Don't parse intra doc links as syntax trees

crates/hir-def/src/visibility.rs

@@ -4,7 +4,6 @@ use std::iter;
 
 use hir_expand::{span_map::SpanMapRef, InFile};
 use la_arena::ArenaMap;
-use stdx::assert_eq_size;
 use syntax::ast;
 use triomphe::Arc;
 
@@ -25,7 +24,6 @@ pub enum RawVisibility {
     /// `pub`.
     Public,
 }
-assert_eq_size!(RawVisibility, 48);
 
 impl RawVisibility {
     pub(crate) const fn private() -> RawVisibility {

crates/hir-expand/src/lib.rs

@@ -26,7 +26,6 @@ pub mod span_map;
 mod fixup;
 
 use attrs::collect_attrs;
-use stdx::assert_eq_size;
 use triomphe::Arc;
 
 use std::{fmt, hash::Hash};
@@ -176,7 +175,6 @@ pub struct MacroCallLoc {
     pub kind: MacroCallKind,
     pub call_site: Span,
 }
-assert_eq_size!(MacroCallLoc, 104);
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct MacroDefId {
@@ -187,7 +185,6 @@ pub struct MacroDefId {
     pub allow_internal_unsafe: bool,
     pub span: Span,
 }
-assert_eq_size!(MacroDefId, 44);
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum MacroDefKind {

crates/hir-expand/src/mod_path.rs

@@ -15,7 +15,6 @@ use crate::{
 use base_db::CrateId;
 use smallvec::SmallVec;
 use span::SyntaxContextId;
-use stdx::assert_eq_size;
 use syntax::{ast, AstNode};
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -23,7 +22,6 @@ pub struct ModPath {
     pub kind: PathKind,
     segments: SmallVec<[Name; 1]>,
 }
-assert_eq_size!(ModPath, 40);
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct UnescapedModPath<'a>(&'a ModPath);

crates/hir-expand/src/name.rs

@@ -2,7 +2,6 @@
 
 use std::fmt;
 
-use stdx::assert_eq_size;
 use syntax::{ast, format_smolstr, utils::is_raw_identifier, SmolStr};
 
 /// `Name` is a wrapper around string, which is used in hir for both references
@@ -14,7 +13,6 @@ use syntax::{ast, format_smolstr, utils::is_raw_identifier, SmolStr};
 /// name without "r#".
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
 pub struct Name(Repr);
-assert_eq_size!(Name, 24);
 
 /// Wrapper of `Name` to print the name without "r#" even when it is a raw identifier.
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]

crates/hir/src/attrs.rs

@@ -2,7 +2,6 @@
 
 use std::ops::ControlFlow;
 
-use base_db::FileId;
 use hir_def::{
     attr::AttrsWithOwner,
     item_scope::ItemInNs,
@@ -11,12 +10,8 @@ use hir_def::{
     resolver::{HasResolver, Resolver, TypeNs},
     AssocItemId, AttrDefId, ModuleDefId,
 };
-use hir_expand::{
-    name::Name,
-    span_map::{RealSpanMap, SpanMapRef},
-};
+use hir_expand::{mod_path::PathKind, name::Name};
 use hir_ty::{db::HirDatabase, method_resolution};
-use syntax::{ast, AstNode};
 
 use crate::{
     Adt, AsAssocItem, AssocItem, BuiltinType, Const, ConstParam, DocLinkDef, Enum, ExternCrateDecl,
@@ -129,7 +124,7 @@ fn resolve_doc_path_on_(
         AttrDefId::GenericParamId(_) => return None,
     };
 
-    let mut modpath = modpath_from_str(db, link)?;
+    let mut modpath = modpath_from_str(link)?;
 
     let resolved = resolver.resolve_module_path_in_items(db.upcast(), &modpath);
     if resolved.is_none() {
@@ -305,34 +300,37 @@ fn as_module_def_if_namespace_matches(
     (ns.unwrap_or(expected_ns) == expected_ns).then(|| DocLinkDef::ModuleDef(def))
 }
 
-fn modpath_from_str(db: &dyn HirDatabase, link: &str) -> Option<ModPath> {
+fn modpath_from_str(link: &str) -> Option<ModPath> {
     // FIXME: this is not how we should get a mod path here.
     let try_get_modpath = |link: &str| {
-        let ast_path = ast::SourceFile::parse(&format!("type T = {link};"))
-            .syntax_node()
-            .descendants()
-            .find_map(ast::Path::cast)?;
-        if ast_path.syntax().text() != link {
-            return None;
+        let mut parts = link.split("::");
+        let mut first_segment = None;
+        let kind = match parts.next()? {
+            "" => PathKind::Abs,
+            "crate" => PathKind::Crate,
+            "self" => PathKind::Super(0),
+            "super" => {
+                let mut deg = 1;
+                while let Some(segment) = parts.next() {
+                    if segment == "super" {
+                        deg += 1;
+                    } else {
+                        first_segment = Some(segment);
+                        break;
+                    }
+                }
+                PathKind::Super(deg)
+            }
+            segment => {
+                first_segment = Some(segment);
+                PathKind::Plain
             }
-        ModPath::from_src(
-            db.upcast(),
-            ast_path,
-            SpanMapRef::RealSpanMap(&RealSpanMap::absolute(FileId::BOGUS)),
-        )
         };
-
-    let full = try_get_modpath(link);
-    if full.is_some() {
-        return full;
-    }
-
-    // Tuple field names cannot be a part of `ModPath` usually, but rustdoc can
-    // resolve doc paths like `TupleStruct::0`.
-    // FIXME: Find a better way to handle these.
-    let (base, maybe_tuple_field) = link.rsplit_once("::")?;
-    let tuple_field = Name::new_tuple_field(maybe_tuple_field.parse().ok()?);
-    let mut modpath = try_get_modpath(base)?;
-    modpath.push_segment(tuple_field);
-    Some(modpath)
+        let parts = first_segment.into_iter().chain(parts).map(|segment| match segment.parse() {
+            Ok(idx) => Name::new_tuple_field(idx),
+            Err(_) => Name::new_text_dont_use(segment.into()),
+        });
+        Some(ModPath::from_segments(kind, parts))
+    };
+    try_get_modpath(link)
 }

crates/proc-macro-srv/src/server/token_id.rs

@@ -206,7 +206,7 @@ impl server::TokenStream for TokenIdServer {
                     stream: if subtree.token_trees.is_empty() {
                         None
                     } else {
-                        Some(subtree.token_trees)
+                        Some(TokenStream { token_trees: subtree.token_trees })
                     },
                     span: bridge::DelimSpan::from_single(subtree.delimiter.open),
                 }),

crates/span/src/lib.rs

@@ -2,7 +2,6 @@
 use std::fmt::{self, Write};
 
 use salsa::InternId;
-use stdx::assert_eq_size;
 
 mod map;
 
@@ -36,7 +35,6 @@ pub const FIXUP_ERASED_FILE_AST_ID_MARKER: ErasedFileAstId =
     la_arena::Idx::from_raw(la_arena::RawIdx::from_u32(!0 - 1));
 
 pub type Span = SpanData<SyntaxContextId>;
-assert_eq_size!(Span, 20);
 
 #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
 pub struct SpanData<Ctx> {

crates/stdx/src/macros.rs

@@ -59,12 +59,3 @@ macro_rules! impl_from {
         )*
     }
 }
-
-#[macro_export]
-macro_rules! assert_eq_size {
-    ($($ty:ty,)+ $val:expr $(,)?) => {
-        const _: () = {
-            $(core::mem::transmute::<[u8; $val], $ty>;)+
-        };
-    };
-}