Unnamed repository; edit this file 'description' to name the repository.
Merge pull request #18541 from ChayimFriedman2/different-generic-args
feat: Complete diagnostics in ty lowering groundwork and serve a first diagnostic 🎉
34 files changed, 1549 insertions, 233 deletions
diff --git a/Cargo.lock b/Cargo.lock index 2bd4d17fe2..5861833d53 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -509,6 +509,7 @@ dependencies = [ "base-db", "cfg", "either", + "expect-test", "hir-def", "hir-expand", "hir-ty", @@ -519,6 +520,9 @@ dependencies = [ "span", "stdx", "syntax", + "syntax-bridge", + "test-fixture", + "test-utils", "tracing", "triomphe", "tt", diff --git a/crates/hir-def/src/body.rs b/crates/hir-def/src/body.rs index d4a1120908..867bee95be 100644 --- a/crates/hir-def/src/body.rs +++ b/crates/hir-def/src/body.rs @@ -31,7 +31,7 @@ use crate::{ path::{ModPath, Path}, src::HasSource, type_ref::{TypeRef, TypeRefId, TypesMap, TypesSourceMap}, - BlockId, DefWithBodyId, HasModule, Lookup, + BlockId, DefWithBodyId, HasModule, Lookup, SyntheticSyntax, }; /// A wrapper around [`span::SyntaxContextId`] that is intended only for comparisons. @@ -141,7 +141,7 @@ pub struct BodySourceMap { field_map_back: FxHashMap<ExprId, FieldSource>, pat_field_map_back: FxHashMap<PatId, PatFieldSource>, - types: TypesSourceMap, + pub types: TypesSourceMap, // FIXME: Make this a sane struct. template_map: Option< @@ -160,9 +160,6 @@ pub struct BodySourceMap { diagnostics: Vec<BodyDiagnostic>, } -#[derive(Default, Debug, Eq, PartialEq, Clone, Copy)] -pub struct SyntheticSyntax; - #[derive(Debug, Eq, PartialEq)] pub enum BodyDiagnostic { InactiveCode { node: InFile<SyntaxNodePtr>, cfg: CfgExpr, opts: CfgOptions }, diff --git a/crates/hir-def/src/data.rs b/crates/hir-def/src/data.rs index 2a13f74aac..15dd6aba31 100644 --- a/crates/hir-def/src/data.rs +++ b/crates/hir-def/src/data.rs @@ -369,7 +369,7 @@ impl ImplData { let item_tree = tree_id.item_tree(db); let impl_def = &item_tree[tree_id.value]; - let target_trait = impl_def.target_trait.clone(); + let target_trait = impl_def.target_trait; let self_ty = impl_def.self_ty; let is_negative = impl_def.is_negative; let is_unsafe = impl_def.is_unsafe; diff --git a/crates/hir-def/src/generics.rs b/crates/hir-def/src/generics.rs index 11e9bb0d88..7b3f1d06d2 100644 --- a/crates/hir-def/src/generics.rs +++ b/crates/hir-def/src/generics.rs @@ -26,8 +26,8 @@ use crate::{ nameres::{DefMap, MacroSubNs}, path::{AssociatedTypeBinding, GenericArg, GenericArgs, NormalPath, Path}, type_ref::{ - ArrayType, ConstRef, FnType, LifetimeRef, RefType, TypeBound, TypeRef, TypeRefId, TypesMap, - TypesSourceMap, + ArrayType, ConstRef, FnType, LifetimeRef, PathId, RefType, TypeBound, TypeRef, TypeRefId, + TypesMap, TypesSourceMap, }, AdtId, ConstParamId, GenericDefId, HasModule, ItemTreeLoc, LifetimeParamId, LocalLifetimeParamId, LocalTypeOrConstParamId, Lookup, TypeOrConstParamId, TypeParamId, @@ -225,6 +225,11 @@ impl GenericParams { } #[inline] + pub fn no_predicates(&self) -> bool { + self.where_predicates.is_empty() + } + + #[inline] pub fn where_predicates(&self) -> std::slice::Iter<'_, WherePredicate> { self.where_predicates.iter() } @@ -874,14 +879,20 @@ fn copy_type_bound( to: &mut TypesMap, to_source_map: &mut TypesSourceMap, ) -> TypeBound { + let mut copy_path_id = |path: PathId| { + let new_path = copy_path(&from[path], from, from_source_map, to, to_source_map); + let new_path_id = to.types.alloc(TypeRef::Path(new_path)); + if let Some(&ptr) = from_source_map.types_map_back.get(path.type_ref()) { + to_source_map.types_map_back.insert(new_path_id, ptr); + } + PathId::from_type_ref_unchecked(new_path_id) + }; + match bound { - TypeBound::Path(path, modifier) => { - TypeBound::Path(copy_path(path, from, from_source_map, to, to_source_map), *modifier) + &TypeBound::Path(path, modifier) => TypeBound::Path(copy_path_id(path), modifier), + TypeBound::ForLifetime(lifetimes, path) => { + TypeBound::ForLifetime(lifetimes.clone(), copy_path_id(*path)) } - TypeBound::ForLifetime(lifetimes, path) => TypeBound::ForLifetime( - lifetimes.clone(), - copy_path(path, from, from_source_map, to, to_source_map), - ), TypeBound::Lifetime(lifetime) => TypeBound::Lifetime(lifetime.clone()), TypeBound::Use(use_args) => TypeBound::Use(use_args.clone()), TypeBound::Error => TypeBound::Error, diff --git a/crates/hir-def/src/hir/type_ref.rs b/crates/hir-def/src/hir/type_ref.rs index 4d83ef99c8..6d4d519cd2 100644 --- a/crates/hir-def/src/hir/type_ref.rs +++ b/crates/hir-def/src/hir/type_ref.rs @@ -23,6 +23,7 @@ use crate::{ hir::Literal, lower::LowerCtx, path::{GenericArg, Path}, + SyntheticSyntax, }; #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)] @@ -91,19 +92,37 @@ impl Rawness { } } -#[derive(Clone, PartialEq, Eq, Hash, Debug)] +#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)] +/// A `TypeRefId` that is guaranteed to always be `TypeRef::Path`. We use this for things like +/// impl's trait, that are always paths but need to be traced back to source code. +pub struct PathId(TypeRefId); + +impl PathId { + #[inline] + pub fn from_type_ref_unchecked(type_ref: TypeRefId) -> Self { + Self(type_ref) + } + + #[inline] + pub fn type_ref(self) -> TypeRefId { + self.0 + } +} + +#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)] pub struct TraitRef { - pub path: Path, + pub path: PathId, } impl TraitRef { /// Converts an `ast::PathType` to a `hir::TraitRef`. pub(crate) fn from_ast(ctx: &mut LowerCtx<'_>, node: ast::Type) -> Option<Self> { // FIXME: Use `Path::from_src` - match node { - ast::Type::PathType(path) => { - path.path().and_then(|it| ctx.lower_path(it)).map(|path| TraitRef { path }) - } + match &node { + ast::Type::PathType(path) => path + .path() + .and_then(|it| ctx.lower_path(it)) + .map(|path| TraitRef { path: ctx.alloc_path(path, AstPtr::new(&node)) }), _ => None, } } @@ -173,11 +192,24 @@ impl TypesMap { impl Index<TypeRefId> for TypesMap { type Output = TypeRef; + #[inline] fn index(&self, index: TypeRefId) -> &Self::Output { &self.types[index] } } +impl Index<PathId> for TypesMap { + type Output = Path; + + #[inline] + fn index(&self, index: PathId) -> &Self::Output { + let TypeRef::Path(path) = &self[index.type_ref()] else { + unreachable!("`PathId` always points to `TypeRef::Path`"); + }; + path + } +} + pub type TypePtr = AstPtr<ast::Type>; pub type TypeSource = InFile<TypePtr>; @@ -187,6 +219,12 @@ pub struct TypesSourceMap { } impl TypesSourceMap { + pub const EMPTY: Self = Self { types_map_back: ArenaMap::new() }; + + pub fn type_syntax(&self, id: TypeRefId) -> Result<TypeSource, SyntheticSyntax> { + self.types_map_back.get(id).cloned().ok_or(SyntheticSyntax) + } + pub(crate) fn shrink_to_fit(&mut self) { let TypesSourceMap { types_map_back } = self; types_map_back.shrink_to_fit(); @@ -214,15 +252,15 @@ impl LifetimeRef { #[derive(Clone, PartialEq, Eq, Hash, Debug)] pub enum TypeBound { - Path(Path, TraitBoundModifier), - ForLifetime(Box<[Name]>, Path), + Path(PathId, TraitBoundModifier), + ForLifetime(Box<[Name]>, PathId), Lifetime(LifetimeRef), Use(Box<[UseArgRef]>), Error, } #[cfg(target_pointer_width = "64")] -const _: [(); 32] = [(); ::std::mem::size_of::<TypeBound>()]; +const _: [(); 24] = [(); ::std::mem::size_of::<TypeBound>()]; #[derive(Clone, PartialEq, Eq, Hash, Debug)] pub enum UseArgRef { @@ -365,8 +403,8 @@ impl TypeRef { TypeRef::ImplTrait(bounds) | TypeRef::DynTrait(bounds) => { for bound in bounds { match bound { - TypeBound::Path(path, _) | TypeBound::ForLifetime(_, path) => { - go_path(path, f, map) + &TypeBound::Path(path, _) | &TypeBound::ForLifetime(_, path) => { + go_path(&map[path], f, map) } TypeBound::Lifetime(_) | TypeBound::Error | TypeBound::Use(_) => (), } @@ -397,8 +435,8 @@ impl TypeRef { } for bound in binding.bounds.iter() { match bound { - TypeBound::Path(path, _) | TypeBound::ForLifetime(_, path) => { - go_path(path, f, map) + &TypeBound::Path(path, _) | &TypeBound::ForLifetime(_, path) => { + go_path(&map[path], f, map) } TypeBound::Lifetime(_) | TypeBound::Error | TypeBound::Use(_) => (), } @@ -425,7 +463,7 @@ pub(crate) fn type_bounds_from_ast( impl TypeBound { pub(crate) fn from_ast(ctx: &mut LowerCtx<'_>, node: ast::TypeBound) -> Self { - let mut lower_path_type = |path_type: ast::PathType| ctx.lower_path(path_type.path()?); + let mut lower_path_type = |path_type: &ast::PathType| ctx.lower_path(path_type.path()?); match node.kind() { ast::TypeBoundKind::PathType(path_type) => { @@ -433,8 +471,10 @@ impl TypeBound { Some(_) => TraitBoundModifier::Maybe, None => TraitBoundModifier::None, }; - lower_path_type(path_type) - .map(|p| TypeBound::Path(p, m)) + lower_path_type(&path_type) + .map(|p| { + TypeBound::Path(ctx.alloc_path(p, AstPtr::new(&path_type).upcast()), m) + }) .unwrap_or(TypeBound::Error) } ast::TypeBoundKind::ForType(for_type) => { @@ -445,12 +485,14 @@ impl TypeBound { .collect(), None => Box::default(), }; - let path = for_type.ty().and_then(|ty| match ty { - ast::Type::PathType(path_type) => lower_path_type(path_type), + let path = for_type.ty().and_then(|ty| match &ty { + ast::Type::PathType(path_type) => lower_path_type(path_type).map(|p| (p, ty)), _ => None, }); match path { - Some(p) => TypeBound::ForLifetime(lt_refs, p), + Some((p, ty)) => { + TypeBound::ForLifetime(lt_refs, ctx.alloc_path(p, AstPtr::new(&ty))) + } None => TypeBound::Error, } } @@ -470,10 +512,10 @@ impl TypeBound { } } - pub fn as_path(&self) -> Option<(&Path, &TraitBoundModifier)> { + pub fn as_path<'a>(&self, map: &'a TypesMap) -> Option<(&'a Path, TraitBoundModifier)> { match self { - TypeBound::Path(p, m) => Some((p, m)), - TypeBound::ForLifetime(_, p) => Some((p, &TraitBoundModifier::None)), + &TypeBound::Path(p, m) => Some((&map[p], m)), + &TypeBound::ForLifetime(_, p) => Some((&map[p], TraitBoundModifier::None)), TypeBound::Lifetime(_) | TypeBound::Error | TypeBound::Use(_) => None, } } diff --git a/crates/hir-def/src/item_tree/lower.rs b/crates/hir-def/src/item_tree/lower.rs index d519c1708b..71848845a8 100644 --- a/crates/hir-def/src/item_tree/lower.rs +++ b/crates/hir-def/src/item_tree/lower.rs @@ -34,7 +34,7 @@ use crate::{ lower::LowerCtx, path::AssociatedTypeBinding, type_ref::{ - LifetimeRef, RefType, TraitBoundModifier, TraitRef, TypeBound, TypeRef, TypeRefId, + LifetimeRef, PathId, RefType, TraitBoundModifier, TraitRef, TypeBound, TypeRef, TypeRefId, TypesMap, TypesSourceMap, }, visibility::RawVisibility, @@ -514,7 +514,7 @@ impl<'a> Ctx<'a> { }; let ret_type = if func.async_token().is_some() { - let future_impl = desugar_future_path(ret_type); + let future_impl = desugar_future_path(&mut body_ctx, ret_type); let ty_bound = TypeBound::Path(future_impl, TraitBoundModifier::None); body_ctx.alloc_type_ref_desugared(TypeRef::ImplTrait(ThinVec::from_iter([ty_bound]))) } else { @@ -936,7 +936,7 @@ impl<'a> Ctx<'a> { } } -fn desugar_future_path(orig: TypeRefId) -> Path { +fn desugar_future_path(ctx: &mut LowerCtx<'_>, orig: TypeRefId) -> PathId { let path = path![core::future::Future]; let mut generic_args: Vec<_> = std::iter::repeat(None).take(path.segments().len() - 1).collect(); @@ -948,7 +948,8 @@ fn desugar_future_path(orig: TypeRefId) -> Path { }; generic_args.push(Some(GenericArgs { bindings: Box::new([binding]), ..GenericArgs::empty() })); - Path::from_known_path(path, generic_args) + let path = Path::from_known_path(path, generic_args); + PathId::from_type_ref_unchecked(ctx.alloc_type_ref_desugared(TypeRef::Path(path))) } enum HasImplicitSelf { diff --git a/crates/hir-def/src/item_tree/pretty.rs b/crates/hir-def/src/item_tree/pretty.rs index b6816a1f96..0c5e3a3620 100644 --- a/crates/hir-def/src/item_tree/pretty.rs +++ b/crates/hir-def/src/item_tree/pretty.rs @@ -484,7 +484,7 @@ impl Printer<'_> { w!(self, "!"); } if let Some(tr) = target_trait { - self.print_path(&tr.path, types_map); + self.print_path(&types_map[tr.path], types_map); w!(self, " for "); } self.print_type_ref(*self_ty, types_map); diff --git a/crates/hir-def/src/lib.rs b/crates/hir-def/src/lib.rs index eb55ba1d53..8af27513eb 100644 --- a/crates/hir-def/src/lib.rs +++ b/crates/hir-def/src/lib.rs @@ -1535,3 +1535,6 @@ fn macro_call_as_call_id_with_eager( pub struct UnresolvedMacro { pub path: hir_expand::mod_path::ModPath, } + +#[derive(Default, Debug, Eq, PartialEq, Clone, Copy)] +pub struct SyntheticSyntax; diff --git a/crates/hir-def/src/lower.rs b/crates/hir-def/src/lower.rs index 350bb8d517..7cddd48eb1 100644 --- a/crates/hir-def/src/lower.rs +++ b/crates/hir-def/src/lower.rs @@ -10,7 +10,7 @@ use triomphe::Arc; use crate::{ db::DefDatabase, path::Path, - type_ref::{TypeBound, TypePtr, TypeRef, TypeRefId, TypesMap, TypesSourceMap}, + type_ref::{PathId, TypeBound, TypePtr, TypeRef, TypeRefId, TypesMap, TypesSourceMap}, }; pub struct LowerCtx<'a> { @@ -142,4 +142,8 @@ impl<'a> LowerCtx<'a> { pub(crate) fn alloc_error_type(&mut self) -> TypeRefId { self.types_map.types.alloc(TypeRef::Error) } + + pub(crate) fn alloc_path(&mut self, path: Path, node: TypePtr) -> PathId { + PathId::from_type_ref_unchecked(self.alloc_type_ref(TypeRef::Path(path), node)) + } } diff --git a/crates/hir-def/src/path.rs b/crates/hir-def/src/path.rs index aa2c4a6f1b..44e132061a 100644 --- a/crates/hir-def/src/path.rs +++ b/crates/hir-def/src/path.rs @@ -1,5 +1,7 @@ //! A desugared representation of paths like `crate::foo` or `<Type as Trait>::bar`. mod lower; +#[cfg(test)] +mod tests; use std::{ fmt::{self, Display}, @@ -19,6 +21,8 @@ use syntax::ast; pub use hir_expand::mod_path::{path, ModPath, PathKind}; +pub use lower::hir_segment_to_ast_segment; + #[derive(Debug, Clone, PartialEq, Eq)] pub enum ImportAlias { /// Unnamed alias, as in `use Foo as _;` @@ -230,7 +234,7 @@ impl Path { } } -#[derive(Debug, Clone, PartialEq, Eq, Hash)] +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] pub struct PathSegment<'a> { pub name: &'a Name, pub args_and_bindings: Option<&'a GenericArgs>, @@ -274,6 +278,12 @@ impl<'a> PathSegments<'a> { generic_args: self.generic_args.map(|it| it.get(..len).unwrap_or(it)), } } + pub fn strip_last(&self) -> PathSegments<'a> { + PathSegments { + segments: self.segments.split_last().map_or(&[], |it| it.1), + generic_args: self.generic_args.map(|it| it.split_last().map_or(&[][..], |it| it.1)), + } + } pub fn iter(&self) -> impl Iterator<Item = PathSegment<'a>> { self.segments .iter() diff --git a/crates/hir-def/src/path/lower.rs b/crates/hir-def/src/path/lower.rs index 37c94a5f11..3b7e7653fb 100644 --- a/crates/hir-def/src/path/lower.rs +++ b/crates/hir-def/src/path/lower.rs @@ -17,13 +17,31 @@ use crate::{ type_ref::{LifetimeRef, TypeBound, TypeRef}, }; +#[cfg(test)] +thread_local! { + /// This is used to test `hir_segment_to_ast_segment()`. It's a hack, but it makes testing much easier. + pub(super) static SEGMENT_LOWERING_MAP: std::cell::RefCell<rustc_hash::FxHashMap<ast::PathSegment, usize>> = std::cell::RefCell::default(); +} + /// Converts an `ast::Path` to `Path`. Works with use trees. /// It correctly handles `$crate` based path from macro call. +// If you modify the logic of the lowering, make sure to check if `hir_segment_to_ast_segment()` +// also needs an update. pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option<Path> { let mut kind = PathKind::Plain; let mut type_anchor = None; let mut segments = Vec::new(); let mut generic_args = Vec::new(); + #[cfg(test)] + let mut ast_segments = Vec::new(); + #[cfg(test)] + let mut ast_segments_offset = 0; + #[allow(unused_mut)] + let mut push_segment = |_segment: &ast::PathSegment, segments: &mut Vec<Name>, name| { + #[cfg(test)] + ast_segments.push(_segment.clone()); + segments.push(name); + }; loop { let segment = path.segment()?; @@ -34,6 +52,10 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< match segment.kind()? { ast::PathSegmentKind::Name(name_ref) => { if name_ref.text() == "$crate" { + if path.qualifier().is_some() { + // FIXME: Report an error. + return None; + } break kind = resolve_crate_root( ctx.db.upcast(), ctx.span_map().span_for_range(name_ref.syntax().text_range()).ctx, @@ -56,10 +78,10 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< generic_args.resize(segments.len(), None); generic_args.push(args); } - segments.push(name); + push_segment(&segment, &mut segments, name); } ast::PathSegmentKind::SelfTypeKw => { - segments.push(Name::new_symbol_root(sym::Self_.clone())); + push_segment(&segment, &mut segments, Name::new_symbol_root(sym::Self_.clone())); } ast::PathSegmentKind::Type { type_ref, trait_ref } => { assert!(path.qualifier().is_none()); // this can only occur at the first segment @@ -81,6 +103,10 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< kind = mod_path.kind; segments.extend(mod_path.segments().iter().cloned().rev()); + #[cfg(test)] + { + ast_segments_offset = mod_path.segments().len(); + } if let Some(path_generic_args) = path_generic_args { generic_args.resize(segments.len() - num_segments, None); generic_args.extend(Vec::from(path_generic_args).into_iter().rev()); @@ -112,10 +138,18 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< } } ast::PathSegmentKind::CrateKw => { + if path.qualifier().is_some() { + // FIXME: Report an error. + return None; + } kind = PathKind::Crate; break; } ast::PathSegmentKind::SelfKw => { + if path.qualifier().is_some() { + // FIXME: Report an error. + return None; + } // don't break out if `self` is the last segment of a path, this mean we got a // use tree like `foo::{self}` which we want to resolve as `foo` if !segments.is_empty() { @@ -162,6 +196,13 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< } } + #[cfg(test)] + { + ast_segments.reverse(); + SEGMENT_LOWERING_MAP + .with_borrow_mut(|map| map.extend(ast_segments.into_iter().zip(ast_segments_offset..))); + } + let mod_path = Interned::new(ModPath::from_segments(kind, segments)); if type_anchor.is_none() && generic_args.is_empty() { return Some(Path::BarePath(mod_path)); @@ -181,6 +222,41 @@ pub(super) fn lower_path(ctx: &mut LowerCtx<'_>, mut path: ast::Path) -> Option< } } +/// This function finds the AST segment that corresponds to the HIR segment +/// with index `segment_idx` on the path that is lowered from `path`. +pub fn hir_segment_to_ast_segment(path: &ast::Path, segment_idx: u32) -> Option<ast::PathSegment> { + // Too tightly coupled to `lower_path()`, but unfortunately we cannot decouple them, + // as keeping source maps for all paths segments will have a severe impact on memory usage. + + let mut segments = path.segments(); + if let Some(ast::PathSegmentKind::Type { trait_ref: Some(trait_ref), .. }) = + segments.clone().next().and_then(|it| it.kind()) + { + segments.next(); + return find_segment(trait_ref.path()?.segments().chain(segments), segment_idx); + } + return find_segment(segments, segment_idx); + + fn find_segment( + segments: impl Iterator<Item = ast::PathSegment>, + segment_idx: u32, + ) -> Option<ast::PathSegment> { + segments + .filter(|segment| match segment.kind() { + Some( + ast::PathSegmentKind::CrateKw + | ast::PathSegmentKind::SelfKw + | ast::PathSegmentKind::SuperKw + | ast::PathSegmentKind::Type { .. }, + ) + | None => false, + Some(ast::PathSegmentKind::Name(name)) => name.text() != "$crate", + Some(ast::PathSegmentKind::SelfTypeKw) => true, + }) + .nth(segment_idx as usize) + } +} + pub(super) fn lower_generic_args( lower_ctx: &mut LowerCtx<'_>, node: ast::GenericArgList, diff --git a/crates/hir-def/src/path/tests.rs b/crates/hir-def/src/path/tests.rs new file mode 100644 index 0000000000..67a27bf85e --- /dev/null +++ b/crates/hir-def/src/path/tests.rs @@ -0,0 +1,126 @@ +use expect_test::{expect, Expect}; +use span::Edition; +use syntax::ast::{self, make}; +use test_fixture::WithFixture; + +use crate::{ + lower::LowerCtx, + path::{ + lower::{hir_segment_to_ast_segment, SEGMENT_LOWERING_MAP}, + Path, + }, + pretty, + test_db::TestDB, + type_ref::{TypesMap, TypesSourceMap}, +}; + +fn lower_path(path: ast::Path) -> (TestDB, TypesMap, Option<Path>) { + let (db, file_id) = TestDB::with_single_file(""); + let mut types_map = TypesMap::default(); + let mut types_source_map = TypesSourceMap::default(); + let mut ctx = LowerCtx::new(&db, file_id.into(), &mut types_map, &mut types_source_map); + let lowered_path = ctx.lower_path(path); + (db, types_map, lowered_path) +} + +#[track_caller] +fn check_hir_to_ast(path: &str, ignore_segments: &[&str]) { + let path = make::path_from_text(path); + SEGMENT_LOWERING_MAP.with_borrow_mut(|map| map.clear()); + let _ = lower_path(path.clone()).2.expect("failed to lower path"); + SEGMENT_LOWERING_MAP.with_borrow(|map| { + for (segment, segment_idx) in map { + if ignore_segments.contains(&&*segment.to_string()) { + continue; + } + + let restored_segment = hir_segment_to_ast_segment(&path, *segment_idx as u32) + .unwrap_or_else(|| { + panic!( + "failed to map back segment `{segment}` \ + numbered {segment_idx} in HIR from path `{path}`" + ) + }); + assert_eq!( + segment, &restored_segment, + "mapping back `{segment}` numbered {segment_idx} in HIR \ + from path `{path}` produced incorrect segment `{restored_segment}`" + ); + } + }); +} + +#[test] +fn hir_to_ast_trait_ref() { + check_hir_to_ast("<A as B::C::D>::E::F", &["A"]); +} + +#[test] +fn hir_to_ast_plain_path() { + check_hir_to_ast("A::B::C::D::E::F", &[]); +} + +#[test] +fn hir_to_ast_crate_path() { + check_hir_to_ast("crate::A::B::C", &[]); + check_hir_to_ast("crate::super::super::A::B::C", &[]); +} + +#[test] +fn hir_to_ast_self_path() { + check_hir_to_ast("self::A::B::C", &[]); + check_hir_to_ast("self::super::super::A::B::C", &[]); +} + +#[test] +fn hir_to_ast_super_path() { + check_hir_to_ast("super::A::B::C", &[]); + check_hir_to_ast("super::super::super::A::B::C", &[]); +} + +#[test] +fn hir_to_ast_type_anchor_path() { + check_hir_to_ast("<A::B>::C::D", &["A", "B"]); +} + +#[test] +fn hir_to_ast_path_super_in_middle() { + check_hir_to_ast("A::super::B::super::super::C::D", &[]); +} + +#[track_caller] +fn check_fail_lowering(path: &str) { + let (_, _, lowered_path) = lower_path(make::path_from_text(path)); + assert!(lowered_path.is_none(), "path `{path}` should fail lowering"); +} + +#[test] +fn keywords_in_middle_fail_lowering1() { + check_fail_lowering("self::A::self::B::super::C::crate::D"); +} + +#[test] +fn keywords_in_middle_fail_lowering2() { + check_fail_lowering("A::super::self::C::D"); +} + +#[test] +fn keywords_in_middle_fail_lowering3() { + check_fail_lowering("A::crate::B::C::D"); +} + +#[track_caller] +fn check_path_lowering(path: &str, expected: Expect) { + let (db, types_map, lowered_path) = lower_path(make::path_from_text(path)); + let lowered_path = lowered_path.expect("failed to lower path"); + let mut buf = String::new(); + pretty::print_path(&db, &lowered_path, &types_map, &mut buf, Edition::CURRENT) + .expect("failed to pretty-print path"); + expected.assert_eq(&buf); +} + +#[test] +fn fn_like_path_with_coloncolon() { + check_path_lowering("Fn::(A, B) -> C", expect![[r#"Fn::<(A, B), Output = C>"#]]); + check_path_lowering("Fn::(A, B)", expect![[r#"Fn::<(A, B), Output = ()>"#]]); +} diff --git a/crates/hir-def/src/pretty.rs b/crates/hir-def/src/pretty.rs index 9ceb82d5fd..eb9488feaa 100644 --- a/crates/hir-def/src/pretty.rs +++ b/crates/hir-def/src/pretty.rs @@ -271,7 +271,7 @@ pub(crate) fn print_type_bounds( TraitBoundModifier::None => (), TraitBoundModifier::Maybe => write!(buf, "?")?, } - print_path(db, path, map, buf, edition)?; + print_path(db, &map[*path], map, buf, edition)?; } TypeBound::ForLifetime(lifetimes, path) => { write!( @@ -279,7 +279,7 @@ pub(crate) fn print_type_bounds( "for<{}> ", lifetimes.iter().map(|it| it.display(db.upcast(), edition)).format(", ") )?; - print_path(db, path, map, buf, edition)?; + print_path(db, &map[*path], map, buf, edition)?; } TypeBound::Lifetime(lt) => write!(buf, "{}", lt.name.display(db.upcast(), edition))?, TypeBound::Use(args) => { diff --git a/crates/hir-def/src/resolver.rs b/crates/hir-def/src/resolver.rs index 26655e40ca..0ca7070fd0 100644 --- a/crates/hir-def/src/resolver.rs +++ b/crates/hir-def/src/resolver.rs @@ -576,10 +576,12 @@ impl Resolver { match scope { Scope::BlockScope(m) => traits.extend(m.def_map[m.module_id].scope.traits()), &Scope::ImplDefScope(impl_) => { - if let Some(target_trait) = &db.impl_data(impl_).target_trait { - if let Some(TypeNs::TraitId(trait_)) = - self.resolve_path_in_type_ns_fully(db, &target_trait.path) - { + let impl_data = db.impl_data(impl_); + if let Some(target_trait) = impl_data.target_trait { + if let Some(TypeNs::TraitId(trait_)) = self.resolve_path_in_type_ns_fully( + db, + &impl_data.types_map[target_trait.path], + ) { traits.insert(trait_); } } diff --git a/crates/hir-expand/src/files.rs b/crates/hir-expand/src/files.rs index d41f69812e..8c04d05402 100644 --- a/crates/hir-expand/src/files.rs +++ b/crates/hir-expand/src/files.rs @@ -180,6 +180,13 @@ impl<FileId: FileIdToSyntax, T> InFileWrapper<FileId, T> { } } +#[allow(private_bounds)] +impl<FileId: FileIdToSyntax, N: AstNode> InFileWrapper<FileId, AstPtr<N>> { + pub fn to_node(&self, db: &dyn ExpandDatabase) -> N { + self.value.to_node(&self.file_syntax(db)) + } +} + impl<FileId: Copy, N: AstNode> InFileWrapper<FileId, N> { pub fn syntax(&self) -> InFileWrapper<FileId, &SyntaxNode> { self.with_value(self.value.syntax()) diff --git a/crates/hir-ty/src/db.rs b/crates/hir-ty/src/db.rs index 3a3a05c369..6856eaa3e0 100644 --- a/crates/hir-ty/src/db.rs +++ b/crates/hir-ty/src/db.rs @@ -22,7 +22,7 @@ use crate::{ consteval::ConstEvalError, dyn_compatibility::DynCompatibilityViolation, layout::{Layout, LayoutError}, - lower::{GenericDefaults, GenericPredicates}, + lower::{Diagnostics, GenericDefaults, GenericPredicates}, method_resolution::{InherentImpls, TraitImpls, TyFingerprint}, mir::{BorrowckResult, MirBody, MirLowerError}, Binders, ClosureId, Const, FnDefId, ImplTraitId, ImplTraits, InferenceResult, Interner, @@ -115,21 +115,35 @@ pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> { #[ra_salsa::cycle(crate::lower::ty_recover)] fn ty(&self, def: TyDefId) -> Binders<Ty>; + #[ra_salsa::invoke(crate::lower::type_for_type_alias_with_diagnostics_query)] + fn type_for_type_alias_with_diagnostics(&self, def: TypeAliasId) -> (Binders<Ty>, Diagnostics); + /// Returns the type of the value of the given constant, or `None` if the `ValueTyDefId` is /// a `StructId` or `EnumVariantId` with a record constructor. #[ra_salsa::invoke(crate::lower::value_ty_query)] fn value_ty(&self, def: ValueTyDefId) -> Option<Binders<Ty>>; + #[ra_salsa::invoke(crate::lower::impl_self_ty_with_diagnostics_query)] + #[ra_salsa::cycle(crate::lower::impl_self_ty_with_diagnostics_recover)] + fn impl_self_ty_with_diagnostics(&self, def: ImplId) -> (Binders<Ty>, Diagnostics); #[ra_salsa::invoke(crate::lower::impl_self_ty_query)] - #[ra_salsa::cycle(crate::lower::impl_self_ty_recover)] fn impl_self_ty(&self, def: ImplId) -> Binders<Ty>; + #[ra_salsa::invoke(crate::lower::const_param_ty_with_diagnostics_query)] + fn const_param_ty_with_diagnostics(&self, def: ConstParamId) -> (Ty, Diagnostics); #[ra_salsa::invoke(crate::lower::const_param_ty_query)] fn const_param_ty(&self, def: ConstParamId) -> Ty; + #[ra_salsa::invoke(crate::lower::impl_trait_with_diagnostics_query)] + fn impl_trait_with_diagnostics(&self, def: ImplId) -> Option<(Binders<TraitRef>, Diagnostics)>; #[ra_salsa::invoke(crate::lower::impl_trait_query)] fn impl_trait(&self, def: ImplId) -> Option<Binders<TraitRef>>; + #[ra_salsa::invoke(crate::lower::field_types_with_diagnostics_query)] + fn field_types_with_diagnostics( + &self, + var: VariantId, + ) -> (Arc<ArenaMap<LocalFieldId, Binders<Ty>>>, Diagnostics); #[ra_salsa::invoke(crate::lower::field_types_query)] fn field_types(&self, var: VariantId) -> Arc<ArenaMap<LocalFieldId, Binders<Ty>>>; @@ -154,6 +168,11 @@ pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> { #[ra_salsa::invoke(crate::lower::generic_predicates_query)] fn generic_predicates(&self, def: GenericDefId) -> GenericPredicates; + #[ra_salsa::invoke(crate::lower::generic_predicates_without_parent_with_diagnostics_query)] + fn generic_predicates_without_parent_with_diagnostics( + &self, + def: GenericDefId, + ) -> (GenericPredicates, Diagnostics); #[ra_salsa::invoke(crate::lower::generic_predicates_without_parent_query)] fn generic_predicates_without_parent(&self, def: GenericDefId) -> GenericPredicates; @@ -164,8 +183,13 @@ pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> { #[ra_salsa::invoke(crate::lower::trait_environment_query)] fn trait_environment(&self, def: GenericDefId) -> Arc<TraitEnvironment>; + #[ra_salsa::invoke(crate::lower::generic_defaults_with_diagnostics_query)] + #[ra_salsa::cycle(crate::lower::generic_defaults_with_diagnostics_recover)] + fn generic_defaults_with_diagnostics( + &self, + def: GenericDefId, + ) -> (GenericDefaults, Diagnostics); #[ra_salsa::invoke(crate::lower::generic_defaults_query)] - #[ra_salsa::cycle(crate::lower::generic_defaults_recover)] fn generic_defaults(&self, def: GenericDefId) -> GenericDefaults; #[ra_salsa::invoke(InherentImpls::inherent_impls_in_crate_query)] diff --git a/crates/hir-ty/src/display.rs b/crates/hir-ty/src/display.rs index 4e95bdf219..94a340fbec 100644 --- a/crates/hir-ty/src/display.rs +++ b/crates/hir-ty/src/display.rs @@ -2062,12 +2062,12 @@ impl HirDisplayWithTypesMap for TypeBound { types_map: &TypesMap, ) -> Result<(), HirDisplayError> { match self { - TypeBound::Path(path, modifier) => { + &TypeBound::Path(path, modifier) => { match modifier { TraitBoundModifier::None => (), TraitBoundModifier::Maybe => write!(f, "?")?, } - path.hir_fmt(f, types_map) + types_map[path].hir_fmt(f, types_map) } TypeBound::Lifetime(lifetime) => { write!(f, "{}", lifetime.name.display(f.db.upcast(), f.edition())) @@ -2079,7 +2079,7 @@ impl HirDisplayWithTypesMap for TypeBound { "for<{}> ", lifetimes.iter().map(|it| it.display(f.db.upcast(), edition)).format(", ") )?; - path.hir_fmt(f, types_map) + types_map[*path].hir_fmt(f, types_map) } TypeBound::Use(args) => { let edition = f.edition(); diff --git a/crates/hir-ty/src/generics.rs b/crates/hir-ty/src/generics.rs index c094bc3951..fe7541d237 100644 --- a/crates/hir-ty/src/generics.rs +++ b/crates/hir-ty/src/generics.rs @@ -55,6 +55,10 @@ impl Generics { self.def } + pub(crate) fn self_types_map(&self) -> &TypesMap { + &self.params.types_map + } + pub(crate) fn iter_id(&self) -> impl Iterator<Item = GenericParamId> + '_ { self.iter_self_id().chain(self.iter_parent_id()) } @@ -86,15 +90,13 @@ impl Generics { self.iter_self().chain(self.iter_parent()) } - pub(crate) fn iter_with_types_map( + pub(crate) fn iter_parents_with_types_map( &self, ) -> impl Iterator<Item = ((GenericParamId, GenericParamDataRef<'_>), &TypesMap)> + '_ { - self.iter_self().zip(std::iter::repeat(&self.params.types_map)).chain( - self.iter_parent().zip( - self.parent_generics() - .into_iter() - .flat_map(|it| std::iter::repeat(&it.params.types_map)), - ), + self.iter_parent().zip( + self.parent_generics() + .into_iter() + .flat_map(|it| std::iter::repeat(&it.params.types_map)), ) } diff --git a/crates/hir-ty/src/infer.rs b/crates/hir-ty/src/infer.rs index 01e0b635b2..dbee5a1a91 100644 --- a/crates/hir-ty/src/infer.rs +++ b/crates/hir-ty/src/infer.rs @@ -58,7 +58,7 @@ use crate::{ fold_tys, generics::Generics, infer::{coerce::CoerceMany, expr::ExprIsRead, unify::InferenceTable}, - lower::ImplTraitLoweringMode, + lower::{ImplTraitLoweringMode, TyLoweringDiagnostic}, mir::MirSpan, to_assoc_type_id, traits::FnTrait, @@ -191,6 +191,14 @@ impl<T> InferOk<T> { } } +#[derive(Debug, PartialEq, Eq, Clone, Copy)] +pub enum InferenceTyDiagnosticSource { + /// Diagnostics that come from types in the body. + Body, + /// Diagnostics that come from types in fn parameters/return type, or static & const types. + Signature, +} + #[derive(Debug)] pub(crate) struct TypeError; pub(crate) type InferResult<T> = Result<InferOk<T>, TypeError>; @@ -264,6 +272,10 @@ pub enum InferenceDiagnostic { expr_ty: Ty, cast_ty: Ty, }, + TyDiagnostic { + source: InferenceTyDiagnosticSource, + diag: TyLoweringDiagnostic, + }, } /// A mismatch between an expected and an inferred type. @@ -858,7 +870,8 @@ impl<'a> InferenceContext<'a> { } fn collect_const(&mut self, data: &ConstData) { - let return_ty = self.make_ty(data.type_ref, &data.types_map); + let return_ty = + self.make_ty(data.type_ref, &data.types_map, InferenceTyDiagnosticSource::Signature); // Constants might be defining usage sites of TAITs. self.make_tait_coercion_table(iter::once(&return_ty)); @@ -867,7 +880,8 @@ impl<'a> InferenceContext<'a> { } fn collect_static(&mut self, data: &StaticData) { - let return_ty = self.make_ty(data.type_ref, &data.types_map); + let return_ty = + self.make_ty(data.type_ref, &data.types_map, InferenceTyDiagnosticSource::Signature); // Statics might be defining usage sites of TAITs. self.make_tait_coercion_table(iter::once(&return_ty)); @@ -877,11 +891,12 @@ impl<'a> InferenceContext<'a> { fn collect_fn(&mut self, func: FunctionId) { let data = self.db.function_data(func); - let mut param_tys = self.with_ty_lowering(&data.types_map, |ctx| { - ctx.type_param_mode(ParamLoweringMode::Placeholder) - .impl_trait_mode(ImplTraitLoweringMode::Param); - data.params.iter().map(|&type_ref| ctx.lower_ty(type_ref)).collect::<Vec<_>>() - }); + let mut param_tys = + self.with_ty_lowering(&data.types_map, InferenceTyDiagnosticSource::Signature, |ctx| { + ctx.type_param_mode(ParamLoweringMode::Placeholder) + .impl_trait_mode(ImplTraitLoweringMode::Param); + data.params.iter().map(|&type_ref| ctx.lower_ty(type_ref)).collect::<Vec<_>>() + }); // Check if function contains a va_list, if it does then we append it to the parameter types // that are collected from the function data if data.is_varargs() { @@ -918,11 +933,12 @@ impl<'a> InferenceContext<'a> { } let return_ty = data.ret_type; - let return_ty = self.with_ty_lowering(&data.types_map, |ctx| { - ctx.type_param_mode(ParamLoweringMode::Placeholder) - .impl_trait_mode(ImplTraitLoweringMode::Opaque) - .lower_ty(return_ty) - }); + let return_ty = + self.with_ty_lowering(&data.types_map, InferenceTyDiagnosticSource::Signature, |ctx| { + ctx.type_param_mode(ParamLoweringMode::Placeholder) + .impl_trait_mode(ImplTraitLoweringMode::Opaque) + .lower_ty(return_ty) + }); let return_ty = self.insert_type_vars(return_ty); let return_ty = if let Some(rpits) = self.db.return_type_impl_traits(func) { @@ -1226,9 +1242,20 @@ impl<'a> InferenceContext<'a> { self.result.diagnostics.push(diagnostic); } + fn push_ty_diagnostics( + &mut self, + source: InferenceTyDiagnosticSource, + diagnostics: Vec<TyLoweringDiagnostic>, + ) { + self.result.diagnostics.extend( + diagnostics.into_iter().map(|diag| InferenceDiagnostic::TyDiagnostic { source, diag }), + ); + } + fn with_ty_lowering<R>( - &self, + &mut self, types_map: &TypesMap, + types_source: InferenceTyDiagnosticSource, f: impl FnOnce(&mut crate::lower::TyLoweringContext<'_>) -> R, ) -> R { let mut ctx = crate::lower::TyLoweringContext::new( @@ -1237,32 +1264,41 @@ impl<'a> InferenceContext<'a> { types_map, self.owner.into(), ); - f(&mut ctx) + let result = f(&mut ctx); + self.push_ty_diagnostics(types_source, ctx.diagnostics); + result } fn with_body_ty_lowering<R>( - &self, + &mut self, f: impl FnOnce(&mut crate::lower::TyLoweringContext<'_>) -> R, ) -> R { - self.with_ty_lowering(&self.body.types, f) + self.with_ty_lowering(&self.body.types, InferenceTyDiagnosticSource::Body, f) } - fn make_ty(&mut self, type_ref: TypeRefId, types_map: &TypesMap) -> Ty { - let ty = self.with_ty_lowering(types_map, |ctx| ctx.lower_ty(type_ref)); + fn make_ty( + &mut self, + type_ref: TypeRefId, + types_map: &TypesMap, + type_source: InferenceTyDiagnosticSource, + ) -> Ty { + let ty = self.with_ty_lowering(types_map, type_source, |ctx| ctx.lower_ty(type_ref)); let ty = self.insert_type_vars(ty); self.normalize_associated_types_in(ty) } fn make_body_ty(&mut self, type_ref: TypeRefId) -> Ty { - self.make_ty(type_ref, &self.body.types) + self.make_ty(type_ref, &self.body.types, InferenceTyDiagnosticSource::Body) } fn err_ty(&self) -> Ty { self.result.standard_types.unknown.clone() } - fn make_lifetime(&mut self, lifetime_ref: &LifetimeRef) -> Lifetime { - let lt = self.with_ty_lowering(TypesMap::EMPTY, |ctx| ctx.lower_lifetime(lifetime_ref)); + fn make_body_lifetime(&mut self, lifetime_ref: &LifetimeRef) -> Lifetime { + let lt = self.with_ty_lowering(TypesMap::EMPTY, InferenceTyDiagnosticSource::Body, |ctx| { + ctx.lower_lifetime(lifetime_ref) + }); self.insert_type_vars(lt) } @@ -1431,12 +1467,20 @@ impl<'a> InferenceContext<'a> { Some(ResolveValueResult::ValueNs(value, _)) => match value { ValueNs::EnumVariantId(var) => { let substs = ctx.substs_from_path(path, var.into(), true); + self.push_ty_diagnostics( + InferenceTyDiagnosticSource::Body, + ctx.diagnostics, + ); let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); return (ty, Some(var.into())); } ValueNs::StructId(strukt) => { let substs = ctx.substs_from_path(path, strukt.into(), true); + self.push_ty_diagnostics( + InferenceTyDiagnosticSource::Body, + ctx.diagnostics, + ); let ty = self.db.ty(strukt.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); return (ty, Some(strukt.into())); @@ -1462,18 +1506,21 @@ impl<'a> InferenceContext<'a> { return match resolution { TypeNs::AdtId(AdtId::StructId(strukt)) => { let substs = ctx.substs_from_path(path, strukt.into(), true); + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let ty = self.db.ty(strukt.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); forbid_unresolved_segments((ty, Some(strukt.into())), unresolved) } TypeNs::AdtId(AdtId::UnionId(u)) => { let substs = ctx.substs_from_path(path, u.into(), true); + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let ty = self.db.ty(u.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); forbid_unresolved_segments((ty, Some(u.into())), unresolved) } TypeNs::EnumVariantId(var) => { let substs = ctx.substs_from_path(path, var.into(), true); + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let ty = self.db.ty(var.lookup(self.db.upcast()).parent.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); forbid_unresolved_segments((ty, Some(var.into())), unresolved) @@ -1519,6 +1566,9 @@ impl<'a> InferenceContext<'a> { resolved_segment, current_segment, false, + &mut |_, _reason| { + // FIXME: Report an error. + }, ); ty = self.table.insert_type_vars(ty); @@ -1532,6 +1582,7 @@ impl<'a> InferenceContext<'a> { remaining_idx += 1; remaining_segments = remaining_segments.skip(1); } + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let variant = ty.as_adt().and_then(|(id, _)| match id { AdtId::StructId(s) => Some(VariantId::StructId(s)), @@ -1550,6 +1601,7 @@ impl<'a> InferenceContext<'a> { }; let substs = ctx.substs_from_path_segment(resolved_seg, Some(it.into()), true, None); + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let ty = self.db.ty(it.into()); let ty = self.insert_type_vars(ty.substitute(Interner, &substs)); diff --git a/crates/hir-ty/src/infer/expr.rs b/crates/hir-ty/src/infer/expr.rs index 32b4ea2f28..e060b37f15 100644 --- a/crates/hir-ty/src/infer/expr.rs +++ b/crates/hir-ty/src/infer/expr.rs @@ -2155,7 +2155,7 @@ impl InferenceContext<'_> { DebruijnIndex::INNERMOST, ) }, - |this, lt_ref| this.make_lifetime(lt_ref), + |this, lt_ref| this.make_body_lifetime(lt_ref), ), }; diff --git a/crates/hir-ty/src/infer/path.rs b/crates/hir-ty/src/infer/path.rs index 7550d197a3..a6296c3af2 100644 --- a/crates/hir-ty/src/infer/path.rs +++ b/crates/hir-ty/src/infer/path.rs @@ -19,7 +19,7 @@ use crate::{ TyBuilder, TyExt, TyKind, ValueTyDefId, }; -use super::{ExprOrPatId, InferenceContext}; +use super::{ExprOrPatId, InferenceContext, InferenceTyDiagnosticSource}; impl InferenceContext<'_> { pub(super) fn infer_path(&mut self, path: &Path, id: ExprOrPatId) -> Option<Ty> { @@ -163,6 +163,7 @@ impl InferenceContext<'_> { let remaining_segments_for_ty = path.segments().take(path.segments().len() - 1); let (ty, _) = ctx.lower_ty_relative_path(ty, orig_ns, remaining_segments_for_ty); + self.push_ty_diagnostics(InferenceTyDiagnosticSource::Body, ctx.diagnostics); let ty = self.table.insert_type_vars(ty); let ty = self.table.normalize_associated_types_in(ty); self.resolve_ty_assoc_item(ty, last.name, id).map(|(it, substs)| (it, Some(substs)))? @@ -265,6 +266,9 @@ impl InferenceContext<'_> { resolved_segment, remaining_segments_for_ty, true, + &mut |_, _reason| { + // FIXME: Report an error. + }, ) }); if ty.is_unknown() { diff --git a/crates/hir-ty/src/lib.rs b/crates/hir-ty/src/lib.rs index fdc6579763..8bb90ca31e 100644 --- a/crates/hir-ty/src/lib.rs +++ b/crates/hir-ty/src/lib.rs @@ -84,12 +84,14 @@ pub use infer::{ cast::CastError, closure::{CaptureKind, CapturedItem}, could_coerce, could_unify, could_unify_deeply, Adjust, Adjustment, AutoBorrow, BindingMode, - InferenceDiagnostic, InferenceResult, OverloadedDeref, PointerCast, + InferenceDiagnostic, InferenceResult, InferenceTyDiagnosticSource, OverloadedDeref, + PointerCast, }; pub use interner::Interner; pub use lower::{ - associated_type_shorthand_candidates, ImplTraitLoweringMode, ParamLoweringMode, TyDefId, - TyLoweringContext, ValueTyDefId, + associated_type_shorthand_candidates, GenericArgsProhibitedReason, ImplTraitLoweringMode, + ParamLoweringMode, TyDefId, TyLoweringContext, TyLoweringDiagnostic, TyLoweringDiagnosticKind, + ValueTyDefId, }; pub use mapping::{ from_assoc_type_id, from_chalk_trait_id, from_foreign_def_id, from_placeholder_idx, diff --git a/crates/hir-ty/src/lower.rs b/crates/hir-ty/src/lower.rs index b868ea95f8..b23f2749ab 100644 --- a/crates/hir-ty/src/lower.rs +++ b/crates/hir-ty/src/lower.rs @@ -33,8 +33,8 @@ use hir_def::{ path::{GenericArg, GenericArgs, ModPath, Path, PathKind, PathSegment, PathSegments}, resolver::{HasResolver, LifetimeNs, Resolver, TypeNs}, type_ref::{ - ConstRef, LifetimeRef, TraitBoundModifier, TraitRef as HirTraitRef, TypeBound, TypeRef, - TypeRefId, TypesMap, TypesSourceMap, + ConstRef, LifetimeRef, PathId, TraitBoundModifier, TraitRef as HirTraitRef, TypeBound, + TypeRef, TypeRefId, TypesMap, TypesSourceMap, }, AdtId, AssocItemId, CallableDefId, ConstId, ConstParamId, DefWithBodyId, EnumId, EnumVariantId, FunctionId, GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstLoc, ItemContainerId, @@ -48,7 +48,7 @@ use rustc_pattern_analysis::Captures; use smallvec::SmallVec; use stdx::{impl_from, never}; use syntax::ast; -use triomphe::Arc; +use triomphe::{Arc, ThinArc}; use crate::{ all_super_traits, @@ -102,6 +102,31 @@ impl ImplTraitLoweringState { } } +type TypeSource = Either<TypeRefId, hir_def::type_ref::TypeSource>; + +#[derive(Debug, PartialEq, Eq, Clone)] +pub struct TyLoweringDiagnostic { + pub source: TypeSource, + pub kind: TyLoweringDiagnosticKind, +} + +#[derive(Debug, PartialEq, Eq, Clone)] +pub enum TyLoweringDiagnosticKind { + GenericArgsProhibited { segment: u32, reason: GenericArgsProhibitedReason }, +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum GenericArgsProhibitedReason { + Module, + TyParam, + SelfTy, + PrimitiveTy, + /// When there is a generic enum, within the expression `Enum::Variant`, + /// either `Enum` or `Variant` are allowed to have generic arguments, but not both. + // FIXME: This is not used now but it should be. + EnumVariant, +} + #[derive(Debug)] pub struct TyLoweringContext<'a> { pub db: &'a dyn HirDatabase, @@ -125,6 +150,7 @@ pub struct TyLoweringContext<'a> { expander: Option<Expander>, /// Tracks types with explicit `?Sized` bounds. pub(crate) unsized_types: FxHashSet<Ty>, + pub(crate) diagnostics: Vec<TyLoweringDiagnostic>, } impl<'a> TyLoweringContext<'a> { @@ -159,6 +185,7 @@ impl<'a> TyLoweringContext<'a> { type_param_mode, expander: None, unsized_types: FxHashSet::default(), + diagnostics: Vec::new(), } } @@ -198,6 +225,20 @@ impl<'a> TyLoweringContext<'a> { self.type_param_mode = type_param_mode; self } + + pub fn push_diagnostic(&mut self, type_ref: TypeRefId, kind: TyLoweringDiagnosticKind) { + let source = match self.types_source_map { + Some(source_map) => { + let Ok(source) = source_map.type_syntax(type_ref) else { + stdx::never!("error in synthetic type"); + return; + }; + Either::Right(source) + } + None => Either::Left(type_ref), + }; + self.diagnostics.push(TyLoweringDiagnostic { source, kind }); + } } #[derive(Copy, Clone, Debug, PartialEq, Eq, Default)] @@ -264,7 +305,8 @@ impl<'a> TyLoweringContext<'a> { .intern(Interner) } TypeRef::Path(path) => { - let (ty, res_) = self.lower_path(path); + let (ty, res_) = + self.lower_path(path, PathId::from_type_ref_unchecked(type_ref_id)); res = res_; ty } @@ -463,6 +505,7 @@ impl<'a> TyLoweringContext<'a> { impl_trait_mode: mem::take(&mut self.impl_trait_mode), expander: self.expander.take(), unsized_types: mem::take(&mut self.unsized_types), + diagnostics: mem::take(&mut self.diagnostics), }; let ty = inner_ctx.lower_ty(type_ref); @@ -470,6 +513,7 @@ impl<'a> TyLoweringContext<'a> { self.impl_trait_mode = inner_ctx.impl_trait_mode; self.expander = inner_ctx.expander; self.unsized_types = inner_ctx.unsized_types; + self.diagnostics = inner_ctx.diagnostics; self.expander.as_mut().unwrap().exit(mark); Some(ty) @@ -541,6 +585,10 @@ impl<'a> TyLoweringContext<'a> { resolved_segment: PathSegment<'_>, remaining_segments: PathSegments<'_>, infer_args: bool, + on_prohibited_generics_for_resolved_segment: &mut dyn FnMut( + &mut Self, + GenericArgsProhibitedReason, + ), ) -> (Ty, Option<TypeNs>) { let ty = match resolution { TypeNs::TraitId(trait_) => { @@ -607,28 +655,44 @@ impl<'a> TyLoweringContext<'a> { // FIXME(trait_alias): Implement trait alias. return (TyKind::Error.intern(Interner), None); } - TypeNs::GenericParam(param_id) => match self.type_param_mode { - ParamLoweringMode::Placeholder => { - TyKind::Placeholder(to_placeholder_idx(self.db, param_id.into())) + TypeNs::GenericParam(param_id) => { + if resolved_segment.args_and_bindings.is_some() { + on_prohibited_generics_for_resolved_segment( + self, + GenericArgsProhibitedReason::TyParam, + ); } - ParamLoweringMode::Variable => { - let idx = match self - .generics() - .expect("generics in scope") - .type_or_const_param_idx(param_id.into()) - { - None => { - never!("no matching generics"); - return (TyKind::Error.intern(Interner), None); - } - Some(idx) => idx, - }; - TyKind::BoundVar(BoundVar::new(self.in_binders, idx)) + match self.type_param_mode { + ParamLoweringMode::Placeholder => { + TyKind::Placeholder(to_placeholder_idx(self.db, param_id.into())) + } + ParamLoweringMode::Variable => { + let idx = match self + .generics() + .expect("generics in scope") + .type_or_const_param_idx(param_id.into()) + { + None => { + never!("no matching generics"); + return (TyKind::Error.intern(Interner), None); + } + Some(idx) => idx, + }; + + TyKind::BoundVar(BoundVar::new(self.in_binders, idx)) + } } + .intern(Interner) } - .intern(Interner), TypeNs::SelfType(impl_id) => { + if resolved_segment.args_and_bindings.is_some() { + on_prohibited_generics_for_resolved_segment( + self, + GenericArgsProhibitedReason::SelfTy, + ); + } + let generics = self.generics().expect("impl should have generic param scope"); match self.type_param_mode { @@ -654,6 +718,13 @@ impl<'a> TyLoweringContext<'a> { } } TypeNs::AdtSelfType(adt) => { + if resolved_segment.args_and_bindings.is_some() { + on_prohibited_generics_for_resolved_segment( + self, + GenericArgsProhibitedReason::SelfTy, + ); + } + let generics = generics(self.db.upcast(), adt.into()); let substs = match self.type_param_mode { ParamLoweringMode::Placeholder => generics.placeholder_subst(self.db), @@ -666,6 +737,12 @@ impl<'a> TyLoweringContext<'a> { TypeNs::AdtId(it) => self.lower_path_inner(resolved_segment, it.into(), infer_args), TypeNs::BuiltinType(it) => { + if resolved_segment.args_and_bindings.is_some() { + on_prohibited_generics_for_resolved_segment( + self, + GenericArgsProhibitedReason::PrimitiveTy, + ); + } self.lower_path_inner(resolved_segment, it.into(), infer_args) } TypeNs::TypeAliasId(it) => { @@ -677,7 +754,7 @@ impl<'a> TyLoweringContext<'a> { self.lower_ty_relative_path(ty, Some(resolution), remaining_segments) } - pub(crate) fn lower_path(&mut self, path: &Path) -> (Ty, Option<TypeNs>) { + pub(crate) fn lower_path(&mut self, path: &Path, path_id: PathId) -> (Ty, Option<TypeNs>) { // Resolve the path (in type namespace) if let Some(type_ref) = path.type_anchor() { let (ty, res) = self.lower_ty_ext(type_ref); @@ -692,19 +769,44 @@ impl<'a> TyLoweringContext<'a> { if matches!(resolution, TypeNs::TraitId(_)) && remaining_index.is_none() { // trait object type without dyn - let bound = TypeBound::Path(path.clone(), TraitBoundModifier::None); + let bound = TypeBound::Path(path_id, TraitBoundModifier::None); let ty = self.lower_dyn_trait(&[bound]); return (ty, None); } - let (resolved_segment, remaining_segments) = match remaining_index { - None => ( - path.segments().last().expect("resolved path has at least one element"), - PathSegments::EMPTY, - ), - Some(i) => (path.segments().get(i - 1).unwrap(), path.segments().skip(i)), - }; - self.lower_partly_resolved_path(resolution, resolved_segment, remaining_segments, false) + let (module_segments, resolved_segment_idx, resolved_segment, remaining_segments) = + match remaining_index { + None => ( + path.segments().strip_last(), + path.segments().len() - 1, + path.segments().last().expect("resolved path has at least one element"), + PathSegments::EMPTY, + ), + Some(i) => ( + path.segments().take(i - 1), + i - 1, + path.segments().get(i - 1).unwrap(), + path.segments().skip(i), + ), + }; + + self.prohibit_generics(path_id, 0, module_segments, GenericArgsProhibitedReason::Module); + + self.lower_partly_resolved_path( + resolution, + resolved_segment, + remaining_segments, + false, + &mut |this, reason| { + this.push_diagnostic( + path_id.type_ref(), + TyLoweringDiagnosticKind::GenericArgsProhibited { + segment: resolved_segment_idx as u32, + reason, + }, + ) + }, + ) } fn select_associated_type(&mut self, res: Option<TypeNs>, segment: PathSegment<'_>) -> Ty { @@ -741,12 +843,8 @@ impl<'a> TyLoweringContext<'a> { // generic params. It's inefficient to splice the `Substitution`s, so we may want // that method to optionally take parent `Substitution` as we already know them at // this point (`t.substitution`). - let substs = self.substs_from_path_segment( - segment.clone(), - Some(associated_ty.into()), - false, - None, - ); + let substs = + self.substs_from_path_segment(segment, Some(associated_ty.into()), false, None); let len_self = crate::generics::generics(self.db.upcast(), associated_ty.into()).len_self(); @@ -998,12 +1096,41 @@ impl<'a> TyLoweringContext<'a> { TraitRef { trait_id: to_chalk_trait_id(resolved), substitution: substs } } - fn lower_trait_ref_from_path(&mut self, path: &Path, explicit_self_ty: Ty) -> Option<TraitRef> { + fn prohibit_generics( + &mut self, + path_id: PathId, + idx: u32, + segments: PathSegments<'_>, + reason: GenericArgsProhibitedReason, + ) { + segments.iter().zip(idx..).for_each(|(segment, idx)| { + if segment.args_and_bindings.is_some() { + self.push_diagnostic( + path_id.type_ref(), + TyLoweringDiagnosticKind::GenericArgsProhibited { segment: idx, reason }, + ); + } + }); + } + + fn lower_trait_ref_from_path( + &mut self, + path_id: PathId, + explicit_self_ty: Ty, + ) -> Option<TraitRef> { + let path = &self.types_map[path_id]; let resolved = match self.resolver.resolve_path_in_type_ns_fully(self.db.upcast(), path)? { // FIXME(trait_alias): We need to handle trait alias here. TypeNs::TraitId(tr) => tr, _ => return None, }; + // Do this after we verify it's indeed a trait to not confuse the user if they're not modules. + self.prohibit_generics( + path_id, + 0, + path.segments().strip_last(), + GenericArgsProhibitedReason::Module, + ); let segment = path.segments().last().expect("path should have at least one segment"); Some(self.lower_trait_ref_from_resolved_path(resolved, segment, explicit_self_ty)) } @@ -1013,7 +1140,7 @@ impl<'a> TyLoweringContext<'a> { trait_ref: &HirTraitRef, explicit_self_ty: Ty, ) -> Option<TraitRef> { - self.lower_trait_ref_from_path(&trait_ref.path, explicit_self_ty) + self.lower_trait_ref_from_path(trait_ref.path, explicit_self_ty) } fn trait_ref_substs_from_path( @@ -1072,11 +1199,11 @@ impl<'a> TyLoweringContext<'a> { ) -> impl Iterator<Item = QuantifiedWhereClause> + use<'b, 'a> { let mut trait_ref = None; let clause = match bound { - TypeBound::Path(path, TraitBoundModifier::None) => { + &TypeBound::Path(path, TraitBoundModifier::None) => { trait_ref = self.lower_trait_ref_from_path(path, self_ty); trait_ref.clone().map(WhereClause::Implemented).map(crate::wrap_empty_binders) } - TypeBound::Path(path, TraitBoundModifier::Maybe) => { + &TypeBound::Path(path, TraitBoundModifier::Maybe) => { let sized_trait = self .db .lang_item(self.resolver.krate(), LangItem::Sized) @@ -1092,7 +1219,7 @@ impl<'a> TyLoweringContext<'a> { } None } - TypeBound::ForLifetime(_, path) => { + &TypeBound::ForLifetime(_, path) => { // FIXME Don't silently drop the hrtb lifetimes here trait_ref = self.lower_trait_ref_from_path(path, self_ty); trait_ref.clone().map(WhereClause::Implemented).map(crate::wrap_empty_binders) @@ -1121,8 +1248,8 @@ impl<'a> TyLoweringContext<'a> { trait_ref: TraitRef, ) -> impl Iterator<Item = QuantifiedWhereClause> + use<'b, 'a> { let last_segment = match bound { - TypeBound::Path(path, TraitBoundModifier::None) | TypeBound::ForLifetime(_, path) => { - path.segments().last() + &TypeBound::Path(path, TraitBoundModifier::None) | &TypeBound::ForLifetime(_, path) => { + self.types_map[path].segments().last() } TypeBound::Path(_, TraitBoundModifier::Maybe) | TypeBound::Use(_) @@ -1227,7 +1354,9 @@ impl<'a> TyLoweringContext<'a> { } _ => unreachable!(), } - ext.lower_ty(type_ref) + let ty = ext.lower_ty(type_ref); + self.diagnostics.extend(ext.diagnostics); + ty } else { self.lower_ty(type_ref) }; @@ -1523,11 +1652,24 @@ fn named_associated_type_shorthand_candidates<R>( } } -/// Build the type of all specific fields of a struct or enum variant. +pub(crate) type Diagnostics = Option<ThinArc<(), TyLoweringDiagnostic>>; + +fn create_diagnostics(diagnostics: Vec<TyLoweringDiagnostic>) -> Diagnostics { + (!diagnostics.is_empty()).then(|| ThinArc::from_header_and_iter((), diagnostics.into_iter())) +} + pub(crate) fn field_types_query( db: &dyn HirDatabase, variant_id: VariantId, ) -> Arc<ArenaMap<LocalFieldId, Binders<Ty>>> { + db.field_types_with_diagnostics(variant_id).0 +} + +/// Build the type of all specific fields of a struct or enum variant. +pub(crate) fn field_types_with_diagnostics_query( + db: &dyn HirDatabase, + variant_id: VariantId, +) -> (Arc<ArenaMap<LocalFieldId, Binders<Ty>>>, Diagnostics) { let var_data = variant_id.variant_data(db.upcast()); let (resolver, def): (_, GenericDefId) = match variant_id { VariantId::StructId(it) => (it.resolver(db.upcast()), it.into()), @@ -1543,7 +1685,7 @@ pub(crate) fn field_types_query( for (field_id, field_data) in var_data.fields().iter() { res.insert(field_id, make_binders(db, &generics, ctx.lower_ty(field_data.type_ref))); } - Arc::new(res) + (Arc::new(res), create_diagnostics(ctx.diagnostics)) } /// This query exists only to be used when resolving short-hand associated types @@ -1593,9 +1735,10 @@ pub(crate) fn generic_predicates_for_param_query( } match bound { - TypeBound::ForLifetime(_, path) | TypeBound::Path(path, _) => { + &TypeBound::ForLifetime(_, path) | &TypeBound::Path(path, _) => { // Only lower the bound if the trait could possibly define the associated // type we're looking for. + let path = &ctx.types_map[path]; let Some(assoc_name) = &assoc_name else { return true }; let Some(TypeNs::TraitId(tr)) = @@ -1743,15 +1886,22 @@ pub(crate) fn generic_predicates_query( db: &dyn HirDatabase, def: GenericDefId, ) -> GenericPredicates { - generic_predicates_filtered_by(db, def, |_, _| true) + generic_predicates_filtered_by(db, def, |_, _| true).0 } -/// Resolve the where clause(s) of an item with generics, -/// except the ones inherited from the parent pub(crate) fn generic_predicates_without_parent_query( db: &dyn HirDatabase, def: GenericDefId, ) -> GenericPredicates { + db.generic_predicates_without_parent_with_diagnostics(def).0 +} + +/// Resolve the where clause(s) of an item with generics, +/// except the ones inherited from the parent +pub(crate) fn generic_predicates_without_parent_with_diagnostics_query( + db: &dyn HirDatabase, + def: GenericDefId, +) -> (GenericPredicates, Diagnostics) { generic_predicates_filtered_by(db, def, |_, d| *d == def) } @@ -1761,7 +1911,7 @@ fn generic_predicates_filtered_by<F>( db: &dyn HirDatabase, def: GenericDefId, filter: F, -) -> GenericPredicates +) -> (GenericPredicates, Diagnostics) where F: Fn(&WherePredicate, &GenericDefId) -> bool, { @@ -1802,7 +1952,10 @@ where ); }; } - GenericPredicates(predicates.is_empty().not().then(|| predicates.into())) + ( + GenericPredicates(predicates.is_empty().not().then(|| predicates.into())), + create_diagnostics(ctx.diagnostics), + ) } /// Generate implicit `: Sized` predicates for all generics that has no `?Sized` bound. @@ -1855,75 +2008,110 @@ impl ops::Deref for GenericDefaults { } } -/// Resolve the default type params from generics pub(crate) fn generic_defaults_query(db: &dyn HirDatabase, def: GenericDefId) -> GenericDefaults { + db.generic_defaults_with_diagnostics(def).0 +} + +/// Resolve the default type params from generics. +/// +/// Diagnostics are only returned for this `GenericDefId` (returned defaults include parents). +pub(crate) fn generic_defaults_with_diagnostics_query( + db: &dyn HirDatabase, + def: GenericDefId, +) -> (GenericDefaults, Diagnostics) { let generic_params = generics(db.upcast(), def); if generic_params.len() == 0 { - return GenericDefaults(None); + return (GenericDefaults(None), None); } let resolver = def.resolver(db.upcast()); let parent_start_idx = generic_params.len_self(); - let mut ctx = TyLoweringContext::new(db, &resolver, TypesMap::EMPTY, def.into()) - .with_impl_trait_mode(ImplTraitLoweringMode::Disallowed) - .with_type_param_mode(ParamLoweringMode::Variable); - GenericDefaults(Some(Arc::from_iter(generic_params.iter_with_types_map().enumerate().map( - |(idx, ((id, p), types_map))| { - ctx.types_map = types_map; - match p { - GenericParamDataRef::TypeParamData(p) => { - let ty = p.default.as_ref().map_or(TyKind::Error.intern(Interner), |ty| { - // Each default can only refer to previous parameters. - // Type variable default referring to parameter coming - // after it is forbidden (FIXME: report diagnostic) - fallback_bound_vars(ctx.lower_ty(*ty), idx, parent_start_idx) - }); - crate::make_binders(db, &generic_params, ty.cast(Interner)) - } - GenericParamDataRef::ConstParamData(p) => { - let GenericParamId::ConstParamId(id) = id else { - unreachable!("Unexpected lifetime or type argument") - }; + let mut ctx = + TyLoweringContext::new(db, &resolver, generic_params.self_types_map(), def.into()) + .with_impl_trait_mode(ImplTraitLoweringMode::Disallowed) + .with_type_param_mode(ParamLoweringMode::Variable); + let mut idx = 0; + let mut defaults = generic_params + .iter_self() + .map(|(id, p)| { + let result = + handle_generic_param(&mut ctx, idx, id, p, parent_start_idx, &generic_params); + idx += 1; + result + }) + .collect::<Vec<_>>(); + let diagnostics = create_diagnostics(mem::take(&mut ctx.diagnostics)); + defaults.extend(generic_params.iter_parents_with_types_map().map(|((id, p), types_map)| { + ctx.types_map = types_map; + let result = handle_generic_param(&mut ctx, idx, id, p, parent_start_idx, &generic_params); + idx += 1; + result + })); + let defaults = GenericDefaults(Some(Arc::from_iter(defaults))); + return (defaults, diagnostics); + + fn handle_generic_param( + ctx: &mut TyLoweringContext<'_>, + idx: usize, + id: GenericParamId, + p: GenericParamDataRef<'_>, + parent_start_idx: usize, + generic_params: &Generics, + ) -> Binders<crate::GenericArg> { + match p { + GenericParamDataRef::TypeParamData(p) => { + let ty = p.default.as_ref().map_or(TyKind::Error.intern(Interner), |ty| { + // Each default can only refer to previous parameters. + // Type variable default referring to parameter coming + // after it is forbidden (FIXME: report diagnostic) + fallback_bound_vars(ctx.lower_ty(*ty), idx, parent_start_idx) + }); + crate::make_binders(ctx.db, generic_params, ty.cast(Interner)) + } + GenericParamDataRef::ConstParamData(p) => { + let GenericParamId::ConstParamId(id) = id else { + unreachable!