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Shrink diagnostic spans for errors inside macros
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67f548d8e9
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@ -350,6 +350,53 @@ impl MacroCallKind {
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}
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}
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/// Returns the original file range that best describes the location of this macro call.
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///
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/// Here we try to roughly match what rustc does to improve diagnostics: fn-like macros
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/// get the whole `ast::MacroCall`, attribute macros get the attribute's range, and derives
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/// get only the specific derive that is being referred to.
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pub fn original_call_range(self, db: &dyn db::AstDatabase) -> FileRange {
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let mut kind = self;
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loop {
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match kind.file_id().0 {
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HirFileIdRepr::MacroFile(file) => {
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kind = db.lookup_intern_macro_call(file.macro_call_id).kind;
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}
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_ => break,
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}
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}
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// `call_id` is now the outermost macro call, so its location is in a real file.
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let file_id = match kind.file_id().0 {
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HirFileIdRepr::FileId(it) => it,
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HirFileIdRepr::MacroFile(_) => unreachable!("encountered unexpected macro file"),
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};
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let range = match kind {
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MacroCallKind::FnLike { ast_id, .. } => ast_id.to_node(db).syntax().text_range(),
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MacroCallKind::Derive { ast_id, derive_attr_index, .. } => {
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// FIXME: should be the range of the macro name, not the whole derive
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ast_id
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.to_node(db)
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.doc_comments_and_attrs()
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.nth(derive_attr_index as usize)
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.expect("missing derive")
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.expect_right("derive is a doc comment?")
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.syntax()
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.text_range()
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}
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MacroCallKind::Attr { ast_id, invoc_attr_index, .. } => ast_id
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.to_node(db)
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.doc_comments_and_attrs()
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.nth(invoc_attr_index as usize)
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.expect("missing attribute")
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.expect_right("attribute macro is a doc comment?")
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.syntax()
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.text_range(),
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};
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FileRange { range, file_id }
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}
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fn arg(&self, db: &dyn db::AstDatabase) -> Option<SyntaxNode> {
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match self {
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MacroCallKind::FnLike { ast_id, .. } => {
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@ -623,15 +670,13 @@ impl<'a> InFile<&'a SyntaxNode> {
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}
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// Fall back to whole macro call.
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let mut node = self.cloned();
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while let Some(call_node) = node.file_id.call_node(db) {
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node = call_node;
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match self.file_id.0 {
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HirFileIdRepr::FileId(file_id) => FileRange { file_id, range: self.value.text_range() },
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HirFileIdRepr::MacroFile(mac_file) => {
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let loc = db.lookup_intern_macro_call(mac_file.macro_call_id);
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loc.kind.original_call_range(db)
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}
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}
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let orig_file = node.file_id.original_file(db);
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assert_eq!(node.file_id, orig_file.into());
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FileRange { file_id: orig_file, range: node.value.text_range() }
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}
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/// Attempts to map the syntax node back up its macro calls.
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@ -51,7 +51,7 @@ impl Abi {
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&proc_macro::bridge::server::SameThread,
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rustc_server::Rustc::default(),
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -62,7 +62,7 @@ impl Abi {
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&proc_macro::bridge::server::SameThread,
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rustc_server::Rustc::default(),
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -74,7 +74,7 @@ impl Abi {
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rustc_server::Rustc::default(),
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parsed_attributes,
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -51,7 +51,7 @@ impl Abi {
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&proc_macro::bridge::server::SameThread,
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rustc_server::Rustc::default(),
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -62,7 +62,7 @@ impl Abi {
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&proc_macro::bridge::server::SameThread,
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rustc_server::Rustc::default(),
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -74,7 +74,7 @@ impl Abi {
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rustc_server::Rustc::default(),
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parsed_attributes,
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parsed_body,
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false,
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true,
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);
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return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
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}
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@ -772,7 +772,6 @@ impl ast::HasLoopBody for ast::ForExpr {
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}
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impl ast::HasAttrs for ast::AnyHasDocComments {}
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impl ast::HasDocComments for ast::Item {}
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impl From<ast::Adt> for ast::Item {
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fn from(it: ast::Adt) -> Self {
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