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docs: Adjust contributor guidelines about curly brackets

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After recent discussion it looks like curly brackets around one-line
bodies are preferred if the preceding condition is, itself, multiline.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Martin Kletzander 2014-11-13 14:56:53 +01:00
parent f5e65e4b71
commit a9d07d33a0
2 changed files with 27 additions and 12 deletions
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18
HACKING
View File

@ -370,14 +370,20 @@ although use of a semicolon is not currently rejected.
Curly braces
============
Omit the curly braces around an "if", "while", "for" etc. body only when that
body occupies a single line. In every other case we require the braces. This
ensures that it is trivially easy to identify a single-'statement' loop: each
has only one 'line' in its body.
Omit the curly braces around an "if", "while", "for" etc. body only when both
that body and the condition itself occupy a single line. In every other case
we require the braces. This ensures that it is trivially easy to identify a
single-'statement' loop: each has only one 'line' in its body.
Omitting braces with a single-line body is fine:
while (expr) // single line body; {} is forbidden
single_line_stmt();
while (expr) // one-line body -> omitting curly braces is ok
while (expr(arg1,
arg2)) // indentation makes it obvious it is single line,
single_line_stmt(); // {} is optional (not enforced either way)
while (expr1 &&
expr2) // multi-line, at same indentation, {} required
single_line_stmt();
However, the moment your loop/if/else body extends on to a second line, for

21
docs/hacking.html.in
View File

@ -462,17 +462,26 @@
<p>
Omit the curly braces around an <code>if</code>, <code>while</code>,
<code>for</code> etc. body only
when that body occupies a single line. In every other case we require
<code>for</code> etc. body only when both that body and the condition
itself occupy a single line. In every other case we require
the braces. This ensures that it is trivially easy to identify a
single-<i>statement</i> loop: each has only one <i>line</i> in its body.
</p>
<p>
Omitting braces with a single-line body is fine:
</p>
<pre>
while (expr) // one-line body -> omitting curly braces is ok
while (expr) // single line body; {} is forbidden
single_line_stmt();
</pre>
<pre>
while (expr(arg1,
arg2)) // indentation makes it obvious it is single line,
single_line_stmt(); // {} is optional (not enforced either way)
</pre>
<pre>
while (expr1 &amp;&amp;
expr2) // multi-line, at same indentation, {} required
single_line_stmt();
</pre>