11043: fix: fix incorrect mismatched argument count diagnostic with `std::arch` functions r=jonas-schievink a=jonas-schievink
Adds basic support for `#[rustc_legacy_const_generics]`.
Fixes https://github.com/rust-analyzer/rust-analyzer/issues/10009
Full support would involve actually checking call arguments against the right expected types.
bors r+
Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>
10872: ide_db: build symbol index from crate def map r=Veykril a=jhgg
fixes#4842, #10764
Is this looking correct? 👀
- [x] build the symbol index based upon the CrateDefMap for the given crate in `crate_symbols`
- [x] make it multi threaded again, and figure out how to cache each moduleid's symbol index in salsa.
- [x] NavigationTarget for names in macros is wrong, need to figure out how to compute a text range in the original file id?
- [x] cleanup some duped code
- [x] collect macros from `ItemScope.declared_macros()` into symbol index.
- [x] store declared macros in `ItemScope` so we can figure out where macros were defined for the index.
- [x] do something about `SymbolIndex::for_files` - ideally it should use the new module symbol index stuff.
- [x] delete `source_file_to_file_symbols` & co...
- [x] figure out what to do about `library_symbols`
- [x] maybe... speed up the new `library_symbols` - the new impl is probably much slower, and definitely much less parallel. **deciding to do nothing here, we can optimize later if necerssary.**
- [x] fix failing test: `navigation_target::tests::test_nav_for_symbol` - notably the crate def map doesn't seem to find declarations inside function.
- [x] now a bunch of other tests are failing around auto_import & qualify_path handlers. :(
- [x] need to assoc items in traits and impls
Co-authored-by: Jake Heinz <jh@discordapp.com>
The general problem we are dealing with here is this:
```
macro_rules! thrice {
($e:expr) => { $e * 3}
}
fn main() {
let x = thrice!(1 + 2);
}
```
we really want this to print 9 rather than 7.
The way rustc solves this is rather ad-hoc. In rustc, token trees are
allowed to include whole AST fragments, so 1+2 is passed through macro
expansion as a single unit. This is a significant violation of token
tree model.
In rust-analyzer, we intended to handle this in a more elegant way,
using token trees with "invisible" delimiters. The idea was is that we
introduce a new kind of parenthesis, "left $"/"right $", and let the
parser intelligently handle this.
The idea was inspired by the relevant comment in the proc_macro crate:
https://doc.rust-lang.org/stable/proc_macro/enum.Delimiter.html#variant.None
> An implicit delimiter, that may, for example, appear around tokens
> coming from a “macro variable” $var. It is important to preserve
> operator priorities in cases like $var * 3 where $var is 1 + 2.
> Implicit delimiters might not survive roundtrip of a token stream
> through a string.
Now that we are older and wiser, we conclude that the idea doesn't work.
_First_, the comment in the proc-macro crate is wishful thinking. Rustc
currently completely ignores none delimiters. It solves the (1 + 2) * 3
problem by having magical token trees which can't be duplicated:
* https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/TIL.20that.20token.20streams.20are.20magic
* https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Handling.20of.20Delimiter.3A.3ANone.20by.20the.20parser
_Second_, it's not like our implementation in rust-analyzer works. We
special-case expressions (as opposed to treating all kinds of $var
captures the same) and we don't know how parser error recovery should
work with these dollar-parenthesis.
So, in this PR we simplify the whole thing away by not pretending that
we are doing something proper and instead just explicitly special-casing
expressions by wrapping them into real `()`.
In the future, to maintain bug-parity with `rustc` what we are going to
do is probably adding an explicit `CAPTURED_EXPR` *token* which we can
explicitly account for in the parser.
If/when rustc starts handling delimiter=none properly, we'll port that
logic as well, in addition to special handling.
