<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Nov 2, 2014, at 1:02 PM, Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu" class="">shijunxiao@email.arizona.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi Alex<div class=""><br class=""></div><div class="">This rule (and many other rules) uses the keyword "should".</div><div class="">"should" is to be interpreted according to RFC2119, which means an exception can be granted when properly justified.</div><div class=""><br class=""></div><div class="">What about:</div><blockquote style="margin:0 0 0 40px;border:none;padding:0px" class=""><div class="">rule x. `auto` type specifier SHOULD only be used for local variables.</div></blockquote></div></div></blockquote><div><br class=""></div><div>That’s ok.</div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class=""><br class=""></div><div class="">Yours, Junxiao<br class=""><div class="gmail_extra"><br class=""><div class="gmail_quote">On Sun, Nov 2, 2014 at 1:57 PM, Alex Afanasyev <span dir="ltr" class=""><<a href="mailto:alexander.afanasyev@ucla.edu" target="_blank" class="">alexander.afanasyev@ucla.edu</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><span class=""><blockquote type="cite" class=""><div dir="ltr" class=""><div class="">rule x. `auto` type should only be used for local variables.<br class=""></div></div></blockquote><blockquote type="cite" style="color:rgb(80,0,80)" class=""><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><br class=""></div><div class="">Where else, potentially, it can be used?</div><br class=""><blockquote type="cite" class=""><div dir="ltr" class=""></div></blockquote></div></blockquote></div></div></blockquote><blockquote type="cite" class=""><div dir="ltr" class=""><div class="">`auto` specifier can be used to declare variables at any scope: block scope, namespace scope, init statement of for loop.</div><div class="">The proposed rule is to forbid using `auto` specifier at namespace scope, because such usage makes the code less readable.</div></div></blockquote><div class=""><br class=""></div></span><div class="">I would avoid making such an explicit rule. I would rather take case by case approach, where namespace-scope auto should be generally avoided, but if it makes sense to use it, it can be used.</div></div></div></blockquote></div><br class=""></div></div></div>
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