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POHow do I convert a function wrapper in to templates?
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  1. POHow do I convert a function wrapper in to templates?
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    copied!<p>I have several very similar functions:</p> <pre><code>v8::Handle&lt;v8::Value&gt; jsAudioPlay(const v8::Arguments &amp;args) { Audio *audio = static_cast&lt;Audio*&gt;(args.This()-&gt;GetPointerFromInternalField(0)); if (audio != NULL) audio-&gt;play(get(args[0], 0)); return args.This(); } v8::Handle&lt;v8::Value&gt; jsAudioPause(const v8::Arguments &amp;args) { Audio *audio = static_cast&lt;Audio*&gt;(args.This()-&gt;GetPointerFromInternalField(0)); if (audio != NULL) audio-&gt;pause(); return args.This(); } v8::Handle&lt;v8::Value&gt; jsAudioLoop(const v8::Arguments &amp;args) { Audio *audio = static_cast&lt;Audio*&gt;(args.This()-&gt;GetPointerFromInternalField(0)); if (audio != NULL) audio-&gt;loop(get(args[0], -1)); return args.This(); } v8::Handle&lt;v8::Value&gt; jsAudioVolume(const v8::Arguments &amp;args) { Audio *audio = static_cast&lt;Audio*&gt;(args.This()-&gt;GetPointerFromInternalField(0)); if (audio != NULL) audio-&gt;volume(get(args[0], 1.0f)); return args.This(); } </code></pre> <p>And I've been reading about C++ templates for hours and I'm convinced that it's possible to get rid of these functions and replace them with templates. I envision the end result will be something like:</p> <pre><code>typedef Handle&lt;Value&gt; (*InvocationCallback)(const Arguments&amp; args); template &lt;class T&gt; InvocationCallback FunctionWrapper ...; template &lt;class T&gt; FunctionWrapper FunctionReal ...; template &lt;class T, class arg1&gt; FunctionWrapper FunctionReal ...; template &lt;class T, class arg1, class arg2&gt; FunctionWrapper FunctionReal ...; </code></pre> <p>I realize similar questions have been asked, but I can't find an example of a template within a template like the above.</p> <hr> <p><strong>Update on 7/21/2012</strong></p> <p>Template:</p> <pre><code>template &lt;class T&gt; v8::Handle&lt;v8::Value&gt; jsFunctionTemplate(const v8::Arguments &amp;args) { T *t = static_cast&lt;T*&gt;(args.This()-&gt;GetPointerFromInternalField(0)); if (t != NULL) t-&gt;volume(args[0]-&gt;NumberValue()); return args.This(); } </code></pre> <p>Usage:</p> <pre><code>audio-&gt;PrototypeTemplate()-&gt;Set("Volume", v8::FunctionTemplate::New(&amp;jsFunctionTemplate&lt;Audio&gt;)); </code></pre> <p>Now if I could only figure out how to pass <code>&amp;Audio::volume</code> to the template, I'll be in business.</p> <hr> <p><strong>Update on 7/24/2012</strong></p> <p>Refer to my answer for how I solved this.</p>
 

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