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-rw-r--r--crates/ra_hir_expand/src/db.rs24
1 files changed, 21 insertions, 3 deletions
diff --git a/crates/ra_hir_expand/src/db.rs b/crates/ra_hir_expand/src/db.rs
index d171d2dfd..4421d187b 100644
--- a/crates/ra_hir_expand/src/db.rs
+++ b/crates/ra_hir_expand/src/db.rs
@@ -6,7 +6,7 @@ use mbe::{ExpandResult, MacroRules};
6use ra_db::{salsa, SourceDatabase}; 6use ra_db::{salsa, SourceDatabase};
7use ra_parser::FragmentKind; 7use ra_parser::FragmentKind;
8use ra_prof::profile; 8use ra_prof::profile;
9use ra_syntax::{AstNode, Parse, SyntaxKind::*, SyntaxNode}; 9use ra_syntax::{algo::diff, AstNode, Parse, SyntaxKind::*, SyntaxNode};
10 10
11use crate::{ 11use crate::{
12 ast_id_map::AstIdMap, BuiltinDeriveExpander, BuiltinFnLikeExpander, EagerCallLoc, EagerMacroId, 12 ast_id_map::AstIdMap, BuiltinDeriveExpander, BuiltinFnLikeExpander, EagerCallLoc, EagerMacroId,
@@ -238,7 +238,7 @@ pub fn parse_macro_with_arg(
238 } else { 238 } else {
239 db.macro_expand(macro_call_id) 239 db.macro_expand(macro_call_id)
240 }; 240 };
241 if let Some(err) = err { 241 if let Some(err) = &err {
242 // Note: 242 // Note:
243 // The final goal we would like to make all parse_macro success, 243 // The final goal we would like to make all parse_macro success,
244 // such that the following log will not call anyway. 244 // such that the following log will not call anyway.
@@ -272,7 +272,25 @@ pub fn parse_macro_with_arg(
272 let fragment_kind = to_fragment_kind(db, macro_call_id); 272 let fragment_kind = to_fragment_kind(db, macro_call_id);
273 273
274 let (parse, rev_token_map) = mbe::token_tree_to_syntax_node(&tt, fragment_kind).ok()?; 274 let (parse, rev_token_map) = mbe::token_tree_to_syntax_node(&tt, fragment_kind).ok()?;
275 Some((parse, Arc::new(rev_token_map))) 275
276 if err.is_none() {
277 Some((parse, Arc::new(rev_token_map)))
278 } else {
279 // FIXME:
280 // In future, we should proprate the actual error with recovery information
281 // instead of ignore the error here.
282
283 // Safe check for recurisve identity macro
284 let node = parse.syntax_node();
285 let file: HirFileId = macro_file.into();
286 let call_node = file.call_node(db)?;
287
288 if !diff(&node, &call_node.value).is_empty() {
289 Some((parse, Arc::new(rev_token_map)))
290 } else {
291 None
292 }
293 }
276} 294}
277 295
278/// Given a `MacroCallId`, return what `FragmentKind` it belongs to. 296/// Given a `MacroCallId`, return what `FragmentKind` it belongs to.