LibJS+LibWeb: Implement WebAssembly Native Errors

[networkException]

This pull request adds the CompileError, RuntimeError and LinkError native errors and exposes them on the WebAssembly object.

Initially I tried defining the errors outside LibJS, this however is non trivial as both we and the spec rely (?) on intrinsics knowing about them.

[networkException]

Ah I wasn't aware of the strict spec isolation (but it makes a whole lot of sense obviously). Sadly I don't really know where to begin with changing the architecture to support non LibJS native errors.

[alimpfard]

You can look at how the various DOMExceptions are currently implemented, these basically follow the same concept.

looks like they're just PlatformObjects now: https://github.com/SerenityOS/serenity/blob/master/Userland/Libraries/LibWeb/DOM/DOMException.h

[linusg]

These are different though and explicitly not platform objects, only things defined via WebIDL are.

They implement the NativeError object structure from ES, as described in the spec I linked. You might be able to use the existing DECLARE_NATIVE_ERROR macros for this.

[networkException]

Right, I tried using DECLARE_NATIVE_ERROR{,_CONSTRUCTOR,_PROTOTYPE} initially.

However implementing ConstructorName::construct requires ordinary_create_from_constructor which isn't really designed to take host specific prototypes:

• The spec defines "Assert: intrinsicDefaultProto is this specification's name of an intrinsic object" as a step and

• we require a member of Intrinsics to be passed.

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

[AtkinsSJ]

This has conflicts.

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

[stale[bot]]

This pull request has been closed because it has not had recent activity. Feel free to re-open if you wish to still contribute these changes. Thank you for your contributions!