diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/ChangeLog | 5 | ||||
| -rw-r--r-- | include/ansidecl.h | 28 |
2 files changed, 27 insertions, 6 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index a379768..18bc5ff 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,8 @@ +2016-10-14 Pedro Alves <palves@redhat.com> + + * ansidecl.h (GCC_FINAL): Delete. + (OVERRIDE, FINAL): New, moved from gcc/coretypes.h. + 2016-08-15 Jakub Jelinek <jakub@redhat.com> * dwarf2.def (DW_AT_string_length_bit_size, diff --git a/include/ansidecl.h b/include/ansidecl.h index 6e4bfc2..ee93421 100644 --- a/include/ansidecl.h +++ b/include/ansidecl.h @@ -313,13 +313,29 @@ So instead we use the macro below and test it against specific values. */ #define ENUM_BITFIELD(TYPE) unsigned int #endif - /* This is used to mark a class or virtual function as final. */ -#if __cplusplus >= 201103L -#define GCC_FINAL final -#elif GCC_VERSION >= 4007 -#define GCC_FINAL __final +/* C++11 adds the ability to add "override" after an implementation of a + virtual function in a subclass, to: + (A) document that this is an override of a virtual function + (B) allow the compiler to issue a warning if it isn't (e.g. a mismatch + of the type signature). + + Similarly, it allows us to add a "final" to indicate that no subclass + may subsequently override the vfunc. + + Provide OVERRIDE and FINAL as macros, allowing us to get these benefits + when compiling with C++11 support, but without requiring C++11. + + For gcc, use "-std=c++11" to enable C++11 support; gcc 6 onwards enables + this by default (actually GNU++14). */ + +#if __cplusplus >= 201103 +/* C++11 claims to be available: use it: */ +#define OVERRIDE override +#define FINAL final #else -#define GCC_FINAL +/* No C++11 support; leave the macros empty: */ +#define OVERRIDE +#define FINAL #endif #ifdef __cplusplus |