This invokes clippy as part of `make check` now, which I had previously
avoided doing (I'll elaborate on that below).
This commit represents the changes needed to resolve all the warnings
presented by clippy. Many changes have been made where I find the lints to
be useful and agreeable, but there are a number of lints, rationalized in
`src/lib.rs`, where I found the lints to be disagreeable. I have provided
rationale, primarily for those wondering why I desire to deviate from the
default lints, though it does feel backward to rationalize why certain lints
ought to be applied (the reverse should be true).
With that said, this did catch some legitimage issues, and it was also
helpful in getting some older code up-to-date with new language additions
that perhaps I used in new code but hadn't gone back and updated old code
for. My goal was to get clippy working without errors so that, in the
future, when others get into TAMER and are still getting used to Rust,
clippy is able to help guide them in the right direction.
One of the reasons I went without clippy for so long (though I admittedly
forgot I wasn't using it for a period of time) was because there were a
number of suggestions that I found disagreeable, and I didn't take the time
to go through them and determine what I wanted to follow. Furthermore, it
was hard to make that judgment when I was new to the language and lacked
the necessary experience to do so.
One thing I would like to comment further on is the use of `format!` with
`expect`, which is also what the diagnostic system convenience methods
do (which clippy does not cover). Because of all the work I've done trying
to understand Rust and looking at disassemblies and seeing what it
optimizes, I falsely assumed that Rust would convert such things into
conditionals in my otherwise-pure code...but apparently that's not the case,
when `format!` is involved.
I noticed that, after making the suggested fix with `get_ident`, Rust
proceeded to then inline it into each call site and then apply further
optimizations. It was also previously invoking the thread lock (for the
interner) unconditionally and invoking the `Display` implementation. That
is not at all what I intended for, despite knowing the eager semantics of
function calls in Rust.
Anyway, possibly more to come on that, I'm just tired of typing and need to
move on. I'll be returning to investigate further diagnostic messages soon.
This exposes the internal rendering of `ListDisplayWrapper::fmt` such that
we can output a list without actually creating a list. This is used in an
upcoming change for =ele_parse!= so that Sum NTs can render the union of all
the QNames that their constituent NTs match on, recursively, as a single
list, without having to create an ephemeral collection only for display.
If Rust supports const functions for arrays/Vecs in the future, we could
generate this at compile-time, if we were okay with the (small) cost, but
this solution seems just fine. But output may be even _more_ performant
since they'd all be adjacent in memory.
This is used in these secenarios:
1. Diagnostic messages;
2. Error messages (overlaps with #1); and
3. `Display::fmt` of the `ParseState`s themselves.
The reason that we want this to be reasonably performant is because #3
results in a _lot_ of output---easily GiB of output depending on what is
being traced. Adding heap allocations to this would make it even slower,
since a description is generated for each individual trace.
Anyway, this is a fairly simple solution, albeit a little bit less clear,
and only came after I had tried a number of other different approaches
related to recursively constructing QName lists at compile time; they
weren't worth the effort when this was so easy to do.
DEV-7145
This begins generating parsers that are capable of parsing elements. I need
to move on, so this abstraction isn't going to go as far as it could, but
let's see where it takes me.
This was the work that required the recent lookahead changes, which has been
detailed in previous commits.
This initial support is basic, but robust. It supports parsing elements
with attributes and children, but it does not yet support the equivalent of
the Kleene star (`*`). Such support will likely be added by supporting
parsers that are able to recurse on their own definition in tail position,
which will also require supporting parsers that do not add to the stack.
This generates parsers that, like all the other parsers, use enums to
provide a typed stack. Stitched parsers produce a nested stack that is
always bounded in size. Fortunately, expressions---which can nest
deeply---do not need to maintain ancestor context on the stack, and so this
should work fine; we can get away with this because XIRF ensures proper
nesting for us. Statements that _do_ need to maintain such context are not
nested.
This also does not yet support emitting an object on closing tag, which
will be necessary for NIR, which will be a streaming IR that is "near" to
the source XML in structure. This will then be used to lower into AIR for
the ASG, which gives structure needed for further analysis.
More information to come; I just want to get this committed to serve as a
mental synchronization point and clear my head, since I've been sitting on
these changes for so long and have to keep stashing them as I tumble down
rabbit holes covered in yak hair.
DEV-7145
This is partly an experiment, but is designed to simplify producing English
sentences in various contexts. It makes use of a not only unstable, but
incomplete, Rust feature---adt_const_params, for a static str const type
parameter. Hopefully that ends up being stabalized.
This uses types, but it's the same as function composition due to Rust's
monomorphization.
DEV-7145
Mike Gerwitz