On 1/15/25 4:31 PM, Jakub Jelinek wrote:
Hi!

This is something we should have done when -std=c++23 was made the
primary option and -std=c++2b turned into undocumented alias.

Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?

OK.

2025-01-15  Jakub Jelinek  <ja...@redhat.com>

gcc/cp/
        * parser.cc (cp_parser_lambda_declarator_opt,
        cp_parser_statement, cp_parser_selection_statement,
        cp_parser_jump_statement): Use -std=c++23 and -std=gnu++23
        in diagnostics rather than -std=c++2b and -std=gnu++2b.
        * semantics.cc (finish_compound_literal): Likewise.
        * typeck2.cc (build_functional_cast_1): Likewise.
        * decl.cc (start_decl): Likewise.
        * constexpr.cc (ensure_literal_type_for_constexpr_object,
        potential_constant_expression_1): Likewise.
gcc/c-family/
        * c-lex.cc (interpret_float): Use -std=c++23 and -std=gnu++23
        in diagnostics rather than -std=c++2b and -std=gnu++2b.

--- gcc/cp/parser.cc.jj 2025-01-15 08:43:39.070926235 +0100
+++ gcc/cp/parser.cc    2025-01-15 12:16:00.376964834 +0100
@@ -12165,8 +12165,8 @@ cp_parser_lambda_declarator_opt (cp_pars
      {
        pedwarn (omitted_parms_loc, OPT_Wc__23_extensions,
               "parameter declaration before lambda declaration "
-              "specifiers only optional with %<-std=c++2b%> or "
-              "%<-std=gnu++2b%>");
+              "specifiers only optional with %<-std=c++23%> or "
+              "%<-std=gnu++23%>");
        omitted_parms_loc = UNKNOWN_LOCATION;
      }
    /* Peek at the params, see if we have an xobj parameter.  */
@@ -12262,8 +12262,8 @@ cp_parser_lambda_declarator_opt (cp_pars
      {
        pedwarn (omitted_parms_loc, OPT_Wc__23_extensions,
               "parameter declaration before lambda transaction "
-              "qualifier only optional with %<-std=c++2b%> or "
-              "%<-std=gnu++2b%>");
+              "qualifier only optional with %<-std=c++23%> or "
+              "%<-std=gnu++23%>");
        omitted_parms_loc = UNKNOWN_LOCATION;
      }
@@ -12275,8 +12275,8 @@ cp_parser_lambda_declarator_opt (cp_pars
      {
        pedwarn (omitted_parms_loc, OPT_Wc__23_extensions,
               "parameter declaration before lambda exception "
-              "specification only optional with %<-std=c++2b%> or "
-              "%<-std=gnu++2b%>");
+              "specification only optional with %<-std=c++23%> or "
+              "%<-std=gnu++23%>");
        omitted_parms_loc = UNKNOWN_LOCATION;
      }
@@ -12293,8 +12293,8 @@ cp_parser_lambda_declarator_opt (cp_pars
        if (omitted_parms_loc)
        pedwarn (omitted_parms_loc, OPT_Wc__23_extensions,
                 "parameter declaration before lambda trailing "
-                "return type only optional with %<-std=c++2b%> or "
-                "%<-std=gnu++2b%>");
+                "return type only optional with %<-std=c++23%> or "
+                "%<-std=gnu++23%>");
        cp_lexer_consume_token (parser->lexer);
        return_type = cp_parser_trailing_type_id (parser);
      }
@@ -13069,7 +13069,7 @@ cp_parser_statement (cp_parser* parser,
              if (cxx_dialect < cxx23)
                pedwarn (loc, OPT_Wc__23_extensions,
                         "label at end of compound statement only available "
-                        "with %<-std=c++2b%> or %<-std=gnu++2b%>");
+                        "with %<-std=c++23%> or %<-std=gnu++23%>");
              return;
            }
          in_compound_for_pragma = false;
@@ -13826,7 +13826,7 @@ cp_parser_selection_statement (cp_parser
            if (cxx_dialect < cxx23)
              pedwarn (tok->location, OPT_Wc__23_extensions,
                       "%<if consteval%> only available with "
-                      "%<-std=c++2b%> or %<-std=gnu++2b%>");
+                      "%<-std=c++23%> or %<-std=gnu++23%>");
bool save_in_consteval_if_p = in_consteval_if_p;
            statement = begin_if_stmt ();
@@ -15225,7 +15225,7 @@ cp_parser_jump_statement (cp_parser* par
          && cxx_dialect < cxx23)
        {
          error ("%<goto%> in %<constexpr%> function only available with "
-                "%<-std=c++2b%> or %<-std=gnu++2b%>");
+                "%<-std=c++23%> or %<-std=gnu++23%>");
          cp_function_chain->invalid_constexpr = true;
        }
--- gcc/cp/semantics.cc.jj 2025-01-10 10:32:28.723730783 +0100
+++ gcc/cp/semantics.cc 2025-01-15 12:16:14.453769788 +0100
