Metadata is always ignored. It's purely for documentation purposes. But
as long as Mu has no named constants it's starting to feel increasingly
essential.
I'm still not going to bother to add metadata to other parts of the language.
Let's see if we need them. Even though it's a little warty that the rules
vary throughout the stack:
- bare SubX: metadata everywhere
- SubX with syntax sugar: no metadata in calls or addressing-mode sigil-expressions
- Mu: metadata only for literal integers
I've found two bugs in SubX libraries:
1. next-word had an out-of-bounds read
2. next-word was skipping comments, because that's what I need during bootstrapping.
I've created a new variant called next-raw-word that doesn't skip comments.
These really need better names.
We're now at the point where 4b.mu has the right structure and returns
identical result to 4a.mu.
Without this there's no way to convert an int to a byte. And that feels
too restrictive, and gives up a lot of safe things one might want to do
with bytes. (Such as divide a number by 10 and emit the remainder as a
byte.)
Both manual tests described in commit 7222 now work.
To make them work I had to figure out how to copy a file. It
requires a dependency on a new syscall: lseek.
We can copy non-zero literals only to non-addr non-offset scalars.
This change is surprisingly short for the magnitude of the limb I felt
myself going out on for it. Surprising that there were no unpleasant discoveries.
More bugfixes, now all apps are working.
In the process of fixing the bugs in translating apps/browse, I found a
typo in apps/tile that just happened to accidentally be compiling fine.
