This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 118e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-11-05
[Adopted at the February, 2016 meeting.]
There should be a rule to prohibit the almost certainly erroneous declaration
typedef struct X { }; / Missing declarator
Proposed resolution (September, 2015):
Change 9.2.4 [dcl.typedef] paragraph 1 as follows:
Declarations containing the decl-specifier typedef declare identifiers that can be used later for naming fundamental (6.9.2 [basic.compound]) types. The typedef specifier shall not be combined in a decl-specifier-seq with any other kind of specifier except a type-specifier, and it shall not be used in the decl-specifier-seq of a parameter-declaration (9.3.4.6 [dcl.fct]) nor in the decl-specifier-seq of a function-definition (9.6 [dcl.fct.def]). If a typedef specifier appears in a declaration without a declarator, the program is ill-formed.