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2396: Switch to variant-granularity field type inference r=flodiebold a=matklad
r? @flodiebold
Previously, we had a `ty` query for each field. This PR switcthes to a query per struct, which returns an `ArenaMap` with `Ty`s.
I don't know which approach is better. What is bugging me about the original approach is that, if we do all queries on the "leaf" defs, in practice we get a ton of queries which repeatedly reach into the parent definition to compute module, resolver, etc. This *seems* wasteful (but I don't think this is really what causes any perf problems for us).
At the same time, I've been looking at Kotlin, and they seem to use the general pattern of analyzing the *parent* definition, and storing info about children into a `BindingContext`.
I don't really which way is preferable. I think I want to try this approach, where query granularity generally mirrors the data granularity. The primary motivation for me here is probably just hope that we can avoid adding a ton of helpers to a `StructField`, and maybe in general avoid the need to switch to a global `StructField`, using `LocalStructFieldId` most of the time internally.
For external API (ie, for `ra_ide_api`), I think we should continue with fine-grained `StructField::ty` approach, which internally fetches the table for the whole struct and indexes into it.
In terms of actual memory savings, the results are as follows:
```
This PR:
142kb FieldTypesQuery (deps)
38kb FieldTypesQuery
Status Quo:
208kb TypeForFieldQuery (deps)
18kb TypeForFieldQuery
```
Note how the table itself occupies more than twice as much space! I don't have an explanation for this: a plausible hypothesis is that single-field structs are very common and for them the table is a pessimisation.
THere's noticiable wallclock time difference.
Co-authored-by: Aleksey Kladov <[email protected]>
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2387: Simplify r=matklad a=matklad
Co-authored-by: Aleksey Kladov <[email protected]>
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2381: Add proc-macro crate type handling r=JasperDeSutter a=JasperDeSutter
Resolves the libproc_macro crate in crates that are the proc-macro type.
This doesn't seem the ideal implementation though, since the compiler still requires you to write `extern crate proc_macro;` (even in 2018 edition).
Co-authored-by: JasperDeSutter <[email protected]>
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2383: Add alloc to the crate graph r=matklad a=marcogroppo
`alloc` has been added to the crate graph.
Completions work, but they are available even when the user has **not** declared an `extern crate alloc`. Is this the correct approach?
Fixes #2376.
Co-authored-by: Marco Groppo <[email protected]>
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2378: Fix panic in batch analysis r=matklad a=matklad
Co-authored-by: Aleksey Kladov <[email protected]>
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Closes #2272
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2365: Make expand-macro more flexible r=matklad a=edwin0cheng
Due to lack of implementation or other types of errors, some macros do not expand correctly in the current situation. The PR attempts to make `expand-macro` more flexible in error situations by ignoring internal failed macro expansion.
Co-authored-by: Edwin Cheng <[email protected]>
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2343: implement assist invert_if r=matklad a=bravomikekilo
fix [issue 2219 invert if condition](https://github.com/rust-analyzer/rust-analyzer/issues/2219)
I put the assist cursor range to `if` of the if expression, because both condition and body will be replaced. Is there any way to replace them without cover the cursor position?
@matklad
Co-authored-by: bravomikekilo <[email protected]>
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2360: Refactor builtin macro r=matklad a=edwin0cheng
Refactor builtin macro and add some local tests.
Co-authored-by: Edwin Cheng <[email protected]>
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