("Unexpected lifetime or type argument") + }; - let mut val = p.default.as_ref().map_or_else( - || unknown_const_as_generic(db.const_param_ty(id)), - |c| { - let param_ty = ctx.lower_ty(p.ty); - let c = ctx.lower_const(c, param_ty); - c.cast(Interner) - }, - ); - // Each default can only refer to previous parameters, see above. - val = fallback_bound_vars(val, idx, parent_start_idx); - make_binders(db, &generic_params, val) - } - GenericParamDataRef::LifetimeParamData(_) => { - make_binders(db, &generic_params, error_lifetime().cast(Interner)) - } + let mut val = p.default.as_ref().map_or_else( + || unknown_const_as_generic(ctx.db.const_param_ty(id)), + |c| { + let param_ty = ctx.lower_ty(p.ty); + let c = ctx.lower_const(c, param_ty); + c.cast(Interner) + }, + ); + // Each default can only refer to previous parameters, see above. + val = fallback_bound_vars(val, idx, parent_start_idx); + make_binders(ctx.db, generic_params, val) } - }, - )))) + GenericParamDataRef::LifetimeParamData(_) => { + make_binders(ctx.db, generic_params, error_lifetime().cast(Interner)) + } + } + } } -pub(crate) fn generic_defaults_recover( +pub(crate) fn generic_defaults_with_diagnostics_recover( db: &dyn HirDatabase, _cycle: &Cycle, def: &GenericDefId, -) -> GenericDefaults { +) -> (GenericDefaults, Diagnostics) { let generic_params = generics(db.upcast(), *def); if generic_params.len() == 0 { - return GenericDefaults(None); + return (GenericDefaults(None), None); } // FIXME: this code is not covered in tests. // we still need one default per parameter - GenericDefaults(Some(Arc::from_iter(generic_params.iter_id().map(|id| { + let defaults = GenericDefaults(Some(Arc::from_iter(generic_params.iter_id().map(|id| { let val = match id { GenericParamId::TypeParamId(_) => TyKind::Error.intern(Interner).cast(Interner), GenericParamId::ConstParamId(id) => unknown_const_as_generic(db.const_param_ty(id)), GenericParamId::LifetimeParamId(_) => error_lifetime().cast(Interner), }; crate::make_binders(db, &generic_params, val) - })))) + })))); + (defaults, None) } fn fn_sig_for_fn(db: &dyn HirDatabase, def: FunctionId) -> PolyFnSig { @@ -2066,7 +2254,10 @@ fn type_for_adt(db: &dyn HirDatabase, adt: AdtId) -> Binders<Ty> { make_binders(db, &generics, ty) } -fn type_for_type_alias(db: &dyn HirDatabase, t: TypeAliasId) -> Binders<Ty> { +pub(crate) fn type_for_type_alias_with_diagnostics_query( + db: &dyn HirDatabase, + t: TypeAliasId, +) -> (Binders<Ty>, Diagnostics) { let generics = generics(db.upcast(), t.into()); let resolver = t.resolver(db.upcast()); let type_alias_data = db.type_alias_data(t); @@ -2081,7 +2272,7 @@ fn type_for_type_alias(db: &dyn HirDatabase, t: TypeAliasId) -> Binders<Ty> { .map(|type_ref| ctx.lower_ty(type_ref)) .unwrap_or_else(|| TyKind::Error.intern(Interner)) }; - make_binders(db, &generics, inner) + (make_binders(db, &generics, inner), create_diagnostics(ctx.diagnostics)) } #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] @@ -2124,7 +2315,7 @@ pub(crate) fn ty_query(db: &dyn HirDatabase, def: TyDefId) -> Binders<Ty> { match def { TyDefId::BuiltinType(it) => Binders::empty(Interner, TyBuilder::builtin(it)), TyDefId::AdtId(it) => type_for_adt(db, it), - TyDefId::TypeAliasId(it) => type_for_type_alias(db, it), + TyDefId::TypeAliasId(it) => db.type_for_type_alias_with_diagnostics(it).0, } } @@ -2149,47 +2340,73 @@ pub(crate) fn value_ty_query(db: &dyn HirDatabase, def: ValueTyDefId) -> Option< } pub(crate) fn impl_self_ty_query(db: &dyn HirDatabase, impl_id: ImplId) -> Binders<Ty> { + db.impl_self_ty_with_diagnostics(impl_id).0 +} + +pub(crate) fn impl_self_ty_with_diagnostics_query( + db: &dyn HirDatabase, + impl_id: ImplId, +) -> (Binders<Ty>, Diagnostics) { let impl_data = db.impl_data(impl_id); let resolver = impl_id.resolver(db.upcast()); let generics = generics(db.upcast(), impl_id.into()); let mut ctx = TyLoweringContext::new(db, &resolver, &impl_data.types_map, impl_id.into()) .with_type_param_mode(ParamLoweringMode::Variable); - make_binders(db, &generics, ctx.lower_ty(impl_data.self_ty)) + ( + make_binders(db, &generics, ctx.lower_ty(impl_data.self_ty)), + create_diagnostics(ctx.diagnostics), + ) } -// returns None if def is a type arg pub(crate) fn const_param_ty_query(db: &dyn HirDatabase, def: ConstParamId) -> Ty { + db.const_param_ty_with_diagnostics(def).0 +} + +// returns None if def is a type arg +pub(crate) fn const_param_ty_with_diagnostics_query( + db: &dyn HirDatabase, + def: ConstParamId, +) -> (Ty, Diagnostics) { let parent_data = db.generic_params(def.parent()); let data = &parent_data[def.local_id()]; let resolver = def.parent().resolver(db.upcast()); let mut ctx = TyLoweringContext::new(db, &resolver, &parent_data.types_map, def.parent().into()); - match data { + let ty = match data { TypeOrConstParamData::TypeParamData(_) => { never!(); Ty::new(Interner, TyKind::Error) } TypeOrConstParamData::ConstParamData(d) => ctx.lower_ty(d.ty), - } + }; + (ty, create_diagnostics(ctx.diagnostics)) } -pub(crate) fn impl_self_ty_recover( +pub(crate) fn impl_self_ty_with_diagnostics_recover( db: &dyn HirDatabase, _cycle: &Cycle, impl_id: &ImplId, -) -> Binders<Ty> { +) -> (Binders<Ty>, Diagnostics) { let generics = generics(db.upcast(), (*impl_id).into()); - make_binders(db, &generics, TyKind::Error.intern(Interner)) + (make_binders(db, &generics, TyKind::Error.intern(Interner)), None) } pub(crate) fn impl_trait_query(db: &dyn HirDatabase, impl_id: ImplId) -> Option<Binders<TraitRef>> { + db.impl_trait_with_diagnostics(impl_id).map(|it| it.0) +} + +pub(crate) fn impl_trait_with_diagnostics_query( + db: &dyn HirDatabase, + impl_id: ImplId, +) -> Option<(Binders<TraitRef>, Diagnostics)> { let impl_data = db.impl_data(impl_id); let resolver = impl_id.resolver(db.upcast()); let mut ctx = TyLoweringContext::new(db, &resolver, &impl_data.types_map, impl_id.into()) .with_type_param_mode(ParamLoweringMode::Variable); let (self_ty, binders) = db.impl_self_ty(impl_id).into_value_and_skipped_binders(); let target_trait = impl_data.target_trait.as_ref()?; - Some(Binders::new(binders, ctx.lower_trait_ref(target_trait, self_ty)?)) + let trait_ref = Binders::new(binders, ctx.lower_trait_ref(target_trait, self_ty)?); + Some((trait_ref, create_diagnostics(ctx.diagnostics))) } pub(crate) fn return_type_impl_traits( diff --git a/crates/hir-ty/src/tests.rs b/crates/hir-ty/src/tests.rs index bcf9d5ceff..cabeeea2bd 100644 --- a/crates/hir-ty/src/tests.rs +++ b/crates/hir-ty/src/tests.rs @@ -18,13 +18,13 @@ use std::sync::LazyLock; use base_db::SourceDatabaseFileInputExt as _; use expect_test::Expect; use hir_def::{ - body::{Body, BodySourceMap, SyntheticSyntax}, + body::{Body, BodySourceMap}, db::DefDatabase, hir::{ExprId, Pat, PatId}, item_scope::ItemScope, nameres::DefMap, src::HasSource, - AssocItemId, DefWithBodyId, HasModule, LocalModuleId, Lookup, ModuleDefId, + AssocItemId, DefWithBodyId, HasModule, LocalModuleId, Lookup, ModuleDefId, SyntheticSyntax, }; use hir_expand::{db::ExpandDatabase, FileRange, InFile}; use itertools::Itertools; diff --git a/crates/hir-ty/src/utils.rs b/crates/hir-ty/src/utils.rs index 28bda1e10e..06719b09f7 100644 --- a/crates/hir-ty/src/utils.rs +++ b/crates/hir-ty/src/utils.rs @@ -185,7 +185,7 @@ fn direct_super_traits_cb(db: &dyn DefDatabase, trait_: TraitId, cb: impl FnMut( } }; match is_trait { - true => bound.as_path(), + true => bound.as_path(&generic_params.types_map), false => None, } } diff --git a/crates/hir/Cargo.toml b/crates/hir/Cargo.toml index 26666d6feb..6aadc5c4f7 100644 --- a/crates/hir/Cargo.toml +++ b/crates/hir/Cargo.toml @@ -33,6 +33,14 @@ syntax.workspace = true tt.workspace = true span.workspace = true +[dev-dependencies] +expect-test.workspace = true + +# local deps +test-utils.workspace = true +test-fixture.workspace = true +syntax-bridge.workspace = true + [features] in-rust-tree = ["hir-expand/in-rust-tree"] diff --git a/crates/hir/src/diagnostics.rs b/crates/hir/src/diagnostics.rs index 9ca021027d..612c6adb20 100644 --- a/crates/hir/src/diagnostics.rs +++ b/crates/hir/src/diagnostics.rs @@ -3,23 +3,35 @@ //! //! This probably isn't the best way to do this -- ideally, diagnostics should //! be expressed in terms of hir types themselves. -pub use hir_ty::diagnostics::{CaseType, IncorrectCase}; +use cfg::{CfgExpr, CfgOptions}; +use either::Either; +use hir_def::{ + hir::ExprOrPatId, + path::{hir_segment_to_ast_segment, ModPath}, + type_ref::TypesSourceMap, + AssocItemId, DefWithBodyId, SyntheticSyntax, +}; +use hir_expand::{name::Name, HirFileId, InFile}; use hir_ty::{ db::HirDatabase, diagnostics::{BodyValidationDiagnostic, UnsafetyReason}, - CastError, InferenceDiagnostic, + CastError, InferenceDiagnostic, InferenceTyDiagnosticSource, TyLoweringDiagnostic, + TyLoweringDiagnosticKind, +}; +use syntax::{ + ast::{self, HasGenericArgs}, + AstPtr, SyntaxError, SyntaxNodePtr, TextRange, }; - -use cfg::{CfgExpr, CfgOptions}; -use either::Either; -pub use hir_def::VariantId; -use hir_def::{body::SyntheticSyntax, hir::ExprOrPatId, path::ModPath, AssocItemId, DefWithBodyId}; -use hir_expand::{name::Name, HirFileId, InFile}; -use syntax::{ast, AstPtr, SyntaxError, SyntaxNodePtr, TextRange}; use triomphe::Arc; use crate::{AssocItem, Field, Local, Trait, Type}; +pub use hir_def::VariantId; +pub use hir_ty::{ + diagnostics::{CaseType, IncorrectCase}, + GenericArgsProhibitedReason, +}; + macro_rules! diagnostics { ($($diag:ident,)*) => { #[derive(Debug)] @@ -98,6 +110,7 @@ diagnostics![ UnresolvedIdent, UnusedMut, UnusedVariable, + GenericArgsProhibited, ]; #[derive(Debug)] @@ -388,6 +401,12 @@ pub struct InvalidCast { pub cast_ty: Type, } +#[derive(Debug)] +pub struct GenericArgsProhibited { + pub args: InFile<AstPtr<Either<ast::GenericArgList, ast::ParenthesizedArgList>>>, + pub reason: GenericArgsProhibitedReason, +} + impl AnyDiagnostic { pub(crate) fn body_validation_diagnostic( db: &dyn HirDatabase, @@ -527,6 +546,7 @@ impl AnyDiagnostic { db: &dyn HirDatabase, def: DefWithBodyId, d: &InferenceDiagnostic, + outer_types_source_map: &TypesSourceMap, source_map: &hir_def::body::BodySourceMap, ) -> Option<AnyDiagnostic> { let expr_syntax = |expr| { @@ -640,6 +660,44 @@ impl AnyDiagnostic { let cast_ty = Type::new(db, def, cast_ty.clone()); InvalidCast { expr, error: *error, expr_ty, cast_ty }.into() } + InferenceDiagnostic::TyDiagnostic { source, diag } => { + let source_map = match source { + InferenceTyDiagnosticSource::Body => &source_map.types, + InferenceTyDiagnosticSource::Signature => outer_types_source_map, + }; + Self::ty_diagnostic(diag, source_map, db)? + } + }) + } + + pub(crate) fn ty_diagnostic( + diag: &TyLoweringDiagnostic, + source_map: &TypesSourceMap, + db: &dyn HirDatabase, + ) -> Option<AnyDiagnostic> { + let source = match diag.source { + Either::Left(type_ref_id) => { + let Ok(source) = source_map.type_syntax(type_ref_id) else { + stdx::never!("error on synthetic type syntax"); + return None; + }; + source + } + Either::Right(source) => source, + }; + let syntax = || source.value.to_node(&db.parse_or_expand(source.file_id)); + Some(match diag.kind { + TyLoweringDiagnosticKind::GenericArgsProhibited { segment, reason } => { + let ast::Type::PathType(syntax) = syntax() else { return None }; + let segment = hir_segment_to_ast_segment(&syntax.path()?, segment)?; + let args = if let Some(generics) = segment.generic_arg_list() { + AstPtr::new(&generics).wrap_left() + } else { + AstPtr::new(&segment.parenthesized_arg_list()?).wrap_right() + }; + let args = source.with_value(args); + GenericArgsProhibited { args, reason }.into() + } }) } } diff --git a/crates/hir/src/display.rs b/crates/hir/src/display.rs index 9275f45d88..959d62d595 100644 --- a/crates/hir/src/display.rs +++ b/crates/hir/src/display.rs @@ -132,12 +132,18 @@ impl HirDisplay for Function { } else { match &data.types_map[data.ret_type] { TypeRef::ImplTrait(bounds) => match &bounds[0] { - TypeBound::Path(path, _) => Some( - *path.segments().iter().last().unwrap().args_and_bindings.unwrap().bindings - [0] - .type_ref - .as_ref() - .unwrap(), + &TypeBound::Path(path, _) => Some( + *data.types_map[path] + .segments() + .iter() + .last() + .unwrap() + .args_and_bindings + .unwrap() + .bindings[0] + .type_ref + .as_ref() + .unwrap(), ), _ => None, }, diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs index 0b2ba56b1f..10365ba002 100644 --- a/crates/hir/src/lib.rs +++ b/crates/hir/src/lib.rs @@ -20,12 +20,11 @@ #![cfg_attr(feature = "in-rust-tree", feature(rustc_private))] #![recursion_limit = "512"] -mod semantics; -mod source_analyzer; - mod attrs; mod from_id; mod has_source; +mod semantics; +mod source_analyzer; pub mod db; pub mod diagnostics; @@ -43,7 +42,7 @@ use arrayvec::ArrayVec; use base_db::{CrateDisplayName, CrateId, CrateOrigin}; use either::Either; use hir_def::{ - body::{BodyDiagnostic, SyntheticSyntax}, + body::BodyDiagnostic, data::adt::VariantData, generics::{LifetimeParamData, TypeOrConstParamData, TypeParamProvenance}, hir::{BindingAnnotation, BindingId, ExprId, ExprOrPatId, LabelId, Pat}, @@ -54,11 +53,12 @@ use hir_def::{ path::ImportAlias, per_ns::PerNs, resolver::{HasResolver, Resolver}, + type_ref::TypesSourceMap, AssocItemId, AssocItemLoc, AttrDefId, CallableDefId, ConstId, ConstParamId, CrateRootModuleId, DefWithBodyId, EnumId, EnumVariantId, ExternCrateId, FunctionId, GenericDefId, GenericParamId, HasModule, ImplId, InTypeConstId, ItemContainerId, LifetimeParamId, LocalFieldId, Lookup, - MacroExpander, ModuleId, StaticId, StructId, TraitAliasId, TraitId, TupleId, TypeAliasId, - TypeOrConstParamId, TypeParamId, UnionId, + MacroExpander, ModuleId, StaticId, StructId, SyntheticSyntax, TraitAliasId, TraitId, TupleId, + TypeAliasId, TypeOrConstParamId, TypeParamId, UnionId, }; use hir_expand::{ attrs::collect_attrs, proc_macro::ProcMacroKind, AstId, MacroCallKind, RenderedExpandError, @@ -76,8 +76,8 @@ use hir_ty::{ traits::FnTrait, AliasTy, CallableSig, Canonical, CanonicalVarKinds, Cast, ClosureId, GenericArg, GenericArgData, Interner, ParamKind, QuantifiedWhereClause, Scalar, Substitution, - TraitEnvironment, TraitRefExt, Ty, TyBuilder, TyDefId, TyExt, TyKind, ValueTyDefId, - WhereClause, + TraitEnvironment, TraitRefExt, Ty, TyBuilder, TyDefId, TyExt, TyKind, TyLoweringDiagnostic, + ValueTyDefId, WhereClause, }; use itertools::Itertools; use nameres::diagnostics::DefDiagnosticKind; @@ -89,7 +89,7 @@ use syntax::{ ast::{self, HasAttrs as _, HasGenericParams, HasName}, format_smolstr, AstNode, AstPtr, SmolStr, SyntaxNode, SyntaxNodePtr, TextRange, ToSmolStr, T, }; -use triomphe::Arc; +use triomphe::{Arc, ThinArc}; use crate::db::{DefDatabase, HirDatabase}; @@ -411,6 +411,10 @@ impl ModuleDef { } } + if let Some(def) = self.as_self_generic_def() { + def.diagnostics(db, &mut acc); + } + acc } @@ -431,6 +435,23 @@ impl ModuleDef { } } + /// Returns only defs that have generics from themselves, not their parent. + pub fn as_self_generic_def(self) -> Option<GenericDef> { + match self { + ModuleDef::Function(it) => Some(it.into()), + ModuleDef::Adt(it) => Some(it.into()), + ModuleDef::Trait(it) => Some(it.into()), + ModuleDef::TraitAlias(it) => Some(it.into()), + ModuleDef::TypeAlias(it) => Some(it.into()), + ModuleDef::Module(_) + | ModuleDef::Variant(_) + | ModuleDef::Static(_) + | ModuleDef::Const(_) + | ModuleDef::BuiltinType(_) + | ModuleDef::Macro(_) => None, + } + } + pub fn attrs(&self, db: &dyn HirDatabase) -> Option<AttrsWithOwner> { Some(match self { ModuleDef::Module(it) => it.attrs(db), @@ -605,17 +626,42 @@ impl Module { ModuleDef::Adt(adt) => { match adt { Adt::Struct(s) => { + let tree_id = s.id.lookup(db.upcast()).id; + let tree_source_maps = tree_id.item_tree_with_source_map(db.upcast()).1; + push_ty_diagnostics( + db, + acc, + db.field_types_with_diagnostics(s.id.into()).1, + tree_source_maps.strukt(tree_id.value).item(), + ); for diag in db.struct_data_with_diagnostics(s.id).1.iter() { emit_def_diagnostic(db, acc, diag, edition); } } Adt::Union(u) => { + let tree_id = u.id.lookup(db.upcast()).id; + let tree_source_maps = tree_id.item_tree_with_source_map(db.upcast()).1; + push_ty_diagnostics( + db, + acc, + db.field_types_with_diagnostics(u.id.into()).1, + tree_source_maps.union(tree_id.value).item(), + ); for diag in db.union_data_with_diagnostics(u.id).1.iter() { emit_def_diagnostic(db, acc, diag, edition); } } Adt::Enum(e) => { for v in e.variants(db) { + let tree_id = v.id.lookup(db.upcast()).id; + let tree_source_maps = + tree_id.item_tree_with_source_map(db.upcast()).1; + push_ty_diagnostics( + db, + acc, + db.field_types_with_diagnostics(v.id.into()).1, + tree_source_maps.variant(tree_id.value), + ); acc.extend(ModuleDef::Variant(v).diagnostics(db, style_lints)); for diag in db.enum_variant_data_with_diagnostics(v.id).1.iter() { emit_def_diagnostic(db, acc, diag, edition); @@ -626,6 +672,17 @@ impl Module { acc.extend(def.diagnostics(db, style_lints)) } ModuleDef::Macro(m) => emit_macro_def_diagnostics(db, acc, m), + ModuleDef::TypeAlias(type_alias) => { + let tree_id = type_alias.id.lookup(db.upcast()).id; + let tree_source_maps = tree_id.item_tree_with_source_map(db.upcast()).1; + push_ty_diagnostics( + db, + acc, + db.type_for_type_alias_with_diagnostics(type_alias.id).1, + tree_source_maps.type_alias(tree_id.value).item(), + ); + acc.extend(def.diagnostics(db, style_lints)); + } _ => acc.extend(def.diagnostics(db, style_lints)), } } @@ -635,8 +692,11 @@ impl Module { let mut impl_assoc_items_scratch = vec![]; for impl_def in self.impl_defs(db) { + GenericDef::Impl(impl_def).diagnostics(db, acc); + let loc = impl_def.id.lookup(db.upcast()); - let tree = loc.id.item_tree(db.upcast()); + let (tree, tree_source_maps) = loc.id.item_tree_with_source_map(db.upcast()); + let source_map = tree_source_maps.impl_(loc.id.value).item(); let node = &tree[loc.id.value]; let file_id = loc.id.file_id(); if file_id.macro_file().map_or(false, |it| it.is_builtin_derive(db.upcast())) { @@ -771,6 +831,19 @@ impl Module { impl_assoc_items_scratch.clear(); } + push_ty_diagnostics( + db, + acc, + db.impl_self_ty_with_diagnostics(impl_def.id).1, + source_map, + ); + push_ty_diagnostics( + db, + acc, + db.impl_trait_with_diagnostics(impl_def.id).and_then(|it| it.1), + source_map, + ); + for &item in db.impl_data(impl_def.id).items.iter() { AssocItem::from(item).diagnostics(db, acc, style_lints); } @@ -1802,6 +1875,25 @@ impl DefWithBody { let krate = self.module(db).id.krate(); let (body, source_map) = db.body_with_source_map(self.into()); + let item_tree_source_maps; + let outer_types_source_map = match self { + DefWithBody::Function(function) => { + let function = function.id.lookup(db.upcast()).id; + item_tree_source_maps = function.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.function(function.value).item() + } + DefWithBody::Static(statik) => { + let statik = statik.id.lookup(db.upcast()).id; + item_tree_source_maps = statik.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.statik(statik.value) + } + DefWithBody::Const(konst) => { + let konst = konst.id.lookup(db.upcast()).id; + item_tree_source_maps = konst.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.konst(konst.value) + } + DefWithBody::Variant(_) | DefWithBody::InTypeConst(_) => &TypesSourceMap::EMPTY, + }; for (_, def_map) in body.blocks(db.upcast()) { Module { id: def_map.module_id(DefMap::ROOT) }.diagnostics(db, acc, style_lints); @@ -1861,7 +1953,13 @@ impl DefWithBody { let infer = db.infer(self.into()); for d in &infer.diagnostics { - acc.extend(AnyDiagnostic::inference_diagnostic(db, self.into(), d, &source_map)); + acc.extend(AnyDiagnostic::inference_diagnostic( + db, + self.into(), + d, + outer_types_source_map, + &source_map, + )); } for (pat_or_expr, mismatch) in infer.type_mismatches() { @@ -3325,12 +3423,22 @@ impl AssocItem { ) { match self { AssocItem::Function(func) => { + GenericDef::Function(func).diagnostics(db, acc); DefWithBody::from(func).diagnostics(db, acc, style_lints); } AssocItem::Const(const_) => { DefWithBody::from(const_).diagnostics(db, acc, style_lints); } AssocItem::TypeAlias(type_alias) => { + GenericDef::TypeAlias(type_alias).diagnostics(db, acc); + let tree_id = type_alias.id.lookup(db.upcast()).id; + let tree_source_maps = tree_id.item_tree_with_source_map(db.upcast()).1; + push_ty_diagnostics( + db, + acc, + db.type_for_type_alias_with_diagnostics(type_alias.id).1, + tree_source_maps.type_alias(tree_id.value).item(), + ); for diag in hir_ty::diagnostics::incorrect_case(db, type_alias.id.into()) { acc.push(diag.into()); } @@ -3417,6 +3525,97 @@ impl GenericDef { }) .collect() } + + fn id(self) -> GenericDefId { + match self { + GenericDef::Function(it) => it.id.into(), + GenericDef::Adt(it) => it.into(), + GenericDef::Trait(it) => it.id.into(), + GenericDef::TraitAlias(it) => it.id.into(), + GenericDef::TypeAlias(it) => it.id.into(), + GenericDef::Impl(it) => it.id.into(), + GenericDef::Const(it) => it.id.into(), + } + } + + pub fn diagnostics(self, db: &dyn HirDatabase, acc: &mut Vec<AnyDiagnostic>) { + let def = self.id(); + + let item_tree_source_maps; + let (generics, generics_source_map) = db.generic_params_with_source_map(def); + + if generics.is_empty() && generics.no_predicates() { + return; + } + + let source_map = match &generics_source_map { + Some(it) => it, + None => match def { + GenericDefId::FunctionId(it) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.function(id.value).generics() + } + GenericDefId::AdtId(AdtId::EnumId(it)) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.enum_generic(id.value) + } + GenericDefId::AdtId(AdtId::StructId(it)) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.strukt(id.value).generics() + } + GenericDefId::AdtId(AdtId::UnionId(it)) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.union(id.value).generics() + } + GenericDefId::TraitId(it) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.trait_generic(id.value) + } + GenericDefId::TraitAliasId(it) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.trait_alias_generic(id.value) + } + GenericDefId::TypeAliasId(it) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.type_alias(id.value).generics() + } + GenericDefId::ImplId(it) => { + let id = it.lookup(db.upcast()).id; + item_tree_source_maps = id.item_tree_with_source_map(db.upcast()).1; + item_tree_source_maps.impl_(id.value).generics() + } + GenericDefId::ConstId(_) => return, + }, + }; + + push_ty_diagnostics(db, acc, db.generic_defaults_with_diagnostics(def).1, source_map); + push_ty_diagnostics( + db, + acc, + db.generic_predicates_without_parent_with_diagnostics(def).1, + source_map, + ); + for (param_id, param) in generics.iter_type_or_consts() { + if let TypeOrConstParamData::ConstParamData(_) = param { + push_ty_diagnostics( + db, + acc, + db.const_param_ty_with_diagnostics(ConstParamId::from_unchecked( + TypeOrConstParamId { parent: def, local_id: param_id }, + )) + .1, + source_map, + ); + } + } + } } /// A single local definition. @@ -5800,3 +5999,19 @@ pub enum DocLinkDef { Field(Field), SelfType(Trait), } + +fn push_ty_diagnostics( + db: &dyn HirDatabase, + acc: &mut Vec<AnyDiagnostic>, + diagnostics: Option<ThinArc<(), TyLoweringDiagnostic>>, + source_map: &TypesSourceMap, +) { + if let Some(diagnostics) = diagnostics { + acc.extend( + diagnostics + .slice + .iter() + .filter_map(|diagnostic| AnyDiagnostic::ty_diagnostic(diagnostic, source_map, db)), + ); + } +} diff --git a/crates/ide-diagnostics/src/handlers/generic_args_prohibited.rs b/crates/ide-diagnostics/src/handlers/generic_args_prohibited.rs new file mode 100644 index 0000000000..a319a0bcf6 --- /dev/null +++ b/crates/ide-diagnostics/src/handlers/generic_args_prohibited.rs @@ -0,0 +1,442 @@ +use either::Either; +use hir::GenericArgsProhibitedReason; +use ide_db::assists::Assist; +use ide_db::source_change::SourceChange; +use ide_db::text_edit::TextEdit; +use syntax::{ast, AstNode, TextRange}; + +use crate::{fix, Diagnostic, DiagnosticCode, DiagnosticsContext}; + +// Diagnostic: generic-args-prohibited +// +// This diagnostic is shown when generic arguments are provided for a type that does not accept +// generic arguments. +pub(crate) fn generic_args_prohibited( + ctx: &DiagnosticsContext<'_>, + d: &hir::GenericArgsProhibited, +) -> Diagnostic { + Diagnostic::new_with_syntax_node_ptr( + ctx, + DiagnosticCode::RustcHardError("E0109"), + describe_reason(d.reason), + d.args.map(Into::into), + ) + .with_fixes(fixes(ctx, d)) +} + +fn describe_reason(reason: GenericArgsProhibitedReason) -> String { + let kind = match reason { + GenericArgsProhibitedReason::Module => "modules", + GenericArgsProhibitedReason::TyParam => "type parameters", + GenericArgsProhibitedReason::SelfTy => "`Self`", + GenericArgsProhibitedReason::PrimitiveTy => "builtin types", + GenericArgsProhibitedReason::EnumVariant => { + return "you can specify generic arguments on either the enum or the variant, but not both" + .to_owned(); + } + }; + format!