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POF# How to use an interface in a separate module
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copied!<p>So I have been doing research on interfaces on F#. I have found these 2 articles on it. The <a href="http://msdn.microsoft.com/en-us/library/vstudio/dd233207.aspx" rel="nofollow">MSDN</a> and <a href="http://fsharpforfunandprofit.com/posts/interfaces/" rel="nofollow">F# for fun and profit</a> But unfortunately they are only skin deep. </p> <p><strong>UPDATED</strong></p> <p>here is my module with my interfaces</p> <pre><code>//open statements omitted for brevity module DrawingInterfaces = ///gets a string representation of the SVG code representation of the object type IRepresentable_SVG = abstract member getSVGRepresenation : unit -> string //other interfaces omitted for brevity </code></pre> <p>Now within the same namespace and physical folder also I have this:</p> <pre><code> type lineSet (x1off,x2off,y1off,y2off,x1,x2,y1,y2,rot,rotOff,count) = //tons of member vals omitted for brevity member val x1Start = x1 with get, set interface DrawingInterfaces.IRepresentable_SVG with member __.getSVGRepresenation() = let mutable svg = "" let mutable currentx1 = x1Start svg </code></pre> <p>This used to give me 2 errors, before I was using the __. notation for the member. The first error was on the interface line. And a second on the member line. The errors were respectively:</p> <pre><code>The type 'IRepresentable_SVG' is not defined This instance member needs a parameter to represent the object being invoked. </code></pre> <p>I was able to fix the first one by changing the file order. Thanks to John Palmer. The second one is nearly fixed./</p> <p>After using the __ . notation I was able to get rid of the second error. However, now a new error pops up when I try to use type members in my interface implementation.</p> <pre><code> let mutable currentx1 = x1Start </code></pre> <p>x1Start shows as not being defined. I need to be able to use values stored in my other members within my implementation.</p>

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