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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 Precedence Operator
5 * / % &lt;&lt; &gt;&gt; &amp; &amp;^ 5 * / % &lt;&lt; &gt;&gt; &amp; &amp;^
4 + - | ^ 4 + - | ^
3 == != &lt; &lt;= > >= 3 == != &lt; &lt;= &gt; &gt;=
2 &amp;&amp; 2 &amp;&amp;
1 || 1 ||
</pre> </pre>
@ -2760,7 +2760,7 @@ For instance, <code>x / y * z</code> is the same as <code>(x / y) * z</code>.
x &lt;= f() x &lt;= f()
^a &gt;&gt; b ^a &gt;&gt; b
f() || g() f() || g()
x == y+1 &amp;&amp; &lt;-chan_ptr > 0 x == y+1 &amp;&amp; &lt;-chan_ptr &gt; 0
</pre> </pre>
@ -3686,17 +3686,16 @@ complex, or string constant.
"If" statements specify the conditional execution of two branches "If" statements specify the conditional execution of two branches
according to the value of a boolean expression. If the expression according to the value of a boolean expression. If the expression
evaluates to true, the "if" branch is executed, otherwise, if evaluates to true, the "if" branch is executed, otherwise, if
present, the "else" branch is executed. A missing condition present, the "else" branch is executed.
is equivalent to <code>true</code>.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
IfStmt = "if" [ SimpleStmt ";" ] [ Expression ] Block [ "else" Statement ] . IfStmt = "if" [ SimpleStmt ";" ] Expression Block [ "else" Statement ] .
</pre> </pre>
<pre> <pre>
if x > 0 { if x &gt; max {
return true; x = max
} }
</pre> </pre>
@ -3708,7 +3707,7 @@ executes before the expression is evaluated.
<pre> <pre>
if x := f(); x &lt; y { if x := f(); x &lt; y {
return x return x
} else if x > z { } else if x &gt; z {
return z return z
} else { } else {
return y return y