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go spec: make condition mandatory in if statements

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Plus a few minor HTML fixes.

Fixes #1535.

R=r, rsc, ken2, iant, r2
CC=golang-dev
https://golang.org/cl/4185065
This commit is contained in:
Robert Griesemer 2011-02-22 15:31:57 -08:00
parent 52943bfe4d
commit a1368a6ad0
1 changed files with 7 additions and 8 deletions
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15
doc/go_spec.html
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@ -2744,7 +2744,7 @@ and finally <code>||</code> (logical or):
Precedence Operator
5 * / % &lt;&lt; &gt;&gt; &amp; &amp;^
4 + - | ^
3 == != &lt; &lt;= > >=
3 == != &lt; &lt;= &gt; &gt;=
2 &amp;&amp;
1 ||
</pre>
@ -2760,7 +2760,7 @@ For instance, <code>x / y * z</code> is the same as <code>(x / y) * z</code>.
x &lt;= f()
^a &gt;&gt; b
f() || g()
x == y+1 &amp;&amp; &lt;-chan_ptr > 0
x == y+1 &amp;&amp; &lt;-chan_ptr &gt; 0
</pre>
@ -3686,17 +3686,16 @@ complex, or string constant.
"If" statements specify the conditional execution of two branches
according to the value of a boolean expression. If the expression
evaluates to true, the "if" branch is executed, otherwise, if
present, the "else" branch is executed. A missing condition
is equivalent to <code>true</code>.
present, the "else" branch is executed.
</p>
<pre class="ebnf">
IfStmt = "if" [ SimpleStmt ";" ] [ Expression ] Block [ "else" Statement ] .
IfStmt = "if" [ SimpleStmt ";" ] Expression Block [ "else" Statement ] .
</pre>
<pre>
if x > 0 {
return true;
if x &gt; max {
x = max
}
</pre>
@ -3708,7 +3707,7 @@ executes before the expression is evaluated.
<pre>
if x := f(); x &lt; y {
return x
} else if x > z {
} else if x &gt; z {
return z
} else {
return y