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POHow to emulate C logic and syntax in a template engine (preprocessor)?
 

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  1. POHow to emulate C logic and syntax in a template engine (preprocessor)?
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    <p>We have a custom <strong>C template engine</strong> for web template processing. Let us say that we have a file "index.html" with the following content:</p> <pre><code>{% #include &lt;stdio.h&gt; %} &lt;!doctype html&gt; &lt;html&gt; &lt;head&gt;&lt;title&gt;{{ title }}&lt;/title&gt;&lt;/head&gt; &lt;body&gt; {{ body }} {% printf("test"); %} {% printf("test2") %} {% printf("test3"); %} {% printf("test4"); printf("test5"); %} {% printf("test6"); printf("test7") %} {% printf("%d", isalpha('a')); %} &lt;/body&gt; &lt;/html&gt; </code></pre> <p>When the template engine is called (initialized), it scans all the files in a particular "views" folder. The "index.html" file happens to be in this folder. It is scanned and cached in memory of the main program which has called the template engine.</p> <p>When a <strong>request</strong> is made, the template engine's operation function is called. The function takes the <strong>cached code</strong> and an <strong>array</strong> of <strong>variables</strong> with their types and values as parameters and <strong>returns</strong> a constant char <strong>buffer</strong> with the updated variables and logical operations. For the sake of simplicity, let us say that logical operations have the <strong>{% ... %}</strong> and variables the <strong>{{ ... }}</strong> syntax respectively.</p> <p>One should be able to use C functions and general logic in the markup language. You should even be able to define functions in templates. If something goes wrong, the variable or logical operation should return <strong>void</strong>. The end result of our called "index.html" page with "body" and "title" as the variables of {{ body }} and {{ title }} respectively should look like this:</p> <pre><code>&lt;!doctype html&gt; &lt;html&gt; &lt;head&gt;&lt;title&gt;title&lt;/title&gt;&lt;/head&gt; &lt;body&gt; bodytesttest3test4test5 &lt;/body&gt; &lt;/html&gt; </code></pre> <p>How does one emulate the logic and syntax of the C language? Is this possible? Do you need to go as far as to develop a custom library of the language's operations and function calls or is there a simpler solution? What is the best way of implementing such a solution?</p>
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    1. COThis is madness.
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    2. CO@blueshifr - Madness? This is Sparta.
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