@@ -3751,7 +3751,7 @@ finish_compound_literal (tree type, tree
        else if (cxx_dialect < cxx23)
        pedwarn (input_location, OPT_Wc__23_extensions,
                 "%<auto{x}%> only available with "
-                "%<-std=c++2b%> or %<-std=gnu++2b%>");
+                "%<-std=c++23%> or %<-std=gnu++23%>");
        type = do_auto_deduction (type, compound_literal, type, complain,
                                adc_variable_type);
        if (type == error_mark_node)
--- gcc/cp/typeck2.cc.jj        2025-01-15 08:43:39.071926221 +0100
+++ gcc/cp/typeck2.cc   2025-01-15 12:16:32.855514816 +0100
@@ -2507,7 +2507,7 @@ build_functional_cast_1 (location_t loc,
          else if (cxx_dialect < cxx23)
            pedwarn (loc, OPT_Wc__23_extensions,
                     "%<auto(x)%> only available with "
-                    "%<-std=c++2b%> or %<-std=gnu++2b%>");
+                    "%<-std=c++23%> or %<-std=gnu++23%>");
        }
        else
        {
--- gcc/cp/decl.cc.jj   2025-01-15 10:50:36.558273251 +0100
+++ gcc/cp/decl.cc      2025-01-15 12:15:34.124328583 +0100
@@ -6202,13 +6202,13 @@ start_decl (const cp_declarator *declara
        if (CP_DECL_THREAD_LOCAL_P (decl) && !DECL_REALLY_EXTERN (decl))
        error_at (DECL_SOURCE_LOCATION (decl),
                  "%qD defined %<thread_local%> in %qs function only "
-                 "available with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
+                 "available with %<-std=c++23%> or %<-std=gnu++23%>", decl,
                  DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
                  ? "consteval" : "constexpr");
        else if (TREE_STATIC (decl))
        error_at (DECL_SOURCE_LOCATION (decl),
                  "%qD defined %<static%> in %qs function only available "
-                 "with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
+                 "with %<-std=c++23%> or %<-std=gnu++23%>", decl,
                  DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
                  ? "consteval" : "constexpr");
        else
--- gcc/cp/constexpr.cc.jj      2025-01-14 09:36:43.787521974 +0100
+++ gcc/cp/constexpr.cc 2025-01-15 12:15:18.736541793 +0100
@@ -122,7 +122,7 @@ ensure_literal_type_for_constexpr_object
                  error_at (DECL_SOURCE_LOCATION (decl),
                            "variable %qD of non-literal type %qT in "
                            "%<constexpr%> function only available with "
-                           "%<-std=c++2b%> or %<-std=gnu++2b%>", decl, type);
+                           "%<-std=c++23%> or %<-std=gnu++23%>", decl, type);
                  explain_non_literal_class (type);
                  decl = error_mark_node;
                }
@@ -10736,8 +10736,8 @@ potential_constant_expression_1 (tree t,
        return true;
        else if (flags & tf_error)
        constexpr_error (loc, fundef_p, "label definition in %<constexpr%> "
-                        "function only available with %<-std=c++2b%> or "
-                        "%<-std=gnu++2b%>");
+                        "function only available with %<-std=c++23%> or "
+                        "%<-std=gnu++23%>");
        return false;
case ANNOTATE_EXPR:
--- gcc/c-family/c-lex.cc.jj    2025-01-02 11:47:29.639230367 +0100
+++ gcc/c-family/c-lex.cc       2025-01-15 12:16:58.322161960 +0100
@@ -1307,7 +1307,7 @@ interpret_float (const cpp_token *token,
            if (cxx_dialect < cxx23 && pedantic)
              pedwarn (input_location, OPT_Wc__23_extensions,
                       "%<f%d%> or %<F%d%> suffix on floating constant only "
-                      "available with %<-std=c++2b%> or %<-std=gnu++2b%>",
+                      "available with %<-std=c++23%> or %<-std=gnu++23%>",
                       n, n);
          }
        else
@@ -1328,7 +1328,7 @@ interpret_float (const cpp_token *token,
        else if (cxx_dialect < cxx23 && pedantic)
          pedwarn (input_location, OPT_Wc__23_extensions,
                   "%<bf16%> or %<BF16%> suffix on floating constant only "
-                  "available with %<-std=c++2b%> or %<-std=gnu++2b%>");
+                  "available with %<-std=c++23%> or %<-std=gnu++23%>");
        }
      else if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
        type = long_double_type_node;

        Jakub


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