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POUnusual C# operators in decompiled source...?
 

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    <p>I've just decompiled some 3rd party source to debug an issue, using DotPeek. The output code contains some unusual operators, which AFAIK aren't valid C#, so I'm wondering what they mean...</p> <p>The extract looks like (with Dotpeek comments included, as they are probably relevant);</p> <pre><code>protected internal void DoReceive(ref byte[] Buffer, int MaxSize, out int Written) { Written = 0; . . . // ISSUE: explicit reference operation // ISSUE: variable of a reference type int&amp; local = @Written; int num = SomeMethod(); . . . // ISSUE: explicit reference operation ^local = num; } </code></pre> <p>So, 3 unusual operators in there... <code>int&amp; = @Written</code> seems to be assigning a pointer to a variable that is named pointlessly with the @ character?</p> <p>But what is <code>^local = num;</code> ???</p> <p>OK, here is the equivalent snippet from ILSpy, which makes more sense, I guess the decompile to C# didn't produce a valid equivalent?</p> <p><strong>'C#'</strong></p> <pre><code> int&amp; local = @Written; byte[] numArray2 = this.FInSpool; int num = (int) __Global.Min(numArray2 == null ? 0L : (long) numArray2.Length, (long) MaxSize); ^local = num; </code></pre> <p><strong>IL</strong></p> <pre><code> byte[] expr_22 = this.FInSpool; Written = (int)__Global.Min((long)((expr_22 == null) ? 0 : expr_22.Length), (long)MaxSize); </code></pre> <p>So, I guess the 'C#' isn't quite valid? That IL would be valid C#, not sure why DotPeek produced the output it did. Perhaps I'll stick to ILSpy for this one...?</p>
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    1. USRJ Lohan
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    1. COAre you sure you decompiled it to C#? THose are C++/CLI operators.
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      1. USD Stanley
    2. COMy guess would be `^local` relates to the fact that `Written` is an out parameter. It seems to be dereferencing the pointer.
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      1. USMatt Greer
    3. COI don't think int& is a valid term in C#? Can you paste the original MSIL if possible? C# only exposes a subset of MSIL, so it has either been incorrectly decompiled, or the source language isn't C#.
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      1. USDominic Zukiewicz
 

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