<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div style="direction: inherit;">I am very much a fan of this type of thing.</div><div style="direction: inherit;"><br></div><div style="direction: inherit;">It's very clear that new line are included in the string. Leading white space is explicit. It is easy to align. It's easy to copy and paste. And there isn't excessive escaping.</div><div><br>On Apr 3, 2017, at 7:00 AM, Ricardo Parada via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8">What is the purpose of that backslash? It does not feel like an improvement. <div class=""><br class=""></div><div class=""><div class="">I think we should focus on:</div><div class=""><br class=""></div><div class="">1. Looking pretty</div><div class="">2. Allow unescaped quote, double quote as well single/double apostrophe characters </div><div class="">3. Allow interpolation </div><div class="">4. No need to add the \n character for each line</div><div class="">5. It should have a continuation character</div><div class="">6. Keep it simple</div><div class=""><br class=""></div><div class="">Something like this:</div><div class=""><br class=""></div><div class=""><pre class="" style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; margin-top: 0px; margin-bottom: 16px; line-height: 1.45; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-wrap: normal;"><code class="" style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; padding: 0px; margin: 0px; background-color: transparent; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-break: normal; border: 0px; display: inline; line-height: inherit; word-wrap: normal;">let xml = M"<?xml version="1.0"?>
"<catalog>
" <book id="bk101" empty="">
" <author><font color="#ff2600" class="">\(</font><font color="#0433ff" class="">author</font><font color="#ff2600" class="">)</font></author>
" </book>
"</catalog></code></pre><div class="">Or maybe this:</div><div class=""><br class=""></div><div class=""><pre class="" style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; margin-top: 0px; margin-bottom: 16px; line-height: 1.45; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-wrap: normal;"><code class="" style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; padding: 0px; margin: 0px; background-color: transparent; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-break: normal; border: 0px; display: inline; line-height: inherit; word-wrap: normal;">let xml = """<?xml version="1.0"?>
"<catalog>
" <book id="bk101" empty="">
" <author><font color="#ff2600" class="">\(</font><font color="#0433ff" class="">author</font><font color="#ff2600" class="">)</font></author>
" </book>
"</catalog></code></pre><div class="">In the first example the multiline literal is started with M". In the second example it starts with three double quotes """. I really have no preference. In both examples there is no need to have a \ or \n at the end of the line.</div><div class=""><br class=""></div><div class="">You can have quote characters in the string, including double quotes as shown by<font face="Menlo" class=""> empty=""</font>. You can have interpolation, i.e. <font color="#ff2600" class="" style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;">\(</font><font color="#0433ff" class="" style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;">author</font><font color="#ff2600" class="" style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;">)</font>. </div><div class=""><br class=""></div><div class="">You have a continuation character which helps as a visual guide and as a marker for the beginning of each line.</div></div><div class=""><br class=""></div><div class="">The multi string literal ends when there are no more continuation characters.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div></div><div><blockquote type="cite" class=""><div class="">On Apr 3, 2017, at 3:01 AM, Adrian Zubarev via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="bloop_markdown" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);"><p style="margin: 15px 0px; -webkit-margin-before: 0px;" class="">Hello Swift community,</p><p style="margin: 15px 0px;" class="">on Github there is a PR for this proposal, but I couldn’t find any up to date thread, so I’m going to start by replying to the last message I found, without the last content.</p><p style="margin: 15px 0px;" class="">I really like where this proposal is going, and my personal preference are *continuation quotes*. However the proposed solution is still not perfect enough for me, because it still lacks of precise control about the trailing space characters in each line of a multi-line string.</p><p style="margin: 15px 0px;" class="">Proposed version looks like this:</p><pre style="margin: 15px 0px; font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); overflow: auto; padding: 4px 8px; word-break: normal; word-wrap: normal;" class=""><code class="swift" style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 0px; margin: 0px; padding: 0px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;">let xml = "<?xml version=\"1.0\"?>
"<catalog>
" <book id=\"bk101\" empty=\"\">
" <author>\(author)</author>
" <title>XML Developer's Guide</title>
" <genre>Computer</genre>
" <price>44.95</price>
" <publish_date>2000-10-01</publish_date>
" <description>An in-depth look at creating applications with XML.</description>
" </book>
"</catalog>
""
</code></pre><p style="margin: 15px 0px;" class="">I would like to pitch an enhancement to fix the last tiny part by adding the escaping character ‘' to the end of each line from 1 to (n - 1) of the n-lined string. This is similar to what Javascript allows us to do, except that we also have precise control about the leading space character through ’"’.</p><p style="margin: 15px 0px;" class="">The proposed version will become this:</p><pre style="margin: 15px 0px; font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); overflow: auto; padding: 4px 8px; word-break: normal; word-wrap: normal;" class=""><code class="swift" style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 0px; margin: 0px; padding: 0px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;">let xml = "<?xml version=\"1.0\"?>\
"<catalog>\ // If you need you can comment here
" <book id=\"bk101\" empty=\"\">\
" <author>\(author)</author>\
" <title>XML Developer's Guide</title>\
" <genre>Computer</genre>\
" <price>44.95</price>\
" <publish_date>2000-10-01</publish_date>\
" <description>An in-depth look at creating applications with XML.</description>\
" </book>\
"</catalog>\
""
</code></pre><p style="margin: 15px 0px;" class="">Here is another example:</p><pre style="margin: 15px 0px; font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(204, 204, 204); overflow: auto; padding: 4px 8px; word-break: normal; word-wrap: normal;" class=""><code class="swift" style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 0px; margin: 0px; padding: 0px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;">let multilineString: String = "123__456__\ // indicates there is another part of the string on the next line
"__789_____\ // aways starts with `"` and ends with either `\` or `"`
"_____0_" // precise control about pre- and post-space-characters
let otherString = "\(someInstance)\ /* only comments are allowed in between */ "text \(someOtherInstance) text"
</code></pre><p style="margin: 15px 0px;" class="">This is simply<span class="Apple-converted-space"> </span><strong style="-webkit-margin-before: 0px;" class="">continuation quotes</strong><span class="Apple-converted-space"> </span>combined with<span class="Apple-converted-space"> </span><strong class="">backslash concatenation</strong>.</p><div style="margin: 15px 0px;" class=""><br class="webkit-block-placeholder"></div></div><div class="bloop_original_html" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);"><div class="bloop_markdown"><div style="margin: 15px 0px; -webkit-margin-before: 0px;" class=""><br class="webkit-block-placeholder"></div></div><div class="bloop_original_html"><div id="bloop_customfont" style="font-family: Helvetica, Arial; font-size: 13px; margin: 0px;" class=""><br class=""></div><br class=""><div id="bloop_sign_1491202043170386944" class="bloop_sign"><div style="font-family: helvetica, arial; font-size: 13px;" class="">-- <br class="">Adrian Zubarev<br class="">Sent with Airmail</div></div></div><div class="bloop_markdown"><div style="margin: 15px 0px; -webkit-margin-before: 0px;" class=""><br class="webkit-block-placeholder"></div></div></div><div class="bloop_markdown" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);"><div style="margin: 15px 0px; -webkit-margin-before: 0px;" class=""><br class="webkit-block-placeholder"></div></div><span style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; 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