Databases
StackOverflow2013
Postsdbo
POReflection.Emit code calls "base." instead of "this." on Boolean field
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POReflection.Emit code calls "base." instead of "this." on Boolean field
    primarykey
    data
    text
    <p>I have the following class A.</p> <pre><code>public class A { public string Name { get; set; } } </code></pre> <p>I need to emit a dynamic proxy using Reflection.Emit to override Equals.</p> <pre><code>// This class must be generated by Reflection.Emit. public class AProxy : A { private bool equalsHasBeenCalled; public override bool Equals(object obj) { if (this.equalsHasBeenCalled) { return base.Equals(obj); } this.equalsHasBeenCalled = true; return CaseInsensitiveComparer.Equals(this, obj); // Demo. } } </code></pre> <p>However, the actual generated code (viewed with Reflector) is:</p> <pre><code>public class AProxy : A { private bool equalsHasBeenCalled; public override bool Equals(object obj) { if (base.equalsHasBeenCalled) { return base.Equals(obj); } base.equalsHasBeenCalled = true; return CaseInsensitiveComparer.Equals(this, obj); } } </code></pre> <p>..which of course throws a System.FieldAccessException (since no such member exists). The correct is to call <em>this.equalsHasBeenCalled</em> (not base.equalsHasBeenCalled).</p> <p>I am using the Reflection.Emit add-in for Reflector to generate the code (field1 is the FieldInfo for the "equalsHasBeenCalled" field):</p> <pre><code> // Writing body gen.Emit(OpCodes.Nop); // I suspect it has to be around here. gen.Emit(OpCodes.Ldarg_0); gen.Emit(OpCodes.Ldfld, field1); gen.Emit(OpCodes.Ldc_I4_0); gen.Emit(OpCodes.Ceq); gen.Emit(OpCodes.Stloc_1); gen.Emit(OpCodes.Ldloc_1); gen.Emit(OpCodes.Brtrue_S, label25); gen.Emit(OpCodes.Nop); gen.Emit(OpCodes.Ldarg_0); gen.Emit(OpCodes.Ldarg_1); gen.Emit(OpCodes.Call, method2); gen.Emit(OpCodes.Stloc_0); gen.Emit(OpCodes.Br_S, label42); gen.MarkLabel(label25); // ..and probably here also? gen.Emit(OpCodes.Ldarg_0); gen.Emit(OpCodes.Ldc_I4_1); gen.Emit(OpCodes.Stfld, field1); gen.Emit(OpCodes.Ldarg_0); gen.Emit(OpCodes.Ldarg_1); gen.Emit(OpCodes.Call, method3); gen.Emit(OpCodes.Stloc_0); gen.Emit(OpCodes.Br_S, label42); gen.MarkLabel(label42); gen.Emit(OpCodes.Ldloc_0); gen.Emit(OpCodes.Ret); </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USNikos Baxevanis
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POReflection.Emit code calls "base." instead of "this." on Boolean field
      1. This table or related slice is empty.
      1. VTUpMod
    1. COSo how do you see this output? Sounds like broken decompiler...
      singulars
      1. POReflection.Emit code calls "base." instead of "this." on Boolean field
      1. USleppie
    2. COWhy not show us your own code for Reflection.Emit?
      singulars
      1. POReflection.Emit code calls "base." instead of "this." on Boolean field
      1. USleppie
    3. COWhy dont you write what you need in C#, decompile to IL and see how it's set up? Also, if you need to do any more of things like this in your project, I suggest you look into Castle DynamicProxy.
      singulars
      1. POReflection.Emit code calls "base." instead of "this." on Boolean field
      1. USNikola Radosavljević
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload