Rename some things and turn macro to macro def into a query

Author: Veykril

crates/hir-def/src/body/lower.rs

@@ -959,20 +959,29 @@ impl ExprCollector<'_> {
         // File containing the macro call. Expansion errors will be attached here.
         let outer_file = self.expander.current_file_id;
 
-        let macro_call_ptr = self.expander.to_source(AstPtr::new(&mcall));
+        let macro_call_ptr = self.expander.to_source(syntax_ptr);
         let module = self.expander.module.local_id;
-        let res = self.expander.enter_expand(self.db, mcall, |path| {
-            self.def_map
-                .resolve_path(
-                    self.db,
-                    module,
-                    &path,
-                    crate::item_scope::BuiltinShadowMode::Other,
-                    Some(MacroSubNs::Bang),
-                )
-                .0
-                .take_macros()
-        });
+
+        let res = match self.def_map.modules[module]
+            .scope
+            .macro_invocations
+            .get(&InFile::new(outer_file, self.ast_id_map.ast_id_for_ptr(syntax_ptr)))
+        {
+            // fast path, macro call is in a block module
+            Some(&call) => Ok(self.expander.enter_expand_id(self.db, call)),
+            None => self.expander.enter_expand(self.db, mcall, |path| {
+                self.def_map
+                    .resolve_path(
+                        self.db,
+                        module,
+                        &path,
+                        crate::item_scope::BuiltinShadowMode::Other,
+                        Some(MacroSubNs::Bang),
+                    )
+                    .0
+                    .take_macros()
+            }),
+        };
 
         let res = match res {
             Ok(res) => res,
@@ -986,7 +995,6 @@ impl ExprCollector<'_> {
                 return collector(self, None);
             }
         };
-
         if record_diagnostics {
             match &res.err {
                 Some(ExpandError::UnresolvedProcMacro(krate)) => {

crates/hir-def/src/data.rs

@@ -16,7 +16,7 @@ use crate::{
     db::DefDatabase,
     expander::{Expander, Mark},
     item_tree::{self, AssocItem, FnFlags, ItemTree, ItemTreeId, MacroCall, ModItem, TreeId},
-    macro_call_as_call_id, macro_id_to_def_id,
+    macro_call_as_call_id,
     nameres::{
         attr_resolution::ResolvedAttr,
         diagnostics::DefDiagnostic,
@@ -720,7 +720,7 @@ impl<'a> AssocItemCollector<'a> {
                         )
                         .0
                         .take_macros()
-                        .map(|it| macro_id_to_def_id(self.db, it))
+                        .map(|it| self.db.macro_def(it))
                 };
                 match macro_call_as_call_id(
                     self.db.upcast(),

crates/hir-def/src/db.rs

@@ -1,7 +1,7 @@
 //! Defines database & queries for name resolution.
 use base_db::{salsa, CrateId, SourceDatabase, Upcast};
 use either::Either;
-use hir_expand::{db::ExpandDatabase, HirFileId};
+use hir_expand::{db::ExpandDatabase, HirFileId, MacroDefId};
 use intern::Interned;
 use la_arena::ArenaMap;
 use syntax::{ast, AstPtr};
@@ -24,9 +24,9 @@ use crate::{
     AttrDefId, BlockId, BlockLoc, ConstBlockId, ConstBlockLoc, ConstId, ConstLoc, DefWithBodyId,
     EnumId, EnumLoc, ExternBlockId, ExternBlockLoc, ExternCrateId, ExternCrateLoc, FunctionId,
     FunctionLoc, GenericDefId, ImplId, ImplLoc, InTypeConstId, InTypeConstLoc, LocalEnumVariantId,
-    LocalFieldId, Macro2Id, Macro2Loc, MacroRulesId, MacroRulesLoc, ProcMacroId, ProcMacroLoc,
-    StaticId, StaticLoc, StructId, StructLoc, TraitAliasId, TraitAliasLoc, TraitId, TraitLoc,
-    TypeAliasId, TypeAliasLoc, UnionId, UnionLoc, UseId, UseLoc, VariantId,
+    LocalFieldId, Macro2Id, Macro2Loc, MacroId, MacroRulesId, MacroRulesLoc, ProcMacroId,
+    ProcMacroLoc, StaticId, StaticLoc, StructId, StructLoc, TraitAliasId, TraitAliasLoc, TraitId,
+    TraitLoc, TypeAliasId, TypeAliasLoc, UnionId, UnionLoc, UseId, UseLoc, VariantId,
 };
 
 #[salsa::query_group(InternDatabaseStorage)]
@@ -110,6 +110,8 @@ pub trait DefDatabase: InternDatabase + ExpandDatabase + Upcast<dyn ExpandDataba
     #[salsa::invoke(DefMap::block_def_map_query)]
     fn block_def_map(&self, block: BlockId) -> Arc<DefMap>;
 
