<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">I had been operating on the assumption that a leading blank line would be stripped if present, since the syntax in code would look much cleaner, but a trailing line would not since it would likely be intentional. I guess that&#39;s another detail that would need to be fleshed out if we decide to go with triple quote syntax (which, at this point, isn&#39;t a given... chris lattner brings up some very good points that might require more involved, potentially heredoc-like, syntax to solve).</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Your fourth rule, however, I don&#39;t agree with at all. It should be obvious from where you place the final quotes whether or not the string includes a trailing newline. Just like in ruby, I believe in and value the principle of least surprize. </div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">- Travis Tilley</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Dec 11, 2015 at 1:04 AM, Jason Dusek <span dir="ltr">&lt;<a href="mailto:jason.dusek@gmail.com" target="_blank">jason.dusek@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><span class=""><p style="margin:1.2em 0px!important">On Thu, 10 Dec 2015 at 21:45, Travis Tilley via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt; wrote:</p>
<p style="margin:1.2em 0px!important"></p><div><p></p><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:verdana,sans-serif">The ruby &lt;&lt;- heredoc syntax, unlike the &lt;&lt; heredoc syntax, will strip indentation if necessary. Technically, it searches for the &quot;least indented line&quot; in the whole string, and removes exactly that amount from each line. So yes, the indentation problem -is- solved in ruby (though it might break entirely if you have empty lines, since the least indented line has no indentation).</div></div></blockquote><p></p></div><p style="margin:1.2em 0px!important"></p>
</span><p style="margin:1.2em 0px!important">To my mind, the rules should be:</p>
<ol style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">The indentation level is set from the least indented line that is not the first line and is not empty.</li>
<li style="margin:0.5em 0px">A leading empty line is removed.</li>
<li style="margin:0.5em 0px">The leading line, if there is any text in it, is not subject to de-indentation.</li>
</ol>
<p style="margin:1.2em 0px!important">I genuinely believe these three rules taken together address all the errors and infelicities to which triple quotes and HEREDOCs subject us. Here are some examples:</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248);white-space:pre-wrap;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248)">text = <span style="color:rgb(221,17,68)">&quot;&quot;&quot;
    Some

  Features
    Are
    Discussed
&quot;&quot;&quot;</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (1): The indentation is taken from the third line below `text`, so it&#39;s 2.</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (2): First line is: &quot;\n&quot; so it is removed.</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (3): No effect.</span>

text = <span style="color:rgb(221,17,68)">&quot;&quot;&quot;  Some

          Features
            Are
            Discussed
&quot;&quot;&quot;</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (1): The indentation is taken again from the line reading &quot;Features&quot;. Here it is 10.</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (2): No effect.</span>
<span style="color:rgb(153,153,136);font-style:italic"># From (3): The leading whitespace in `  Some` is preserved.</span>
</code></pre>
<p style="margin:1.2em 0px!important">Do you all think these rules pass muster?</p>
<p style="margin:1.2em 0px!important">A fourth rule — one which seems advisable but also less necessary than the others — is that a string constructed in this way always ends with a newline. It is a rule that perhaps leads to surprises and inconsistencies.</p>
<p style="margin:1.2em 0px!important">Best Regards,</p><p style="margin:1.2em 0px!important">Jason</p>
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</div></div>