On 22/06/2021 23:51, Mark Wielaard wrote: > Hi, > > I was looking into https://github.com/Rust-GCC/gccrs/issues/511 "rust > has two kinds of integer literal" Which explains that integer literals > used for a tuple index are not general integer literals. > > First I wanted to write some tests, and started with some constructs > that should pass. But some don't. In particular the empty tuple struct > isn't recognized, and the struct name path lookup doesn't work when > initializing the tuple struct. > > tuple_index.rs:16:12: error: unrecognised token ‘)’ in type > 16 | struct E(); > | ^ > tuple_index.rs:16:12: error: could not parse type in tuple struct field > > tuple_index.rs:20:12: error: unknown root segment in path O lookup O > 20 | let so = O(0); > | ^ > tuple_index.rs:24:12: error: unknown root segment in path T lookup T > 24 | let st = T(0,1); > | ^ > tuple_index.rs:28:12: error: unknown root segment in path M lookup M > 28 | let sm = M(0,1,2,3,4,5,6,7,8,9,10); > | ^ > > I haven't had time to try to resolve these issues, but wanted to > report them. > > Finally, the The Rust Reference says "A tuple index is used to refer > to the fields of tuples, tuple structs, and tuple variants." I don't > understand how this would work for tuple variants. Does anybody have > an example of how to refer to a tuple variant so a tuple index can be > used on it? > > Cheers, > > Mark > Hi Mark,
Good find, I have raised https://github.com/Rust-GCC/gccrs/issues/519. From the top of my head I think there are a few issues going on. 1. The parser is not able to parse the structure definitions within a block properly. 2. The knock on is that the name resolution and type resolution will need updated to handle this. I think I might take a quick look into this one today I want to double check a few things as it may have a knock on as to what I am working on. If i make any progress I will update the ticket and let you know here. Thanks, --Phil
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