+    fn macro_def(&self, m: MacroId) -> MacroDefId;
+
     // region:data
 
     #[salsa::invoke(StructData::struct_data_query)]
@@ -305,3 +307,63 @@ fn crate_supports_no_std(db: &dyn DefDatabase, crate_id: CrateId) -> bool {
 
     false
 }
+
+fn macro_def(db: &dyn DefDatabase, id: MacroId) -> MacroDefId {
+    use hir_expand::InFile;
+
+    use crate::{Lookup, MacroDefKind, MacroExpander};
+
+    let kind = |expander, file_id, m| {
+        let in_file = InFile::new(file_id, m);
+        match expander {
+            MacroExpander::Declarative => MacroDefKind::Declarative(in_file),
+            MacroExpander::BuiltIn(it) => MacroDefKind::BuiltIn(it, in_file),
+            MacroExpander::BuiltInAttr(it) => MacroDefKind::BuiltInAttr(it, in_file),
+            MacroExpander::BuiltInDerive(it) => MacroDefKind::BuiltInDerive(it, in_file),
+            MacroExpander::BuiltInEager(it) => MacroDefKind::BuiltInEager(it, in_file),
+        }
+    };
+
+    match id {
+        MacroId::Macro2Id(it) => {
+            let loc = it.lookup(db);
+
+            let item_tree = loc.id.item_tree(db);
+            let makro = &item_tree[loc.id.value];
+            MacroDefId {
+                krate: loc.container.krate,
+                kind: kind(loc.expander, loc.id.file_id(), makro.ast_id.upcast()),
+                local_inner: false,
+                allow_internal_unsafe: loc.allow_internal_unsafe,
+            }
+        }
+        MacroId::MacroRulesId(it) => {
+            let loc = it.lookup(db);
+
+            let item_tree = loc.id.item_tree(db);
+            let makro = &item_tree[loc.id.value];
+            MacroDefId {
+                krate: loc.container.krate,
+                kind: kind(loc.expander, loc.id.file_id(), makro.ast_id.upcast()),
+                local_inner: loc.local_inner,
+                allow_internal_unsafe: loc.allow_internal_unsafe,
+            }
+        }
+        MacroId::ProcMacroId(it) => {
+            let loc = it.lookup(db);
+
+            let item_tree = loc.id.item_tree(db);
+            let makro = &item_tree[loc.id.value];
+            MacroDefId {
+                krate: loc.container.krate,
+                kind: MacroDefKind::ProcMacro(
+                    loc.expander,
+                    loc.kind,
+                    InFile::new(loc.id.file_id(), makro.ast_id),
+                ),
+                local_inner: false,
+                allow_internal_unsafe: false,
+            }
+        }
+    }
+}

crates/hir-def/src/expander.rs

@@ -11,8 +11,8 @@ use limit::Limit;
 use syntax::{ast, Parse, SyntaxNode};
 
 use crate::{
-    attr::Attrs, db::DefDatabase, lower::LowerCtx, macro_id_to_def_id, path::Path, AsMacroCall,
-    MacroId, ModuleId, UnresolvedMacro,
+    attr::Attrs, db::DefDatabase, lower::LowerCtx, path::Path, AsMacroCall, MacroId, ModuleId,
+    UnresolvedMacro,
 };
 
 #[derive(Debug)]
@@ -58,7 +58,7 @@ impl Expander {
         let result = self.within_limit(db, |this| {
             let macro_call = InFile::new(this.current_file_id, &macro_call);
             match macro_call.as_call_id_with_errors(db.upcast(), this.module.krate(), |path| {
-                resolver(path).map(|it| macro_id_to_def_id(db, it))
+                resolver(path).map(|it| db.macro_def(it))
             }) {
                 Ok(call_id) => call_id,
                 Err(resolve_err) => {

crates/hir-def/src/item_scope.rs

@@ -102,8 +102,10 @@ pub struct ItemScope {
     // FIXME: Macro shadowing in one module is not properly handled. Non-item place macros will
     // be all resolved to the last one defined if shadowing happens.
     legacy_macros: FxHashMap<Name, SmallVec<[MacroId; 1]>>,
-    /// The derive macro invocations in this scope.
+    /// The attribute macro invocations in this scope.
     attr_macros: FxHashMap<AstId<ast::Item>, MacroCallId>,
+    /// The macro invocations in this scope.
+    pub macro_invocations: FxHashMap<AstId<ast::MacroCall>, MacroCallId>,
     /// The derive macro invocations in this scope, keyed by the owner item over the actual derive attributes
     /// paired with the derive macro invocations for the specific attribute.
     derive_macros: FxHashMap<AstId<ast::Adt>, SmallVec<[DeriveMacroInvocation; 1]>>,
@@ -345,6 +347,10 @@ impl ItemScope {
         self.attr_macros.insert(item, call);
     }
 
