问题
I'm using System.Reflection.Emit for a while now, and find it (who don't?) as painful as bug prone.
Do you know if there is a good wrapper around the IL Generator, something that I can rely on to emit IL in a more safe and easier manner than with playing directly with SRE?
Edit:
I know that manipulating expression trees is definitively easier and safer than emitting IL directly, but they also have some constraints right now. I can't create code blocs, use loops, declare and work with several locals, etc. We need to wait until .NET 4 comes out :)
Moreover, I'm dealing with a code base which already relies on SRE.
Obviously, ILGenerator do everything I need. But I would appreciate more assistance when manipulating it. When I'm referring to a ILGenerator wrapper, which remains at a pretty low level, I think about something which could provide methods like:
// Performs a virtual or direct call on the method, depending if it is a
// virtual or a static one.
Call(MethodInfo methodInfo)
// Pushes the default value of the type on the stack, then emit
// the Ret opcode.
ReturnDefault(Type type)
// Test the object type to emit the corresponding push
// opcode (Ldstr, Ldc_I*, Ldc_R*, etc.)
LoadConstant(object o)
It's really 3 naive examples, but it could be enough to demonstrate what I expect. We can see that as a set of extension methods, but it could be nice to have support for conditional statements and loops like in RunSharp. In fact, RunSharp is pretty close that what I want, but it abstracts the ILGenerator too much and doesn't expose all its functionality.
I can't remember where, but I already saw such an helper in an open source project.
回答1:
If you're using .NET 3.5, you may find using Expression Trees to be more reasonable. It entirely depends on what you're doing - and it can still be quite painful - but it's certainly another option to be aware of.
回答2:
[updated]: I thought of the name ;-p RunSharp. I can't vouch for it, but it might be what you need.
However; what do you need to generate? CodeDom is one option. For creating methods, you might find that you can do a lot more than you expect with the Expression class in .NET 3.5 (after compiling it to a typed delegate via Expression.Lambda/Compile.
回答3:
Try using Mono.Cecil
Cecil is a library written by Jb Evain to generate and inspect programs and libraries in the ECMA CIL format. It has full support for generics, and support some debugging symbol format.
来源:https://stackoverflow.com/questions/197005/is-there-a-good-wrapper-around-ilgenerator