@@ -12723,8 +12723,17 @@ cp_parser_simple_declaration (cp_parser*
break;
tree last_type;
+ bool auto_specifier_p;
+ /* NULL_TREE if both variable and function declaration are allowed,
+ error_mark_node if function declaration are not allowed and
+ a FUNCTION_DECL that should be diagnosed if it is followed by
+ variable declarations. */
+ tree auto_function_declaration;
last_type = NULL_TREE;
+ auto_specifier_p
+ = decl_specifiers.type && type_uses_auto (decl_specifiers.type);
+ auto_function_declaration = NULL_TREE;
/* Keep going until we hit the `;' at the end of the simple
declaration. */
@@ -12770,6 +12779,27 @@ cp_parser_simple_declaration (cp_parser*
if (cp_parser_error_occurred (parser))
goto done;
+ if (auto_specifier_p && cxx_dialect >= cxx14)
+ {
+ /* If the init-declarator-list contains more than one
+ init-declarator, they shall all form declarations of
+ variables. */
+ if (auto_function_declaration
+ && (TREE_CODE (decl) == FUNCTION_DECL
+ || auto_function_declaration != error_mark_node))
+ {
+ error_at (decl_specifiers.locations[ds_type_spec],
+ "non-variable %qD in declaration with more than one "
+ "declarator with placeholder type",
+ TREE_CODE (decl) == FUNCTION_DECL
+ ? decl : auto_function_declaration);
+ auto_function_declaration = error_mark_node;
+ }
+ else if (auto_function_declaration == NULL_TREE)
+ auto_function_declaration
+ = TREE_CODE (decl) == FUNCTION_DECL ? decl : error_mark_node;
+ }
+
if (auto_result)
{
if (last_type && last_type != error_mark_node
@@ -0,0 +1,12 @@
+// { dg-do compile { target c++14 } }
+
+auto f1 ();
+auto a = 5, f2 (); // { dg-error "in declaration with more than one declarator" }
+auto f3 (), b = 6; // { dg-error "in declaration with more than one declarator" }
+auto f4 (), f5 (), f6 (); // { dg-error "in declaration with more than one declarator" }
+auto f1 () { return 3; }
+auto f2 () { return 4; }
+auto f3 () { return 5; }
+auto f4 () { return 6; }
+auto f5 () { return 7; }
+auto f6 () { return 8; }