructions individually.
An explicit floating-point type <a href="#Conversions">conversion</a> rounds to
the precision of the target type, preventing fusion that would discard that rounding.
</p>

<p>
For instance, some architectures provide a "fused multiply and add" (FMA) instruction
that computes <code>x*y + z</code> without rounding the intermediate result <code>x*y</code>.

in a declaration, but it does not introduce a binding and thus is not declared.
In the package block, the identifier <code>init</code> may only be used for
<a href="#Package_initialization"><code>init</code> function</a> declarations,
and like the blank identifier it does not introduce a new binding.
</p>

<pre class="ebnf">
Declaration   = ConstDecl | TypeDecl | VarDecl .