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| <h1 class="content-header header-section1" id="ref_depr_oldsyntax" itemprop="headline">Old FTL syntax</h1> |
| </div></div><p>With the old FTL syntax the <code class="inline-code">#</code> was not |
| required (prior 2.1 not even allowed) in the FTL tags. For example, |
| you could write this:</p> |
| |
| <div class="code-wrapper"><pre class="code-block code-template"><html> |
| <head> |
| <title>Welcome!</title> |
| </head> |
| <body> |
| <h1>Welcome ${user}!</h1> |
| <p>We have there animals: |
| <ul> |
| <strong><list animals as being></strong> |
| <li>${being.name} for ${being.price} Euros |
| <strong></list></strong> |
| </ul> |
| <strong><include "common_footer.html"></strong> |
| </body> |
| </html></pre></div><p>While the <code class="inline-code">#</code>-less syntax was more natural for |
| HTML authors, it had too many drawbacks, so finally we have decided to |
| deprecate it. With the newer syntax (a.k.a ``strict syntax''), the |
| <code class="inline-code">#</code> is strictly required. That is, things like |
| <code class="inline-code"><include "common_footer.html"></code> will go to the |
| output as is, since they are not considered as FTL tags. Note that |
| user-defined directives use <code class="inline-code">@</code> <em>instead |
| of</em> <code class="inline-code">#</code>.</p><p>However, to give users time to prepare for this change, in |
| FreeMarker 2.1 and 2.2 the usage of <code class="inline-code">#</code> is optional, |
| unless the programmer enables strict syntax mode in the FreeMarker |
| configuration by calling <code class="inline-code">setStrictSyntaxMode(true)</code> |
| on <code class="inline-code">Configuration</code>. In fact, we strongly recommend |
| this to programmers. Starting from some later release this setting |
| will be initially set to <code class="inline-code">true</code>. Also, you can |
| specify if you want to use strict syntax or old syntax in the template |
| files with the <a href="ref_directive_ftl.html#ref.directive.ftl"><code>ftl</code> |
| directive</a>.</p><p>The advantages of ``strict syntax'' over the legacy FTL syntax |
| are:</p><ul> |
| <li> |
| <p>Since all |
| <code class="inline-code"><#<em class="code-color">...</em>></code> and |
| <code class="inline-code"></#<em class="code-color">...</em>></code> are |
| reserved for FTL:</p> |
| |
| <ul> |
| <li> |
| <p>We can introduce new directives without breaking |
| backward compatibility.</p> |
| </li> |
| |
| <li> |
| <p>We can detect if you made a typo, i.e. |
| <code class="inline-code"><#inculde |
| <em class="code-color">...</em>></code> is treated as |
| parse-time error, rather than silently treated as simple |
| text.</p> |
| </li> |
| |
| <li> |
| <p>It is easier for third-party tools to handle templates |
| (e.g. do syntax highlighting), especially since they don't |
| have to know about the new directives introduced with new |
| releases.</p> |
| </li> |
| |
| <li> |
| <p>Templates are more readable, since it is easier to spot |
| <code class="inline-code"><#...></code> tags embedded into HTML or |
| other markup.</p> |
| </li> |
| </ul> |
| </li> |
| |
| <li> |
| <p><code class="inline-code"><#</code> and <code class="inline-code"></#</code> is |
| illegal XML (except in CDATA sections), and illegal in almost all |
| other SGML applications, so they can't interfere with the tags |
| used in the static text parts (e.g. if you have |
| <code class="inline-code">include</code> element in the generated XML).</p> |
| </li> |
| </ul><div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="ref_depr_transform.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_depr_numerical_interpolation.html"><span>Next</span></a></div></div></div></div> </div> |
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| <time itemprop="dateModified" datetime="2020-07-09T23:48:37Z" title="Thursday, July 9, 2020 11:48:37 PM GMT">2020-07-09 23:48:37 GMT</time> </p> |
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