format/format_entries does not work with a template with non-type values (and an @)

Originally reported here: https://github.com/WerWolv/ImHex-Patterns/issues/147 - but closed due to wrong repository.

Consider the following file:

10 00 00 00 18 00 00 00 04 00 00 00 FF FF FF FF FF FF FF FF FF FF FF FF 74 65 73 74 31 32 33 34 35 6C 6F 6C 31 33 33 37 08 00 00 00 04 00 00 00 0C 00 00 00 05 00 00 00 11 00 00 00 03 00 00 00 14 00 00 00 04 00 00 00

test.zip

With the following pattern:

fn entryName(auto e) {    
    return e.name;
};

struct Entry<auto offset> {
    u32 nameOffset;
    u32 nameSize;
    char name[nameSize] @ offset + nameOffset;
}/*[[format("entryName")]]*/;

struct Header {
    u32 blockOffset;
    u32 nameBlockSize;
    u32 numberOfElements;
    
    Entry<blockOffset> entries[numberOfElements] 
        @ blockOffset + nameBlockSize
        //[[format_entries("entryName")]]
        ;
};

Header header @ 0x0;

Basically, this file requires the entry to know where the lookup table for the strings is located. I've used a template for that. The original issue was about not being to use a template in a format-function, but auto solves that. However, this particular file and pattern causes an error[E0011] when you try to use either of the format attributes.

I'm pretty sure it's related to the @ sign throwing things off.

Reproduce the error using the supplied test.zip and pattern, focusing on format and format_entries with the templated Entry and @ expressions. Trace the handling of these format attributes and confirm done when both attributes work without error[E0011] for this example.