("generic arguments are not allowed on {kind}") +} + +fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::GenericArgsProhibited) -> Option<Vec<Assist>> { + let file_id = d.args.file_id.file_id()?; + let syntax = d.args.to_node(ctx.sema.db); + let range = match &syntax { + Either::Left(_) => syntax.syntax().text_range(), + Either::Right(param_list) => { + let path_segment = ast::PathSegment::cast(param_list.syntax().parent()?)?; + let start = if let Some(coloncolon) = path_segment.coloncolon_token() { + coloncolon.text_range().start() + } else { + param_list.syntax().text_range().start() + }; + let end = if let Some(ret_type) = path_segment.ret_type() { + ret_type.syntax().text_range().end() + } else { + param_list.syntax().text_range().end() + }; + TextRange::new(start, end) + } + }; + Some(vec![fix( + "remove_generic_args", + "Remove these generics", + SourceChange::from_text_edit(file_id, TextEdit::delete(range)), + syntax.syntax().text_range(), + )]) +} + +#[cfg(test)] +mod tests { + // This diagnostic was the first to be emitted in ty lowering, so the tests here also test + // diagnostics in ty lowering in general (which is why there are so many of them). + + use crate::tests::{check_diagnostics, check_fix}; + + #[test] + fn primitives() { + check_diagnostics( + r#" +//- /core.rs crate:core library +#![rustc_coherence_is_core] +impl str { + pub fn trim() {} +} + +//- /lib.rs crate:foo deps:core +fn bar<T>() {} + +fn foo() { + let _: (bool<()>, ()); + // ^^^^ 💡 error: generic arguments are not allowed on builtin types + let _ = <str<'_>>::trim; + // ^^^^ 💡 error: generic arguments are not allowed on builtin types + bar::<u32<{ const { 1 + 1 } }>>(); + // ^^^^^^^^^^^^^^^^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } + + #[test] + fn modules() { + check_diagnostics( + r#" +pub mod foo { + pub mod bar { + pub struct Baz; + + impl Baz { + pub fn qux() {} + } + } +} + +fn foo() { + let _: foo::<'_>::bar::Baz; + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + let _ = <foo::bar<()>::Baz>::qux; + // ^^^^ 💡 error: generic arguments are not allowed on modules +} + "#, + ); + } + + #[test] + fn type_parameters() { + check_diagnostics( + r#" +fn foo<T, U>() { + let _: T<'a>; + // ^^^^ 💡 error: generic arguments are not allowed on type parameters + let _: U::<{ 1 + 2 }>; + // ^^^^^^^^^^^^^ 💡 error: generic arguments are not allowed on type parameters +} + "#, + ); + } + + #[test] + fn fn_like_generic_args() { + check_diagnostics( + r#" +fn foo() { + let _: bool(bool, i32) -> (); + // ^^^^^^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } + + #[test] + fn fn_signature() { + check_diagnostics( + r#" +fn foo( + _a: bool<'_>, + // ^^^^ 💡 error: generic arguments are not allowed on builtin types + _b: i32::<i64>, + // ^^^^^^^ 💡 error: generic arguments are not allowed on builtin types + _c: &(&str<1>) + // ^^^ 💡 error: generic arguments are not allowed on builtin types +) -> ((), i32<bool>) { + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types + ((), 0) +} + "#, + ); + } + + #[test] + fn const_static_type() { + check_diagnostics( + r#" +const A: i32<bool> = 0; + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +static A: i32::<{ 1 + 3 }> = 0; + // ^^^^^^^^^^^^^ 💡 error: generic arguments are not allowed on builtin types + "#, + ); + } + + #[test] + fn fix() { + check_fix( + r#" +fn foo() { + let _: bool<'_, (), { 1 + 1 }>$0; +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + check_fix( + r#" +fn foo() { + let _: bool::$0<'_, (), { 1 + 1 }>; +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + check_fix( + r#" +fn foo() { + let _: bool(i$032); +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + check_fix( + r#" +fn foo() { + let _: bool$0(i32) -> i64; +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + check_fix( + r#" +fn foo() { + let _: bool::(i$032) -> i64; +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + check_fix( + r#" +fn foo() { + let _: bool::(i32)$0; +}"#, + r#" +fn foo() { + let _: bool; +}"#, + ); + } + + #[test] + fn in_fields() { + check_diagnostics( + r#" +struct A(bool<i32>); + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +struct B { v: bool<(), 1> } + // ^^^^^^^ 💡 error: generic arguments are not allowed on builtin types +union C { + a: bool<i32>, + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + b: i32<bool>, + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types + } +enum D { + A(bool<i32>), + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + B { v: i32<bool> }, + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } + + #[test] + fn in_generics() { + check_diagnostics( + r#" +mod foo { + pub trait Trait {} +} + +struct A<A: foo::<()>::Trait>(A) + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait; + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +union B<A: foo::<()>::Trait> + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +{ a: A } +enum C<A: foo::<()>::Trait> + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +{} + +fn f<A: foo::<()>::Trait>() + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +{} + +type D<A: foo::<()>::Trait> = A + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait; + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + +trait E<A: foo::<()>::Trait> + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +{ + fn f<B: foo::<()>::Trait>() + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + {} + + type D<B: foo::<()>::Trait> = A + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait; + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + +impl<A: foo::<()>::Trait> E for () + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +{ + fn f<B: foo::<()>::Trait>() + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + {} + + type D<B: foo::<()>::Trait> = A + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + where bool<i32>: foo::Trait; + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } + + #[test] + fn assoc_items() { + check_diagnostics( + r#" +struct Foo; + +trait Trait { + fn f() -> bool<i32> { true } + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + type T = i32<bool>; + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + +impl Trait for Foo { + fn f() -> bool<i32> { true } + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + type T = i32<bool>; + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + +impl Foo { + fn f() -> bool<i32> { true } + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + type T = i32<bool>; + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } + + #[test] + fn const_param_ty() { + check_diagnostics( + r#" +fn foo< + const A: bool<i32>, + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + B, + C, + const D: bool<i32>, + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + const E: bool<i32>, + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +>() {} + "#, + ); + } + + #[test] + fn generic_defaults() { + check_diagnostics( + r#" +struct Foo<A = bool<i32>>(A); + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + "#, + ); + } + + #[test] + fn impl_self_ty() { + check_diagnostics( + r#" +struct Foo<A>(A); +trait Trait {} +impl Foo<bool<i32>> {} + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +impl Trait for Foo<bool<i32>> {} + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types + "#, + ); + } + + #[test] + fn impl_trait() { + check_diagnostics( + r#" +mod foo { + pub trait Trait {} +} +impl foo::<()>::Trait for () {} + // ^^^^^^ 💡 error: generic arguments are not allowed on modules + "#, + ); + } + + #[test] + fn type_alias() { + check_diagnostics( + r#" +pub trait Trait { + type Assoc; +} +type T = bool<i32>; + // ^^^^^ 💡 error: generic arguments are not allowed on builtin types +impl Trait for () { + type Assoc = i32<bool>; + // ^^^^^^ 💡 error: generic arguments are not allowed on builtin types +} + "#, + ); + } +} diff --git a/crates/ide-diagnostics/src/handlers/unresolved_method.rs b/crates/ide-diagnostics/src/handlers/unresolved_method.rs index 81cb452121..4ab649cc16 100644 --- a/crates/ide-diagnostics/src/handlers/unresolved_method.rs +++ b/crates/ide-diagnostics/src/handlers/unresolved_method.rs @@ -167,9 +167,9 @@ fn assoc_func_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) - } let method_name = call.name_ref()?; - let assoc_func_call = format!("{receiver_type_adt_name}::{method_name}()"); + let assoc_func_path = format!("{receiver_type_adt_name}::{method_name}"); - let assoc_func_call = make::expr_path(make::path_from_text(&assoc_func_call)); + let assoc_func_path = make::expr_path(make::path_from_text(&assoc_func_path)); let args: Vec<_> = if need_to_take_receiver_as_first_arg { std::iter::once(receiver).chain(call.arg_list()?.args()).collect() @@ -178,7 +178,7 @@ fn assoc_func_fix(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedMethodCall) - }; let args = make::arg_list(args); - let assoc_func_call_expr_string = make::expr_call(assoc_func_call, args).to_string(); + let assoc_func_call_expr_string = make::expr_call(assoc_func_path, args).to_string(); let file_id = ctx.sema.original_range_opt(call.receiver()?.syntax())?.file_id; diff --git a/crates/ide-diagnostics/src/lib.rs b/crates/ide-diagnostics/src/lib.rs index 1f1b6478d3..663fc6a677 100644 --- a/crates/ide-diagnostics/src/lib.rs +++ b/crates/ide-diagnostics/src/lib.rs @@ -27,6 +27,7 @@ mod handlers { pub(crate) mod await_outside_of_async; pub(crate) mod break_outside_of_loop; pub(crate) mod expected_function; + pub(crate) mod generic_args_prohibited; pub(crate) mod inactive_code; pub(crate) mod incoherent_impl; pub(crate) mod incorrect_case; @@ -468,6 +469,7 @@ pub fn semantic_diagnostics( Some(it) => it, None => continue, }, + AnyDiagnostic::GenericArgsProhibited(d) => handlers::generic_args_prohibited::generic_args_prohibited(&ctx, &d) }; res.push(d) } diff --git a/crates/rust-analyzer/src/cli/analysis_stats.rs b/crates/rust-analyzer/src/cli/analysis_stats.rs index 802d0c69a4..e3ea441f3a 100644 --- a/crates/rust-analyzer/src/cli/analysis_stats.rs +++ b/crates/rust-analyzer/src/cli/analysis_stats.rs @@ -13,8 +13,9 @@ use hir::{ ModuleDef, Name, }; use hir_def::{ - body::{BodySourceMap, SyntheticSyntax}, + body::BodySourceMap, hir::{ExprId, PatId}, + SyntheticSyntax, }; use hir_ty::{Interner, Substitution, TyExt, TypeFlags}; use ide::{ diff --git a/crates/syntax/src/ast/make.rs b/crates/syntax/src/ast/make.rs index 2ec83d23b2..7eb3e08f54 100644 --- a/crates/syntax/src/ast/make.rs +++ b/crates/syntax/src/ast/make.rs @@ -402,7 +402,7 @@ pub fn join_paths(paths: impl IntoIterator<Item = ast::Path>) -> ast::Path { // FIXME: should not be pub pub fn path_from_text(text: &str) -> ast::Path { - ast_from_text(&format!("fn main() {{ let test = {text}; }}")) + ast_from_text(&format!("fn main() {{ let test: {text}; }}")) } pub fn use_tree_glob() -> ast::UseTree { |