syn | zero dependency R package that lists synonyms | Development Tools library

But for this particular question, what am I doing wrong?

x.tree is of type UseTree which is an enum:

Markdig.Syntax.Inlines.LinkInline itself implements IEnumerable, which cause Format-List to enumerate it and report the properties of the enumerated elements, even when passed via -InputObject.

Specifically, it enumerates the instance's one child element, which is of type Markdig.Syntax.Inlines.LiteralInline, and its properties are being displayed.

To prevent this enumeration, i.e. to see the properties of the instance itself, you must wrap it in an aux. single-element array:

I do not have a lot of experience using proc_macro, but based on this answer I found it was easy to adapt it to manually replace literals in the token tree without the use of the syn or quote crates. This approach involved using the litrs crate to separate out the types of literals.

There is a significance to when the Lookahead1 is created: it points to the location where the cursor was at the call to lookahead1(). Lookahead1 is meant to use when you have a list of possible values, and you want to provide a nice error message when the value is invalid, listing all possible values. If you just want to peek the next token, use ParseBuffer::peek():

@jakub's solution ended up solving the problem for me. I uninstalled the version of rust that was installed through pacman. To replace it, I installed rustup and then using rustup, installed the latest nightly version of rust (1.60). Once I did that, installing the cryptography package worked just fine.

If you are using rustup, just make sure that you add ~/.cargo/bin to your PATH before installation. Also, the command I used to install rust through rustup was rustup toolchain install nightly.

Add trait bounds and/or static assertions to the generated code. Macros run before type information is available since they can affect type information.

It looks like the executable is actually named x86_64-linux-gnu-gcc, see https://packages.debian.org/bullseye/arm64/gcc-x86-64-linux-gnu/filelist.

If you are going to use PACKET_TX_RING, then you must play by its rules: that means you can't use the same buffer spot over and over: you must advance to the next buffer location within the ring buffer: build the first packet in slot 0, the second in slot 1, etc. (wrapping when you get to the end of the buffer).

But you're building every packet in slot 0 (i.e. at ps_header_start) but after sending the first packet, the kernel is expecting the next frame in the subsequent slot. It will never find the (second) packet you created in slot 0 until it has processed all the other slots. But it's looking at slot 1 and seeing that the tp_status in that slot hasn't been set to TP_STATUS_SEND_REQUEST yet so... nothing to do.

Note that your sendto call is not providing a buffer address to the kernel. That's because the kernel knows where the next packet will come from, it must be in the next slot in the ring buffer following the one you just sent.

This is why I suggested in your other question that you not use PACKET_TX_RING unless you really need it: it's more complicated to do correctly. It's much easier to just create your frame in a static buffer and call sendto(fd, buffer_address, buffer_len, ...). And if you are going to call sendto for each created frame, there is literally no advantage to using PACKET_TX_RING anyway.

You can use .map() and a dict like so: