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        <h3 class="left_item_title">In the news...</h3>
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                <h2 class="news_item_title">
                    <a href="cld_ctx-gen.html">CLD: Context generation</a>
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                <p class="news_item_date">
                    2025-03-11 00:00
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<p><img src="../../images/2025-03_redux-data-flow.jpg" alt="splash" /></p>
<h1 id="contextgeneration">Context generation</h1>
<p>In February I've updated the <strong>C</strong>ross-<strong>l</strong>anguage <strong>d</strong>ialect (CLD) translator to
generate Context out of YML. The generated Contexts have already been
used for the following projects:</p>
<ul>
<li>CLD (the CLD translator generated its own Context)</li>
<li>LHA</li>
<li>PSKOV</li>
</ul>
<p>I never really took time to explain what Context is, so here's
a very short explanation: Context is very close to
<a href="https://redux.js.org/introduction/getting-started#basic-example">Store in Redux</a>. I'm afraid this is not yet the time
to explain Context in detail because I don't yet have a good
argument why you need Context. Once that time comes I do it.</p>
<p>Now let's get back to the Context generation. Here's how LHA's YML for Context looks like: (<a href="https://github.com/OGStudio/local-host-access/blob/main/cld/entities.yml">entities.yml</a>):</p>
<pre><code># Application state context
Context:
    type: context
    fields:
        # Command line arguments
        arguments: [String]
        consoleOutput: String
        defaultDir: String
        didLaunch: Bool
        dir: String
        httpDefaultPort: Int
        httpLaunch: Bool
        httpPort: Int
        httpReply: String
        httpRequest: NetRequest
</code></pre>
<p>CLD translator converts it to the following code in Kotlin (<a href="https://github.com/OGStudio/local-host-access/blob/main/src/entities.kt#L3">entities.kt</a>):</p>
<pre><code>// Application state context
data class Context(
    // Command line arguments
    var arguments: Array&lt;String&gt; = arrayOf(),
    var consoleOutput: String = "",
    var defaultDir: String = "",
    var didLaunch: Boolean = false,
    var dir: String = "",
    var httpDefaultPort: Int = 0,
    var httpLaunch: Boolean = false,
    var httpPort: Int = 0,
    var httpReply: String = "",
    var httpRequest: NetRequest = NetRequest(),
    override var recentField: String = "",
): CLDContext {
    override fun &lt;T&gt; field(name: String): T {
        if (name == "arguments") {
            return arguments as T
        } else if (name == "consoleOutput") {
            return consoleOutput as T
        } else if (name == "defaultDir") {
            return defaultDir as T
        } else if (name == "didLaunch") {
            return didLaunch as T
        } else if (name == "dir") {
            return dir as T
        } else if (name == "httpDefaultPort") {
            return httpDefaultPort as T
        } else if (name == "httpLaunch") {
            return httpLaunch as T
        } else if (name == "httpPort") {
            return httpPort as T
        } else if (name == "httpReply") {
            return httpReply as T
        } else if (name == "httpRequest") {
            return httpRequest as T
        }
        return "unknown-field-name" as T
    }

    override fun selfCopy(): CLDContext {
        return this.copy()
    }

    override fun setField(
        name: String,
        value: Any?
    ) {
        if (name == "arguments") {
            arguments = value as Array&lt;String&gt;
        } else if (name == "consoleOutput") {
            consoleOutput = value as String
        } else if (name == "defaultDir") {
            defaultDir = value as String
        } else if (name == "didLaunch") {
            didLaunch = value as Boolean
        } else if (name == "dir") {
            dir = value as String
        } else if (name == "httpDefaultPort") {
            httpDefaultPort = value as Int
        } else if (name == "httpLaunch") {
            httpLaunch = value as Boolean
        } else if (name == "httpPort") {
            httpPort = value as Int
        } else if (name == "httpReply") {
            httpReply = value as String
        } else if (name == "httpRequest") {
            httpRequest = value as NetRequest
        }
    }
}
</code></pre>
<h1 id="march">March</h1>
<p>Kotlin is currently the anchor programming language of CLD. Thus, to use Kotlin,
one would have to install related Java tools (Gradle, Android Studio or JVM itself).
Such a requirement makes it impossible to have a web browser only development
tool. And being able to code in a web browser is something I consider the
key feature for code portability.</p>
<p>That's why in March I plan to create the draft of a tool running in a web browser.</p>
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