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Diffstat (limited to 'gcc/cp/lex.cc')
| -rw-r--r-- | gcc/cp/lex.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/cp/lex.cc b/gcc/cp/lex.cc index c12b084..12af81e 100644 --- a/gcc/cp/lex.cc +++ b/gcc/cp/lex.cc @@ -749,6 +749,9 @@ unqualified_name_lookup_error (tree name, location_t loc) if (IDENTIFIER_ANY_OP_P (name)) error_at (loc, "%qD not defined", name); + else if (!flag_concepts && name == ridpointers[(int)RID_REQUIRES]) + error_at (loc, "%<requires%> only available with %<-std=c++20%> or " + "%<-fconcepts%>"); else { if (!objc_diagnose_private_ivar (name)) |