Hi! On the following testcase, we emit "did you mean '__dt '?" in the error message. "__dt " shows there because it is dtor_identifier, but we shouldn't suggest those to the user, they are purely internal and can't be really typed by the user because of the final space in it.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? 2022-03-08 Jakub Jelinek <ja...@redhat.com> PR c++/104806 * search.cc (lookup_field_fuzzy_info::fuzzy_lookup_field): Ignore identifiers with space at the end. * g++.dg/spellcheck-pr104806.C: New test. --- gcc/cp/search.cc.jj 2022-01-18 11:58:59.407984557 +0100 +++ gcc/cp/search.cc 2022-03-07 10:44:33.455673155 +0100 @@ -1275,6 +1275,13 @@ lookup_field_fuzzy_info::fuzzy_lookup_fi if (is_lambda_ignored_entity (field)) continue; + /* Ignore special identifiers with space at the end like cdtor or + conversion op identifiers. */ + if (TREE_CODE (DECL_NAME (field)) == IDENTIFIER_NODE) + if (unsigned int len = IDENTIFIER_LENGTH (DECL_NAME (field))) + if (IDENTIFIER_POINTER (DECL_NAME (field))[len - 1] == ' ') + continue; + m_candidates.safe_push (DECL_NAME (field)); } } --- gcc/testsuite/g++.dg/spellcheck-pr104806.C.jj 2022-03-07 10:34:07.224499657 +0100 +++ gcc/testsuite/g++.dg/spellcheck-pr104806.C 2022-03-07 10:43:41.900399808 +0100 @@ -0,0 +1,5 @@ +// PR c++/104806 + +struct S {}; +int main() { S s; s.__d; } // { dg-bogus "'struct S' has no member named '__d'; did you mean '__\[a-z]* '" } + // { dg-error "'struct S' has no member named '__d'" "" { target *-*-* } .-1 } Jakub