Added wildcard node input support to back-end

[shadownetdev1]

ComfyUI's front-end supports wildcard inputs but the back-end had no way to hand nodes with wildcard inputs. This pull request changes a single line and allows a node to have an type_input of * that matches all other type inputs.

[shadownetdev1]

I will have to do some testing, but I don't think wildcard output will have many benefits. I'm pretty sure that you can already define any type you want as an output type. So, hypothetically a wildcard node could define the output "*" with the type "*" this would only be readable by other nodes with a wildcard input type. This is probably what you want because a non wildcard node is going to have no understanding of a wildcard output type. There may be a way to implement it that makes sense (maybe detect the actual type of input and automatically change the output type?), but this would probably require edits to both the front and back end and is beyond my current understanding of ComfyUI's internal code

[ltdrdata]

I will have to do some testing, but I don't think wildcard output will have many benefits. I'm pretty sure that you can already define any type you want as an output type. So, hypothetically a wildcard node could define the output "" with the type "" this would only be readable by other nodes with a wildcard input type. This is probably what you want because a non wildcard node is going to have no understanding of a wildcard output type. There may be a way to implement it that makes sense (maybe detect the actual type of input and automatically change the output type?), but this would probably require edits to both the front and back end and is beyond my current understanding of ComfyUI's internal code

In fact, I use a lot of wildcard input/output in my custom. Typically, wildcard output is often used to pass through the incoming wildcard input as it is.

You can see an example of me using wildcard input/output here: https://github.com/comfyanonymous/ComfyUI/pull/731/files#diff-b1b2602f05d913fdc42d02d8ed132d1d6b4ed0cfcd5ae9b4d048637f4f27f3d5R77

[ali1234]

Today I independently discovered this problem/fix with the custom node lib mentioned above. There is also an open issue here relating to it: https://github.com/comfyanonymous/ComfyUI/issues/257