+    pub(crate) fn add_macro_invoc(&mut self, call: AstId<ast::MacroCall>, call_id: MacroCallId) {
+        self.macro_invocations.insert(call, call_id);
+    }
+
     pub(crate) fn attr_macro_invocs(
         &self,
     ) -> impl Iterator<Item = (AstId<ast::Item>, MacroCallId)> + '_ {
@@ -692,6 +698,7 @@ impl ItemScope {
             use_imports_values,
             use_imports_types,
             use_imports_macros,
+            macro_invocations,
         } = self;
         types.shrink_to_fit();
         values.shrink_to_fit();
@@ -709,6 +716,7 @@ impl ItemScope {
         derive_macros.shrink_to_fit();
         extern_crate_decls.shrink_to_fit();
         use_decls.shrink_to_fit();
+        macro_invocations.shrink_to_fit();
     }
 }
 

crates/hir-def/src/item_tree.rs

@@ -29,6 +29,9 @@
 //!
 //! In general, any item in the `ItemTree` stores its `AstId`, which allows mapping it back to its
 //! surface syntax.
+//!
+//! Note that we cannot store [`span::Span`]s inside of this, as typing in an item invalidates its
+//! encompassing span!
 
 mod lower;
 mod pretty;
@@ -281,7 +284,7 @@ struct ItemTreeData {
     mods: Arena<Mod>,
     macro_calls: Arena<MacroCall>,
     macro_rules: Arena<MacroRules>,
-    macro_defs: Arena<MacroDef>,
+    macro_defs: Arena<Macro2>,
 
     vis: ItemVisibilities,
 }
@@ -514,7 +517,7 @@ mod_items! {
     Mod in mods -> ast::Module,
     MacroCall in macro_calls -> ast::MacroCall,
     MacroRules in macro_rules -> ast::MacroRules,
-    MacroDef in macro_defs -> ast::MacroDef,
+    Macro2 in macro_defs -> ast::MacroDef,
 }
 
 macro_rules! impl_index {
@@ -747,6 +750,7 @@ pub struct MacroCall {
     pub path: Interned<ModPath>,
     pub ast_id: FileAstId<ast::MacroCall>,
     pub expand_to: ExpandTo,
+    // FIXME: We need to move this out. It invalidates the item tree when typing inside the macro call.
     pub call_site: Span,
 }
 
@@ -759,7 +763,7 @@ pub struct MacroRules {
 
 /// "Macros 2.0" macro definition.
 #[derive(Debug, Clone, Eq, PartialEq)]
-pub struct MacroDef {
+pub struct Macro2 {
     pub name: Name,
     pub visibility: RawVisibilityId,
     pub ast_id: FileAstId<ast::MacroDef>,
@@ -918,7 +922,7 @@ impl ModItem {
             | ModItem::Impl(_)
             | ModItem::Mod(_)
             | ModItem::MacroRules(_)
-            | ModItem::MacroDef(_) => None,
+            | ModItem::Macro2(_) => None,
             ModItem::MacroCall(call) => Some(AssocItem::MacroCall(*call)),
             ModItem::Const(konst) => Some(AssocItem::Const(*konst)),
             ModItem::TypeAlias(alias) => Some(AssocItem::TypeAlias(*alias)),
@@ -944,7 +948,7 @@ impl ModItem {
             ModItem::Mod(it) => tree[it.index()].ast_id().upcast(),
             ModItem::MacroCall(it) => tree[it.index()].ast_id().upcast(),
             ModItem::MacroRules(it) => tree[it.index()].ast_id().upcast(),
-            ModItem::MacroDef(it) => tree[it.index()].ast_id().upcast(),
+            ModItem::Macro2(it) => tree[it.index()].ast_id().upcast(),
         }
     }
 }

crates/hir-def/src/item_tree/lower.rs

@@ -562,13 +562,13 @@ impl<'a> Ctx<'a> {
         Some(id(self.data().macro_rules.alloc(res)))
     }
 
-    fn lower_macro_def(&mut self, m: &ast::MacroDef) -> Option<FileItemTreeId<MacroDef>> {
+    fn lower_macro_def(&mut self, m: &ast::MacroDef) -> Option<FileItemTreeId<Macro2>> {
         let name = m.name().map(|it| it.as_name())?;
 
         let ast_id = self.source_ast_id_map.ast_id(m);
         let visibility = self.lower_visibility(m);
 
-        let res = MacroDef { name, ast_id, visibility };
+        let res = Macro2 { name, ast_id, visibility };
         Some(id(self.data().macro_defs.alloc(res)))
     }
 

crates/hir-def/src/item_tree/pretty.rs

@@ -464,8 +464,8 @@ impl Printer<'_> {
                 let MacroRules { name, ast_id: _ } = &self.tree[it];
                 wln!(self, "macro_rules! {} {{ ... }}", name.display(self.db.upcast()));
             }
-            ModItem::MacroDef(it) => {
-                let MacroDef { name, visibility, ast_id: _ } = &self.tree[it];
+            ModItem::Macro2(it) => {
+                let Macro2 { name, visibility, ast_id: _ } = &self.tree[it];
                 self.print_visibility(*visibility);
                 wln!(self, "macro {} {{ ... }}", name.display(self.db.upcast()));
             }