From e75dbe52a1d871f6a6cd0fe7a86f82486a09ab1f Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Tue, 16 Jul 2024 22:10:42 +0200
Subject: [PATCH] Don't call macro_arg directly in
 `ExpandDatabase::syntax_context`

---
 crates/hir-expand/src/db.rs    | 12 +++++++++---
 crates/hir-expand/src/eager.rs |  1 +
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/crates/hir-expand/src/db.rs b/crates/hir-expand/src/db.rs
index e1fb3953f4d2..fbc6e638d7d3 100644
--- a/crates/hir-expand/src/db.rs
+++ b/crates/hir-expand/src/db.rs
@@ -21,8 +21,8 @@ use crate::{
     span_map::{RealSpanMap, SpanMap, SpanMapRef},
     tt, AstId, BuiltinAttrExpander, BuiltinDeriveExpander, BuiltinFnLikeExpander,
     CustomProcMacroExpander, EagerCallInfo, ExpandError, ExpandResult, ExpandTo, ExpansionSpanMap,
-    HirFileId, HirFileIdRepr, MacroCallId, MacroCallKind, MacroCallLoc, MacroDefId, MacroDefKind,
-    MacroFileId,
+    HirFileId, HirFileIdRepr, Lookup, MacroCallId, MacroCallKind, MacroCallLoc, MacroDefId,
+    MacroDefKind, MacroFileId,
 };
 /// This is just to ensure the types of smart_macro_arg and macro_arg are the same
 type MacroArgResult = (Arc<tt::Subtree>, SyntaxFixupUndoInfo, Span);
@@ -99,6 +99,7 @@ pub trait ExpandDatabase: SourceDatabase {
     /// Lowers syntactic macro call to a token tree representation. That's a firewall
     /// query, only typing in the macro call itself changes the returned
     /// subtree.
+    #[deprecated = "calling this is incorrect, call `macro_arg_considering_derives` instead"]
     fn macro_arg(&self, id: MacroCallId) -> MacroArgResult;
     #[salsa::transparent]
     fn macro_arg_considering_derives(
@@ -140,7 +141,11 @@ pub trait ExpandDatabase: SourceDatabase {
 fn syntax_context(db: &dyn ExpandDatabase, file: HirFileId) -> SyntaxContextId {
     match file.repr() {
         HirFileIdRepr::FileId(_) => SyntaxContextId::ROOT,
-        HirFileIdRepr::MacroFile(m) => db.macro_arg(m.macro_call_id).2.ctx,
+        HirFileIdRepr::MacroFile(m) => {
+            db.macro_arg_considering_derives(m.macro_call_id, &m.macro_call_id.lookup(db).kind)
+                .2
+                .ctx
+        }
     }
 }
 
@@ -393,6 +398,7 @@ pub(crate) fn parse_with_map(
 /// Other wise return the [macro_arg] for the macro_call_id.
 ///
 /// This is not connected to the database so it does not cached the result. However, the inner [macro_arg] query is
+#[allow(deprecated)] // we are macro_arg_considering_derives
 fn macro_arg_considering_derives(
     db: &dyn ExpandDatabase,
     id: MacroCallId,
diff --git a/crates/hir-expand/src/eager.rs b/crates/hir-expand/src/eager.rs
index 3e0d2dfa6c17..6a4e235b53fc 100644
--- a/crates/hir-expand/src/eager.rs
+++ b/crates/hir-expand/src/eager.rs
@@ -54,6 +54,7 @@ pub fn expand_eager_macro_input(
         ctxt: call_site,
     }
     .intern(db);
+    #[allow(deprecated)] // builtin eager macros are never derives
     let (_, _, span) = db.macro_arg(arg_id);
     let ExpandResult { value: (arg_exp, arg_exp_map), err: parse_err } =
         db.parse_macro_expansion(arg_id.as_macro_file());