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We don't have LifetimeParam yet, but they are planned!
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This makes `hir_def::GenericParams` flatter. The logic for
re-numbering the params is moved to hir instead.
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2484: DynMap r=matklad a=matklad
Implement a `DynMap` a semi-dynamic, semi-static map, which helps to thread heterogeneously typed info in a uniform way. Totally inspired by https://github.com/JetBrains/kotlin/blob/df3bee30384787d8951ea548a4257c2cb52a16a3/compiler/frontend/src/org/jetbrains/kotlin/resolve/BindingContext.java.
@flodiebold wdyt? Seems like a potentially useful pattern for various source-map-like things.
Co-authored-by: Aleksey Kladov <[email protected]>
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This might, or might not help us to reduce boilerplate associated with
plumbing values from analysis to the IDE layer
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2481: Remove obsolete comment r=matklad a=matklad
Co-authored-by: Aleksey Kladov <[email protected]>
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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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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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2418: Hide MacroCallLoc outside hir_expand r=matklad a=edwin0cheng
This PR refactor `MacroCallLoc` such that it be hided to become implementation details of hir_expand.
Co-authored-by: Edwin Cheng <[email protected]>
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2406: Add hygiene information to SourceAnalyzer r=matklad a=edwin0cheng
This should fix https://github.com/rust-analyzer/rust-analyzer/pull/2392#issuecomment-557964686
Co-authored-by: Edwin Cheng <[email protected]>
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It should provide a convenient API over more low-level Ty
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