diff options
| -rw-r--r-- | crates/hir_expand/src/db.rs | 41 |
1 files changed, 1 insertions, 40 deletions
diff --git a/crates/hir_expand/src/db.rs b/crates/hir_expand/src/db.rs index ac07daa0ab3..e14c669b4c9 100644 --- a/crates/hir_expand/src/db.rs +++ b/crates/hir_expand/src/db.rs @@ -8,7 +8,6 @@ use limit::Limit; use mbe::syntax_node_to_token_tree; use rustc_hash::FxHashSet; use syntax::{ - algo::diff, ast::{self, HasAttrs, HasDocComments}, AstNode, GreenNode, Parse, SyntaxNode, SyntaxToken, T, }; @@ -283,28 +282,7 @@ fn parse_macro_expansion( let (parse, rev_token_map) = token_tree_to_syntax_node(&tt, expand_to); - match result.err { - Some(err) => { - // Safety check for recursive identity macro. - let node = parse.syntax_node(); - let file: HirFileId = macro_file.into(); - let call_node = match file.call_node(db) { - Some(it) => it, - None => { - return ExpandResult::only_err(err); - } - }; - if is_self_replicating(&node, &call_node.value) { - ExpandResult::only_err(err) - } else { - ExpandResult { value: Some((parse, Arc::new(rev_token_map))), err: Some(err) } - } - } - None => { - tracing::debug!("parse = {:?}", parse.syntax_node().kind()); - ExpandResult { value: Some((parse, Arc::new(rev_token_map))), err: None } - } - } + ExpandResult { value: Some((parse, Arc::new(rev_token_map))), err: result.err } } fn macro_arg( @@ -507,23 +485,6 @@ fn expand_proc_macro(db: &dyn AstDatabase, id: MacroCallId) -> ExpandResult<tt:: expander.expand(db, loc.krate, ¯o_arg.0, attr_arg.as_ref()) } -fn is_self_replicating(from: &SyntaxNode, to: &SyntaxNode) -> bool { - if diff(from, to).is_empty() { - return true; - } - if let Some(stmts) = ast::MacroStmts::cast(from.clone()) { - if stmts.statements().any(|stmt| diff(stmt.syntax(), to).is_empty()) { - return true; - } - if let Some(expr) = stmts.expr() { - if diff(expr.syntax(), to).is_empty() { - return true; - } - } - } - false -} - fn hygiene_frame(db: &dyn AstDatabase, file_id: HirFileId) -> Arc<HygieneFrame> { Arc::new(HygieneFrame::new(db, file_id)) } |