Some more minor cleanups

crates/base-db/src/lib.rs

@@ -4,7 +4,6 @@
 
 mod input;
 mod change;
-// FIXME: Is this purely a test util mod? Consider #[cfg(test)] gating it.
 pub mod fixture;
 pub mod span;
 

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

@@ -2,7 +2,6 @@ mod block;
 
 use base_db::{fixture::WithFixture, SourceDatabase};
 use expect_test::{expect, Expect};
-use hir_expand::db::ExpandDatabase;
 
 use crate::{test_db::TestDB, ModuleDefId};
 
@@ -255,7 +254,6 @@ impl SsrError {
 }
 "##,
     );
-    println!("{}", db.dump_syntax_contexts());
 
     assert_eq!(db.body_with_source_map(def.into()).1.diagnostics(), &[]);
     expect![[r#"
@@ -288,3 +286,49 @@ impl SsrError {
         }"#]]
     .assert_eq(&body.pretty_print(&db, def))
 }
+
+#[test]
+fn regression_10300() {
+    let (db, body, def) = lower(
+        r#"
+//- minicore: concat, panic
+mod private {
+    pub use core::concat;
+}
+
+macro_rules! m {
+    () => {
+        panic!(concat!($crate::private::concat!("cc")));
+    };
+}
+
+fn f() {
+    m!();
+}
+"#,
+    );
+
+    let (_, source_map) = db.body_with_source_map(def.into());
+    assert_eq!(source_map.diagnostics(), &[]);
+
+    for (_, def_map) in body.blocks(&db) {
+        assert_eq!(def_map.diagnostics(), &[]);
+    }
+
+    expect![[r#"
+        fn f() {
+            $crate::panicking::panic_fmt(
+                builtin#lang(Arguments::new_v1_formatted)(
+                    &[
+                        "\"cc\"",
+                    ],
+                    &[],
+                    &[],
+                    unsafe {
+                        builtin#lang(UnsafeArg::new)()
+                    },
+                ),
+            );
+        }"#]]
+    .assert_eq(&body.pretty_print(&db, def))
+}

crates/hir-expand/src/lib.rs

@@ -628,14 +628,13 @@ impl ExpansionInfo {
         span: SpanData,
         // FIXME: use this for range mapping, so that we can resolve inline format args
         _relative_token_offset: Option<TextSize>,
-        // FIXME: ret ty should be wrapped in InMacroFile
+    ) -> Option<impl Iterator<Item = InMacroFile<SyntaxToken>> + 'a> {
-    ) -> Option<impl Iterator<Item = InFile<SyntaxToken>> + 'a> {
         let tokens = self
             .exp_map
             .ranges_with_span(span)
             .flat_map(move |range| self.expanded.value.covering_element(range).into_token());
 
-        Some(tokens.map(move |token| InFile::new(self.expanded.file_id.into(), token)))
+        Some(tokens.map(move |token| InMacroFile::new(self.expanded.file_id, token)))
     }
 
     /// Maps up the text range out of the expansion hierarchy back into the original file its from.

crates/hir-ty/src/tests/macros.rs

@@ -63,10 +63,10 @@ fn infer_macros_expanded() {
         }
         "#,
         expect![[r#"
-            !0..21 '{Foo(v...2),])}': Foo
+            !0..17 '{Foo(v...,2,])}': Foo
             !1..4 'Foo': Foo({unknown}) -> Foo
-            !1..20 'Foo(ve...(2),])': Foo
+            !1..16 'Foo(vec![1,2,])': Foo
-            !5..19 'vec![(1),(2),]': {unknown}
+            !5..15 'vec![1,2,]': {unknown}
             155..181 '{     ...,2); }': ()
             165..166 'x': Foo
         "#]],
@@ -96,10 +96,10 @@ fn infer_legacy_textual_scoped_macros_expanded() {
         }
         "#,
         expect![[r#"
-            !0..21 '{Foo(v...2),])}': Foo
+            !0..17 '{Foo(v...,2,])}': Foo
             !1..4 'Foo': Foo({unknown}) -> Foo
-            !1..20 'Foo(ve...(2),])': Foo
+            !1..16 'Foo(vec![1,2,])': Foo
-            !5..19 'vec![(1),(2),]': {unknown}
+            !5..15 'vec![1,2,]': {unknown}
             194..250 '{     ...,2); }': ()
             204..205 'x': Foo
             227..228 'y': {unknown}

crates/hir/src/semantics.rs

@@ -557,11 +557,6 @@ impl<'db> SemanticsImpl<'db> {
                 .span_at(token.text_range().start()),
         };
 
-        // fetch span information of token in real file, then use that look through expansions of
-        // calls the token is in and afterwards recursively with the same span.
-        // what about things where spans change? Due to being joined etc, that is we don't find the
-        // exact span anymore?
-
         let def_map = sa.resolver.def_map();
         let mut stack: SmallVec<[_; 4]> = smallvec![InFile::new(sa.file_id, token)];
 
@@ -580,7 +575,7 @@ impl<'db> SemanticsImpl<'db> {
                 let len = stack.len();
 
                 // requeue the tokens we got from mapping our current token down
-                stack.extend(mapped_tokens);
+                stack.extend(mapped_tokens.map(Into::into));
                 // if the length changed we have found a mapping for the token
                 (stack.len() != len).then_some(())
             };

crates/ide/src/expand_macro.rs

@@ -340,8 +340,8 @@ fn main() {
             expect![[r#"
                 match_ast!
                 {
-                  if let Some(it) = ast::TraitDef::cast((container).clone()){}
+                  if let Some(it) = ast::TraitDef::cast(container.clone()){}
-                  else if let Some(it) = ast::ImplDef::cast((container).clone()){}
+                  else if let Some(it) = ast::ImplDef::cast(container.clone()){}
                   else {
                     {
                       continue

crates/test-utils/src/minicore.rs

@@ -15,6 +15,7 @@
 //!     cell: copy, drop
 //!     clone: sized
 //!     coerce_unsized: unsize
+//!     concat:
 //!     copy: clone
 //!     default: sized
 //!     deref_mut: deref
@@ -1353,7 +1354,7 @@ mod panicking {
 mod macros {
     // region:panic
     #[macro_export]
-    #[rustc_builtin_macro(std_panic)]
+    #[rustc_builtin_macro(core_panic)]
     macro_rules! panic {
         ($($arg:tt)*) => {
             /* compiler built-in */
@@ -1406,6 +1407,12 @@ mod macros {
         ($file:expr $(,)?) => {{ /* compiler built-in */ }};
     }
     // endregion:include
+
+    // region:concat
+    #[rustc_builtin_macro]
+    #[macro_export]
+    macro_rules! concat {}
+    // endregion:concat
 }
 
 // region:non_zero