Simplify include handling

crates/hir-expand/src/builtin_fn_macro.rs

@@ -17,7 +17,7 @@ use crate::{
     hygiene::span_with_def_site_ctxt,
     name, quote,
     tt::{self, DelimSpan},
-    EagerCallInfo, ExpandError, ExpandResult, HirFileIdExt, MacroCallId, MacroCallLoc,
+    ExpandError, ExpandResult, HirFileIdExt, MacroCallId, MacroCallLoc,
 };
 
 macro_rules! register_builtin {
@@ -575,36 +575,32 @@ fn parse_string(tt: &tt::Subtree) -> Result<String, ExpandError> {
 fn include_expand(
     db: &dyn ExpandDatabase,
     arg_id: MacroCallId,
-    _tt: &tt::Subtree,
+    tt: &tt::Subtree,
     span: SpanData,
 ) -> ExpandResult<tt::Subtree> {
-    match db.include_expand(arg_id) {
-        Ok((res, _)) => ExpandResult::ok(res.as_ref().clone()),
-        Err(e) => ExpandResult::new(tt::Subtree::empty(DelimSpan { open: span, close: span }), e),
-    }
-}
-
-// FIXME: Check if this is still needed now after the token map rewrite
-pub(crate) fn include_arg_to_tt(
-    db: &dyn ExpandDatabase,
-    arg_id: MacroCallId,
-) -> Result<(triomphe::Arc<tt::Subtree>, FileId), ExpandError> {
-    let loc = db.lookup_intern_macro_call(arg_id);
-    let Some(EagerCallInfo { arg, arg_id, .. }) = loc.eager.as_deref() else {
-        panic!("include_arg_to_tt called on non include macro call: {:?}", &loc.eager);
+    let path = match parse_string(tt) {
+        Ok(it) => it,
+        Err(e) => {
+            return ExpandResult::new(tt::Subtree::empty(DelimSpan { open: span, close: span }), e)
+        }
     };
-    let path = parse_string(&arg)?;
-    let file_id = relative_file(db, *arg_id, &path, false)?;
-
-    // why are we not going through a SyntaxNode here?
-    let subtree = parse_to_token_tree(
+    let file_id = match relative_file(db, arg_id, &path, false) {
+        Ok(file_id) => file_id,
+        Err(e) => {
+            return ExpandResult::new(tt::Subtree::empty(DelimSpan { open: span, close: span }), e);
+        }
+    };
+    match parse_to_token_tree(
         SpanAnchor { file_id, ast_id: ROOT_ERASED_FILE_AST_ID },
-        // FIXME
         SyntaxContextId::ROOT,
         &db.file_text(file_id),
-    )
-    .ok_or(mbe::ExpandError::ConversionError)?;
-    Ok((triomphe::Arc::new(subtree), file_id))
+    ) {
+        Some(it) => ExpandResult::ok(it),
+        None => ExpandResult::new(
+            tt::Subtree::empty(DelimSpan { open: span, close: span }),
+            ExpandError::other("failed to parse included file"),
+        ),
+    }
 }
 
 fn include_bytes_expand(
@@ -613,9 +609,12 @@ fn include_bytes_expand(
     tt: &tt::Subtree,
     span: SpanData,
 ) -> ExpandResult<tt::Subtree> {
-    if let Err(e) = parse_string(tt) {
-        return ExpandResult::new(tt::Subtree::empty(DelimSpan { open: span, close: span }), e);
-    }
+    let _path = match parse_string(tt) {
+        Ok(it) => it,
+        Err(e) => {
+            return ExpandResult::new(tt::Subtree::empty(DelimSpan { open: span, close: span }), e)
+        }
+    };
 
     // FIXME: actually read the file here if the user asked for macro expansion
     let res = tt::Subtree {

crates/hir-expand/src/db.rs

@@ -142,12 +142,6 @@ pub trait ExpandDatabase: SourceDatabase {
         def_crate: CrateId,
         id: AstId<ast::Macro>,
     ) -> Arc<DeclarativeMacroExpander>;
-
-    #[salsa::invoke(crate::builtin_fn_macro::include_arg_to_tt)]
-    fn include_expand(
-        &self,
-        arg_id: MacroCallId,
-    ) -> Result<(triomphe::Arc<tt::Subtree>, base_db::FileId), ExpandError>;
     /// Special case of the previous query for procedural macros. We can't LRU
     /// proc macros, since they are not deterministic in general, and
     /// non-determinism breaks salsa in a very, very, very bad way.

crates/hir-expand/src/lib.rs

@@ -208,12 +208,7 @@ impl HirFileIdExt for HirFileId {
             match file_id.repr() {
                 HirFileIdRepr::FileId(id) => break id,
                 HirFileIdRepr::MacroFile(MacroFileId { macro_call_id }) => {
-                    let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_call_id);
-                    let is_include_expansion = loc.def.is_include() && loc.eager.is_some();
-                    file_id = match is_include_expansion.then(|| db.include_expand(macro_call_id)) {
-                        Some(Ok((_, file))) => file.into(),
-                        _ => loc.kind.file_id(),
-                    }
+                    file_id = db.lookup_intern_macro_call(macro_call_id).kind.file_id();
                 }
             }
         }

crates/hir/src/db.rs

@@ -23,7 +23,7 @@ pub use hir_def::db::{
 };
 pub use hir_expand::db::{
     AstIdMapQuery, DeclMacroExpanderQuery, ExpandDatabase, ExpandDatabaseStorage,
-    ExpandProcMacroQuery, IncludeExpandQuery, InternMacroCallQuery, InternSyntaxContextQuery,
-    MacroArgQuery, ParseMacroExpansionErrorQuery, ParseMacroExpansionQuery, RealSpanMapQuery,
+    ExpandProcMacroQuery, InternMacroCallQuery, InternSyntaxContextQuery, MacroArgQuery,
+    ParseMacroExpansionErrorQuery, ParseMacroExpansionQuery, RealSpanMapQuery,
 };
 pub use hir_ty::db::*;

crates/ide-db/src/apply_change.rs

@@ -99,7 +99,6 @@ impl RootDatabase {
             hir::db::AstIdMapQuery
             hir::db::DeclMacroExpanderQuery
             hir::db::ExpandProcMacroQuery
-            hir::db::IncludeExpandQuery
             hir::db::InternMacroCallQuery
             hir::db::InternSyntaxContextQuery
             hir::db::MacroArgQuery

crates/ide-diagnostics/src/handlers/unresolved_macro_call.rs

@@ -67,6 +67,22 @@ macro_rules! m { () => {} } }
 
 self::m!(); self::m2!();
                 //^^ error: unresolved macro `self::m2!`
+"#,
+        );
+    }
+
+    #[test]
+    #[should_panic] // FIXME: https://github.com/rust-lang/rust-analyzer/issues/14968
+    fn include_does_not_break_diagnostics() {
+        check_diagnostics(
+            r#"
+//- minicore: include
+//- /lib.rs crate:lib
+include!("include-me.rs");
+//- /include-me.rs
+/// long doc that pushes the diagnostic range beyond the first file's text length
+#[err]
+mod prim_never {}
 "#,
         );
     }