language-servers/rust-analyzer
1
0
Fork 0
mirror of https://github.com/rust-lang/rust-analyzer.git synced 2025-09-28 12:54:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Build source map for hir_def::TypeRefs

Browse source 
So that given a `TypeRef` we will be able to trace it back to source code.

This is necessary to be able to provide diagnostics for lowering to chalk tys, since the input to that is `TypeRef`.

This means that `TypeRef`s now have an identity, which means storing them in arena and not interning them, which is an unfortunate (but necessary) loss but also a pretty massive change. Luckily, because of the separation layer we have for IDE and HIR, this change never crosses the IDE boundary.
This commit is contained in:
Chayim Refael Friedman 2024-09-06 16:25:22 +03:00
parent 6a67a4d3cd
commit 89c0ffa6b0
40 changed files with 1712 additions and 778 deletions
Download patch file Download diff file Expand all files Collapse all files

28
crates/hir-def/src/path.rs
View file

@ -9,7 +9,7 @@ use std::{
use crate::{
lang_item::LangItemTarget,
lower::LowerCtx,
type_ref::{ConstRef, LifetimeRef, TypeBound, TypeRef},
type_ref::{ConstRef, LifetimeRef, TypeBound, TypeRefId},
};
use hir_expand::name::Name;
use intern::Interned;
@ -51,10 +51,10 @@ pub enum Path {
Normal {
/// Type based path like `<T>::foo`.
/// Note that paths like `<Type as Trait>::foo` are desugared to `Trait::<Self=Type>::foo`.
type_anchor: Option<Interned<TypeRef>>,
type_anchor: Option<TypeRefId>,
mod_path: Interned<ModPath>,
/// Invariant: the same len as `self.mod_path.segments` or `None` if all segments are `None`.
generic_args: Option<Box<[Option<Interned<GenericArgs>>]>>,
generic_args: Option<Box<[Option<GenericArgs>]>>,
},
/// A link to a lang item. It is used in desugaring of things like `it?`. We can show these
/// links via a normal path since they might be private and not accessible in the usage place.
@ -86,20 +86,20 @@ pub struct AssociatedTypeBinding {
pub name: Name,
/// The generic arguments to the associated type. e.g. For `Trait<Assoc<'a, T> = &'a T>`, this
/// would be `['a, T]`.
pub args: Option<Interned<GenericArgs>>,
pub args: Option<GenericArgs>,
/// The type bound to this associated type (in `Item = T`, this would be the
/// `T`). This can be `None` if there are bounds instead.
pub type_ref: Option<TypeRef>,
pub type_ref: Option<TypeRefId>,
/// Bounds for the associated type, like in `Iterator<Item:
/// SomeOtherTrait>`. (This is the unstable `associated_type_bounds`
/// feature.)
pub bounds: Box<[Interned<TypeBound>]>,
pub bounds: Box<[TypeBound]>,
}
/// A single generic argument.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum GenericArg {
Type(TypeRef),
Type(TypeRefId),
Lifetime(LifetimeRef),
Const(ConstRef),
}
@ -114,7 +114,7 @@ impl Path {
/// Converts a known mod path to `Path`.
pub fn from_known_path(
path: ModPath,
generic_args: impl Into<Box<[Option<Interned<GenericArgs>>]>>,
generic_args: impl Into<Box<[Option<GenericArgs>]>>,
) -> Path {
let generic_args = generic_args.into();
assert_eq!(path.len(), generic_args.len());
@ -137,9 +137,9 @@ impl Path {
}
}
pub fn type_anchor(&self) -> Option<&TypeRef> {
pub fn type_anchor(&self) -> Option<TypeRefId> {
match self {
Path::Normal { type_anchor, .. } => type_anchor.as_deref(),
Path::Normal { type_anchor, .. } => *type_anchor,
Path::LangItem(..) => None,
}
}
@ -178,7 +178,7 @@ impl Path {
return None;
}
let res = Path::Normal {
type_anchor: type_anchor.clone(),
type_anchor: *type_anchor,
mod_path: Interned::new(ModPath::from_segments(
mod_path.kind,
mod_path.segments()[..mod_path.segments().len() - 1].iter().cloned(),
@ -204,7 +204,7 @@ pub struct PathSegment<'a> {
pub struct PathSegments<'a> {
segments: &'a [Name],
generic_args: Option<&'a [Option<Interned<GenericArgs>>]>,
generic_args: Option<&'a [Option<GenericArgs>]>,
}
impl<'a> PathSegments<'a> {
@ -224,7 +224,7 @@ impl<'a> PathSegments<'a> {
pub fn get(&self, idx: usize) -> Option<PathSegment<'a>> {
let res = PathSegment {
name: self.segments.get(idx)?,
args_and_bindings: self.generic_args.and_then(|it| it.get(idx)?.as_deref()),
args_and_bindings: self.generic_args.and_then(|it| it.get(idx)?.as_ref()),
};
Some(res)
}
@ -244,7 +244,7 @@ impl<'a> PathSegments<'a> {
self.segments
.iter()
.zip(self.generic_args.into_iter().flatten().chain(iter::repeat(&None)))
.map(|(name, args)| PathSegment { name, args_and_bindings: args.as_deref() })
.map(|(name, args)| PathSegment { name, args_and_bindings: args.as_ref() })
}
}