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2479: Add expansion infrastructure for derive macros r=matklad a=flodiebold
I thought I'd experiment a bit with attribute macro/derive expansion, and here's what I've got so far. It has dummy implementations of the Copy / Clone derives, to show that the approach works; it doesn't add any attribute macro support, but I think that fits into the architecture.
Basically, during raw item collection, we look at the attributes and generate macro calls for them if necessary. Currently I only do this for derives, and just add the derive macro calls as separate calls next to the item. I think for derives, it's important that they don't obscure the actual item, since they can't actually change it (e.g. sending the item token tree through macro expansion unnecessarily might make completion within it more complicated).
Attribute macros would have to be recognized at that stage and replace the item (i.e., the raw item collector will just emit an attribute macro call, and not the item). I think when we implement this, we should try to recognize known inert attributes, so that we don't do macro expansion unnecessarily; anything that isn't known needs to be treated as a possible attribute macro call (since the raw item collector can't resolve the macro yet).
There's basically no name resolution for attribute macros implemented, I just hardcoded the built-in derives. In the future, the built-ins should work within the normal name resolution infrastructure; the problem there is that the builtin stubs in `std` use macros 2.0, which we don't support yet (and adding support is outside the scope of this).
One aspect that I don't really have a solution for, but I don't know how important it is, is removing the attribute itself from its input. I'm pretty sure rustc leaves out the attribute macro from the input, but to do that, we'd have to create a completely new syntax node. I guess we could do it when / after converting to a token tree.
Co-authored-by: Florian Diebold <[email protected]>
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Since as long as we're not implementing the bodies, they all work the same way.
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token tree
Otherwise parsing them again doesn't work.
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2471: Add `ModuleItemsOwner` to `Block` r=matklad a=ice1000
As title
Co-authored-by: ice1000 <[email protected]>
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The stand-alone `unify` requires that the type doesn't contain any type
variables. So we can't share the code here for now (without more refactoring)...
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2465: Extract built-in trait implementations to separate module r=matklad a=flodiebold
This untangles the builtin logic from the Chalk translation.
Co-authored-by: Florian Diebold <[email protected]>
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This untangles the builtin logic from the Chalk translation.
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2018: assists: add assist for custom implementation for derived trait r=matklad a=paulolieuthier
Please, tell me if something could be more idiomatic or efficient.
Fixes #1256.
Co-authored-by: Paulo Lieuthier <[email protected]>
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2455: Add BuiltinShadowMode r=flodiebold a=edwin0cheng
This PR try to fix #1905 by introduce an `BuiltinShadowMode` in name resolving functions.
cc @flodiebold
Co-authored-by: Edwin Cheng <[email protected]>
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2451: Use env_logger instead of flexi_logger r=matklad a=AlexanderEkdahl
This fixes https://github.com/rust-analyzer/rust-analyzer/issues/2335
- By default only `error` will be printed. From what I can tell this matches the current behaviour. Configured through `RUST_LOG`.
- I looked through the optional dependencies for `env_logger`and I have only enabled `human_time`. Without this feature no timestamp will be shown for log messages.
- `RA_LOG_DIR` feature is removed
This PR adds 2 new dependencies(`env_logger` and `human_time`) and removes 6 dependencies.
Co-authored-by: Alexander Ekdahl <[email protected]>
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- impl Trait<Self> for S is allowed
- impl Trait for S<Self> is an invalid cycle, but we can add cycle recovery for
it in Salsa now
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2449: Only allow renames to valid identifiers r=matklad a=detrumi
Implements #2121
Co-authored-by: Wilco Kusee <[email protected]>
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