C# array at runtime using emit

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Hi all im working on a C# compiler and i've reached this far that i have to make arrays. now i've tried opcodes.newarr and that works somewhat fine but my problem is that i would like to emit a array at type [,] and not[][] and have there by moved on to opcodes.newobj but somehow i cant make it work :(

The reason is i wanna use newobj over newarr is that i wanna make lets say 8 dimentional arrays (just to be over rated :p) even that you rarely would use more than 3 but i wanna be safe that if some ever would make such big array it is possible.

what i have so far is on the parser is:

C#

Arrays a = new Arrays(); //Arrays is a class with "Array" in it
a.array = Array.CreateInstance(value, dimensionsize.ToArray()); //value is a system.type and dimensiomsize is a list where all int array leght is so if it have 4 values and value is of type int the array type is int[,,,]

And the codegenerator:

C#

il.Emit(OpCodes.Newobj, typeof(array)); //the "array" is the stored declared array from above

i've also stored the array in a localbuilder with ident etc. so im very sure its the emiter im doing something wrong at...

If someone could help me out i would be happy :) thanks - Jackie

Posted 18-Apr-12 9:27am

Jackie00100

Updated 18-Apr-12 9:44am

v3

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2 solutions

Solution 1

If I understand what you want to do, I do not beleive it is possible. What you want to do is similar to jagged arrays: http://msdn.microsoft.com/en-us/library/2s05feca.aspx[^]

Posted 18-Apr-12 12:09pm

Clifford Nelson

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Jackie00100 · Accepted Answer · 2012-04-18T22:23:00

I made a few addition to my Arrays and added this code in the codegenerator and it works just fine now :)

C#

Arrays arr = (Arrays)value;
deliveredType = arr.array.GetType();
Type myType = arr.array.GetType();
Type[] types = new Type[arr.dimensions.Length];
for (int i = 0; i < arr.dimensions.Length; i++)
{
    types[i] = arr.type;
    il.Emit(OpCodes.Ldc_I4, arr.dimensions[i]);
}

ConstructorInfo constructorInfoObj = myType.GetConstructor(types);


il.Emit(OpCodes.Newobj, constructorInfoObj);