Remove ExpressionStoreDiagnostics::MacroError, instead recreate it from the MacroCallId

This simplifies the code and also makes us report parse error in macros too.

crates/hir-def/src/expr_store.rs

@@ -16,7 +16,7 @@ use std::{
 
 use cfg::{CfgExpr, CfgOptions};
 use either::Either;
-use hir_expand::{ExpandError, InFile, MacroCallId, mod_path::ModPath, name::Name};
+use hir_expand::{InFile, MacroCallId, mod_path::ModPath, name::Name};
 use la_arena::{Arena, ArenaMap};
 use rustc_hash::FxHashMap;
 use smallvec::SmallVec;
@@ -281,7 +281,6 @@ struct FormatTemplate {
 #[derive(Debug, Eq, PartialEq)]
 pub enum ExpressionStoreDiagnostics {
     InactiveCode { node: InFile<SyntaxNodePtr>, cfg: CfgExpr, opts: CfgOptions },
-    MacroError { node: InFile<MacroCallPtr>, err: ExpandError },
     UnresolvedMacroCall { node: InFile<MacroCallPtr>, path: ModPath },
     UnreachableLabel { node: InFile<AstPtr<ast::Lifetime>>, name: Name },
     AwaitOutsideOfAsync { node: InFile<AstPtr<ast::AwaitExpr>>, location: String },

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

@@ -1981,13 +1981,7 @@ impl ExprCollector<'_> {
                 return collector(self, None);
             }
         };
-        if record_diagnostics {
-            if let Some(err) = res.err {
-                self.store
-                    .diagnostics
-                    .push(ExpressionStoreDiagnostics::MacroError { node: macro_call_ptr, err });
-            }
-        }
+        // No need to push macro and parsing errors as they'll be recreated from `macro_calls()`.
 
         match res.value {
             Some((mark, expansion)) => {
@@ -1997,10 +1991,6 @@ impl ExprCollector<'_> {
                     self.store.expansions.insert(macro_call_ptr, macro_file);
                 }
 
-                if record_diagnostics {
-                    // FIXME: Report parse errors here
-                }
-
                 let id = collector(self, expansion.map(|it| it.tree()));
                 self.expander.exit(mark);
                 id

crates/hir/src/lib.rs

@@ -1922,10 +1922,6 @@ impl DefWithBody {
             Module { id: def_map.module_id(DefMap::ROOT) }.diagnostics(db, acc, style_lints);
         }
 
-        source_map
-            .macro_calls()
-            .for_each(|(_ast_id, call_id)| macro_call_diagnostics(db, call_id, acc));
-
         expr_store_diagnostics(db, acc, &source_map);
 
         let infer = db.infer(self.into());
@@ -2130,9 +2126,9 @@ impl DefWithBody {
     }
 }
 
-fn expr_store_diagnostics(
-    db: &dyn HirDatabase,
-    acc: &mut Vec<AnyDiagnostic<'_>>,
+fn expr_store_diagnostics<'db>(
+    db: &'db dyn HirDatabase,
+    acc: &mut Vec<AnyDiagnostic<'db>>,
     source_map: &ExpressionStoreSourceMap,
 ) {
     for diag in source_map.diagnostics() {
@@ -2140,30 +2136,6 @@ fn expr_store_diagnostics(
             ExpressionStoreDiagnostics::InactiveCode { node, cfg, opts } => {
                 InactiveCode { node: *node, cfg: cfg.clone(), opts: opts.clone() }.into()
             }
-            ExpressionStoreDiagnostics::MacroError { node, err } => {
-                let RenderedExpandError { message, error, kind } = err.render_to_string(db);
-
-                let editioned_file_id = EditionedFileId::from_span(db, err.span().anchor.file_id);
-                let precise_location = if editioned_file_id == node.file_id {
-                    Some(
-                        err.span().range
-                            + db.ast_id_map(editioned_file_id.into())
-                                .get_erased(err.span().anchor.ast_id)
-                                .text_range()
-                                .start(),
-                    )
-                } else {
-                    None
-                };
-                MacroError {
-                    node: (node).map(|it| it.into()),
-                    precise_location,
-                    message,
-                    error,
-                    kind,
-                }
-                .into()
-            }
             ExpressionStoreDiagnostics::UnresolvedMacroCall { node, path } => UnresolvedMacroCall {
                 macro_call: (*node).map(|ast_ptr| ast_ptr.into()),
                 precise_location: None,
@@ -2182,6 +2154,10 @@ fn expr_store_diagnostics(
             }
         });
     }
+
+    source_map
+        .macro_calls()
+        .for_each(|(_ast_id, call_id)| macro_call_diagnostics(db, call_id, acc));
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct Function {